Upgrade V8 to 3.0.8

deps/v8/0001-Patch-for-Cygwin.patch

@@ -1,971 +0,0 @@
-From 0ed25321cf3d2ca54dd148cc58e79712b73b9b3e Mon Sep 17 00:00:00 2001
-From: unknown <cyg_server@.(none)>
-Date: Fri, 12 Nov 2010 00:15:30 +0100
-Subject: [PATCH] Patch for Cygwin
-
----
- SConstruct             |    3 +-
- src/SConscript         |    1 +
- src/platform-cygwin.cc |  865 ++++++++++++++++++++++++++++++++++++++++++++++++
- src/platform.h         |    5 +
- src/utils.h            |    2 +-
- tools/utils.py         |    2 +
- 6 files changed, 875 insertions(+), 3 deletions(-)
- create mode 100644 src/platform-cygwin.cc
-
-diff --git a/SConstruct b/SConstruct
-index 820c1a1..7107e91 100644
---- a/SConstruct
-+++ b/SConstruct
-@@ -292,7 +292,6 @@ V8_EXTRA_FLAGS = {
-   'gcc': {
-     'all': {
-       'WARNINGFLAGS': ['-Wall',
--                       '-Werror',
-                        '-W',
-                        '-Wno-unused-parameter',
-                        '-Wnon-virtual-dtor']
-@@ -666,7 +665,7 @@ SIMPLE_OPTIONS = {
-     'help': 'the toolchain to use (%s)' % TOOLCHAIN_GUESS
-   },
-   'os': {
--    'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris'],
-+    'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris', 'cygwin'],
-     'default': OS_GUESS,
-     'help': 'the os to build for (%s)' % OS_GUESS
-   },
-diff --git a/src/SConscript b/src/SConscript
-index 8995d48..ef5485d 100755
---- a/src/SConscript
-+++ b/src/SConscript
-@@ -204,6 +204,7 @@ SOURCES = {
-   'os:android': ['platform-linux.cc', 'platform-posix.cc'],
-   'os:macos':   ['platform-macos.cc', 'platform-posix.cc'],
-   'os:solaris': ['platform-solaris.cc', 'platform-posix.cc'],
-+  'os:cygwin':  ['platform-cygwin.cc', 'platform-posix.cc'],
-   'os:nullos':  ['platform-nullos.cc'],
-   'os:win32':   ['platform-win32.cc'],
-   'mode:release': [],
-diff --git a/src/platform-cygwin.cc b/src/platform-cygwin.cc
-new file mode 100644
-index 0000000..ad0ad8c
---- /dev/null
-+++ b/src/platform-cygwin.cc
-@@ -0,0 +1,865 @@
-+// Copyright 2006-2008 the V8 project authors. All rights reserved.
-+// Redistribution and use in source and binary forms, with or without
-+// modification, are permitted provided that the following conditions are
-+// met:
-+//
-+//     * Redistributions of source code must retain the above copyright
-+//       notice, this list of conditions and the following disclaimer.
-+//     * Redistributions in binary form must reproduce the above
-+//       copyright notice, this list of conditions and the following
-+//       disclaimer in the documentation and/or other materials provided
-+//       with the distribution.
-+//     * Neither the name of Google Inc. nor the names of its
-+//       contributors may be used to endorse or promote products derived
-+//       from this software without specific prior written permission.
-+//
-+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-+
-+// Platform specific code for Cygwin goes here. For the POSIX comaptible parts
-+// the implementation is in platform-posix.cc.
-+
-+#include <pthread.h>
-+#include <semaphore.h>
-+#include <signal.h>
-+#include <sys/time.h>
-+#include <sys/resource.h>
-+#include <sys/types.h>
-+#include <stdlib.h>
-+
-+// Ubuntu Dapper requires memory pages to be marked as
-+// executable. Otherwise, OS raises an exception when executing code
-+// in that page.
-+#include <sys/types.h>  // mmap & munmap
-+#include <sys/mman.h>   // mmap & munmap
-+#include <sys/stat.h>   // open
-+#include <fcntl.h>      // open
-+#include <unistd.h>     // sysconf
-+#ifdef __GLIBC__
-+#include <execinfo.h>   // backtrace, backtrace_symbols
-+#endif  // def __GLIBC__
-+#include <strings.h>    // index
-+#include <errno.h>
-+#include <stdarg.h>
-+
-+#undef MAP_TYPE
-+
-+#include "v8.h"
-+
-+#include "platform.h"
-+#include "top.h"
-+#include "v8threads.h"
-+
-+
-+namespace v8 {
-+namespace internal {
-+
-+// 0 is never a valid thread id on Linux since tids and pids share a
-+// name space and pid 0 is reserved (see man 2 kill).
-+static const pthread_t kNoThread = (pthread_t) 0;
-+
-+
-+double ceiling(double x) {
-+  return ceil(x);
-+}
-+
-+
-+void OS::Setup() {
-+  // Seed the random number generator.
-+  // Convert the current time to a 64-bit integer first, before converting it
-+  // to an unsigned. Going directly can cause an overflow and the seed to be
-+  // set to all ones. The seed will be identical for different instances that
-+  // call this setup code within the same millisecond.
-+  uint64_t seed = static_cast<uint64_t>(TimeCurrentMillis());
-+  srandom(static_cast<unsigned int>(seed));
-+}
-+
-+
-+uint64_t OS::CpuFeaturesImpliedByPlatform() {
-+#if (defined(__VFP_FP__) && !defined(__SOFTFP__))
-+  // Here gcc is telling us that we are on an ARM and gcc is assuming that we
-+  // have VFP3 instructions.  If gcc can assume it then so can we.
-+  return 1u << VFP3;
-+#elif CAN_USE_ARMV7_INSTRUCTIONS
-+  return 1u << ARMv7;
-+#else
-+  return 0;  // Linux runs on anything.
-+#endif
-+}
-+
-+
-+#ifdef __arm__
-+bool OS::ArmCpuHasFeature(CpuFeature feature) {
-+  const char* search_string = NULL;
-+  const char* file_name = "/proc/cpuinfo";
-+  // Simple detection of VFP at runtime for Linux.
-+  // It is based on /proc/cpuinfo, which reveals hardware configuration
-+  // to user-space applications.  According to ARM (mid 2009), no similar
-+  // facility is universally available on the ARM architectures,
-+  // so it's up to individual OSes to provide such.
-+  //
-+  // This is written as a straight shot one pass parser
-+  // and not using STL string and ifstream because,
-+  // on Linux, it's reading from a (non-mmap-able)
-+  // character special device.
-+  switch (feature) {
-+    case VFP3:
-+      search_string = "vfp";
-+      break;
-+    case ARMv7:
-+      search_string = "ARMv7";
-+      break;
-+    default:
-+      UNREACHABLE();
-+  }
-+
-+  FILE* f = NULL;
-+  const char* what = search_string;
-+
-+  if (NULL == (f = fopen(file_name, "r")))
-+    return false;
-+
-+  int k;
-+  while (EOF != (k = fgetc(f))) {
-+    if (k == *what) {
-+      ++what;
-+      while ((*what != '\0') && (*what == fgetc(f))) {
-+        ++what;
-+      }
-+      if (*what == '\0') {
-+        fclose(f);
-+        return true;
-+      } else {
-+        what = search_string;
-+      }
-+    }
-+  }
-+  fclose(f);
-+
-+  // Did not find string in the proc file.
-+  return false;
-+}
-+#endif  // def __arm__
-+
-+
-+int OS::ActivationFrameAlignment() {
-+#ifdef V8_TARGET_ARCH_ARM
-+  // On EABI ARM targets this is required for fp correctness in the
-+  // runtime system.
-+  return 8;
-+#elif V8_TARGET_ARCH_MIPS
-+  return 8;
-+#endif
-+  // With gcc 4.4 the tree vectorization optimizer can generate code
-+  // that requires 16 byte alignment such as movdqa on x86.
-+  return 16;
-+}
-+
-+void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) {
-+  __asm__ __volatile__("" : : : "memory");
-+  // An x86 store acts as a release barrier.
-+  *ptr = value;
-+}
-+
-+const char* OS::LocalTimezone(double time) {
-+  if (isnan(time)) return "";
-+  time_t tv = static_cast<time_t>(floor(time/msPerSecond));
-+  struct tm* t = localtime(&tv);
-+  if (NULL == t) return "";
-+  return tzname[0];  // The location of the timezone string on Cywin.
-+}
-+
-+
-+double OS::LocalTimeOffset() {
-+  //
-+  // On Cygwin, struct tm does not contain a tm_gmtoff field.
-+  time_t utc = time(NULL);
-+  ASSERT(utc != -1);
-+  struct tm* loc = localtime(&utc);
-+  ASSERT(loc != NULL);
-+  return static_cast<double>((mktime(loc) - utc) * msPerSecond);
-+}
-+
-+
-+// We keep the lowest and highest addresses mapped as a quick way of
-+// determining that pointers are outside the heap (used mostly in assertions
-+// and verification).  The estimate is conservative, ie, not all addresses in
-+// 'allocated' space are actually allocated to our heap.  The range is
-+// [lowest, highest), inclusive on the low and and exclusive on the high end.
-+static void* lowest_ever_allocated = reinterpret_cast<void*>(-1);
-+static void* highest_ever_allocated = reinterpret_cast<void*>(0);
-+
-+
-+static void UpdateAllocatedSpaceLimits(void* address, int size) {
-+  lowest_ever_allocated = Min(lowest_ever_allocated, address);
-+  highest_ever_allocated =
-+      Max(highest_ever_allocated,
-+          reinterpret_cast<void*>(reinterpret_cast<char*>(address) + size));
-+}
-+
-+
-+bool OS::IsOutsideAllocatedSpace(void* address) {
-+  return address < lowest_ever_allocated || address >= highest_ever_allocated;
-+}
-+
-+
-+size_t OS::AllocateAlignment() {
-+  return sysconf(_SC_PAGESIZE);
-+}
-+
-+
-+void* OS::Allocate(const size_t requested,
-+                   size_t* allocated,
-+                   bool is_executable) {
-+  const size_t msize = RoundUp(requested, sysconf(_SC_PAGESIZE));
-+  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-+  void* mbase = mmap(NULL, msize, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-+  if (mbase == MAP_FAILED) {
-+    LOG(StringEvent("OS::Allocate", "mmap failed"));
-+    return NULL;
-+  }
-+  *allocated = msize;
-+  UpdateAllocatedSpaceLimits(mbase, msize);
-+  return mbase;
-+}
-+
-+
-+void OS::Free(void* address, const size_t size) {
-+  // TODO(1240712): munmap has a return value which is ignored here.
-+  int result = munmap(address, size);
-+  USE(result);
-+  ASSERT(result == 0);
-+}
-+
-+
-+#ifdef ENABLE_HEAP_PROTECTION
-+
-+void OS::Protect(void* address, size_t size) {
-+  // TODO(1240712): mprotect has a return value which is ignored here.
-+  mprotect(address, size, PROT_READ);
-+}
-+
-+
-+void OS::Unprotect(void* address, size_t size, bool is_executable) {
-+  // TODO(1240712): mprotect has a return value which is ignored here.
-+  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-+  mprotect(address, size, prot);
-+}
-+
-+#endif
-+
-+
-+void OS::Sleep(int milliseconds) {
-+  unsigned int ms = static_cast<unsigned int>(milliseconds);
-+  usleep(1000 * ms);
-+}
-+
-+
-+void OS::Abort() {
-+  // Redirect to std abort to signal abnormal program termination.
-+  abort();
-+}
-+
-+
-+void OS::DebugBreak() {
-+// TODO(lrn): Introduce processor define for runtime system (!= V8_ARCH_x,
-+//  which is the architecture of generated code).
-+#if (defined(__arm__) || defined(__thumb__)) && \
-+    defined(CAN_USE_ARMV5_INSTRUCTIONS)
-+  asm("bkpt 0");
-+#elif defined(__mips__)
-+  asm("break");
-+#else
-+  asm("int $3");
-+#endif
-+}
-+
-+
-+class PosixMemoryMappedFile : public OS::MemoryMappedFile {
-+ public:
-+  PosixMemoryMappedFile(FILE* file, void* memory, int size)
-+    : file_(file), memory_(memory), size_(size) { }
-+  virtual ~PosixMemoryMappedFile();
-+  virtual void* memory() { return memory_; }
-+ private:
-+  FILE* file_;
-+  void* memory_;
-+  int size_;
-+};
-+
-+
-+OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size,
-+    void* initial) {
-+  FILE* file = fopen(name, "w+");
-+  if (file == NULL) return NULL;
-+  int result = fwrite(initial, size, 1, file);
-+  if (result < 1) {
-+    fclose(file);
-+    return NULL;
-+  }
-+  void* memory =
-+      mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fileno(file), 0);
-+  return new PosixMemoryMappedFile(file, memory, size);
-+}
-+
-+
-+PosixMemoryMappedFile::~PosixMemoryMappedFile() {
-+  if (memory_) munmap(memory_, size_);
-+  fclose(file_);
-+}
-+
-+
-+void OS::LogSharedLibraryAddresses() {
-+#ifdef ENABLE_LOGGING_AND_PROFILING
-+  // This function assumes that the layout of the file is as follows:
-+  // hex_start_addr-hex_end_addr rwxp <unused data> [binary_file_name]
-+  // If we encounter an unexpected situation we abort scanning further entries.
-+  FILE* fp = fopen("/proc/self/maps", "r");
-+  if (fp == NULL) return;
-+
-+  // Allocate enough room to be able to store a full file name.
-+  const int kLibNameLen = FILENAME_MAX + 1;
-+  char* lib_name = reinterpret_cast<char*>(malloc(kLibNameLen));
-+
-+  // This loop will terminate once the scanning hits an EOF.
-+  while (true) {
-+    uintptr_t start, end;
-+    char attr_r, attr_w, attr_x, attr_p;
-+    // Parse the addresses and permission bits at the beginning of the line.
-+    if (fscanf(fp, "%" V8PRIxPTR "-%" V8PRIxPTR, &start, &end) != 2) break;
-+    if (fscanf(fp, " %c%c%c%c", &attr_r, &attr_w, &attr_x, &attr_p) != 4) break;
-+
-+    int c;
-+    if (attr_r == 'r' && attr_w != 'w' && attr_x == 'x') {
-+      // Found a read-only executable entry. Skip characters until we reach
-+      // the beginning of the filename or the end of the line.
-+      do {
-+        c = getc(fp);
-+      } while ((c != EOF) && (c != '\n') && (c != '/'));
-+      if (c == EOF) break;  // EOF: Was unexpected, just exit.
-+
-+      // Process the filename if found.
-+      if (c == '/') {
-+        ungetc(c, fp);  // Push the '/' back into the stream to be read below.
-+
-+        // Read to the end of the line. Exit if the read fails.
-+        if (fgets(lib_name, kLibNameLen, fp) == NULL) break;
-+
-+        // Drop the newline character read by fgets. We do not need to check
-+        // for a zero-length string because we know that we at least read the
-+        // '/' character.
-+        lib_name[strlen(lib_name) - 1] = '\0';
-+      } else {
-+        // No library name found, just record the raw address range.
-+        snprintf(lib_name, kLibNameLen,
-+                 "%08" V8PRIxPTR "-%08" V8PRIxPTR, start, end);
-+      }
-+      LOG(SharedLibraryEvent(lib_name, start, end));
-+    } else {
-+      // Entry not describing executable data. Skip to end of line to setup
-+      // reading the next entry.
-+      do {
-+        c = getc(fp);
-+      } while ((c != EOF) && (c != '\n'));
-+      if (c == EOF) break;
-+    }
-+  }
-+  free(lib_name);
-+  fclose(fp);
-+#endif
-+}
-+
-+
-+void OS::SignalCodeMovingGC() {
-+}
-+
-+
-+int OS::StackWalk(Vector<OS::StackFrame> frames) {
-+  // backtrace is a glibc extension.
-+#ifdef __GLIBC__
-+  int frames_size = frames.length();
-+  ScopedVector<void*> addresses(frames_size);
-+
-+  int frames_count = backtrace(addresses.start(), frames_size);
-+
-+  char** symbols = backtrace_symbols(addresses.start(), frames_count);
-+  if (symbols == NULL) {
-+    return kStackWalkError;
-+  }
-+
-+  for (int i = 0; i < frames_count; i++) {
-+    frames[i].address = addresses[i];
-+    // Format a text representation of the frame based on the information
-+    // available.
-+    SNPrintF(MutableCStrVector(frames[i].text, kStackWalkMaxTextLen),
-+             "%s",
-+             symbols[i]);
-+    // Make sure line termination is in place.
-+    frames[i].text[kStackWalkMaxTextLen - 1] = '\0';
-+  }
-+
-+  free(symbols);
-+
-+  return frames_count;
-+#else  // ndef __GLIBC__
-+  return 0;
-+#endif  // ndef __GLIBC__
-+}
-+
-+
-+// Constants used for mmap.
-+static const int kMmapFd = -1;
-+static const int kMmapFdOffset = 0;
-+
-+
-+VirtualMemory::VirtualMemory(size_t size) {
-+  address_ = mmap(NULL, size, PROT_NONE,
-+                  MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE,
-+                  kMmapFd, kMmapFdOffset);
-+  size_ = size;
-+}
-+
-+
-+VirtualMemory::~VirtualMemory() {
-+  if (IsReserved()) {
-+    if (0 == munmap(address(), size())) address_ = MAP_FAILED;
-+  }
-+}
-+
-+
-+bool VirtualMemory::IsReserved() {
-+  return address_ != MAP_FAILED;
-+}
-+
-+
-+bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) {
-+  int prot = PROT_READ | PROT_WRITE | (is_executable ? PROT_EXEC : 0);
-+
-+#ifdef HAS_MAP_FIXED
-+  if (MAP_FAILED == mmap(address, size, prot,
-+                         MAP_PRIVATE | MAP_ANONYMOUS, // | MAP_FIXED, - Cygwin doesn't have MAP_FIXED
-+                         kMmapFd, kMmapFdOffset)) {
-+    return false;
-+  }
-+#else
-+  if (mprotect(address, size, prot) != 0) {
-+    return false;
-+  }
-+#endif
-+
-+  UpdateAllocatedSpaceLimits(address, size);
-+  return true;
-+}
-+
-+
-+bool VirtualMemory::Uncommit(void* address, size_t size) {
-+  return mmap(address, size, PROT_NONE,
-+              MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, // | MAP_FIXED, - Cygwin doesn't have MAP_FIXED
-+              kMmapFd, kMmapFdOffset) != MAP_FAILED;
-+}
-+
-+
-+class ThreadHandle::PlatformData : public Malloced {
-+ public:
-+  explicit PlatformData(ThreadHandle::Kind kind) {
-+    Initialize(kind);
-+  }
-+
-+  void Initialize(ThreadHandle::Kind kind) {
-+    switch (kind) {
-+      case ThreadHandle::SELF: thread_ = pthread_self(); break;
-+      case ThreadHandle::INVALID: thread_ = kNoThread; break;
-+    }
-+  }
-+
-+  pthread_t thread_;  // Thread handle for pthread.
-+};
-+
-+
-+ThreadHandle::ThreadHandle(Kind kind) {
-+  data_ = new PlatformData(kind);
-+}
-+
-+
-+void ThreadHandle::Initialize(ThreadHandle::Kind kind) {
-+  data_->Initialize(kind);
-+}
-+
-+
-+ThreadHandle::~ThreadHandle() {
-+  delete data_;
-+}
-+
-+
-+bool ThreadHandle::IsSelf() const {
-+  return pthread_equal(data_->thread_, pthread_self());
-+}
-+
-+
-+bool ThreadHandle::IsValid() const {
-+  return data_->thread_ != kNoThread;
-+}
-+
-+
-+Thread::Thread() : ThreadHandle(ThreadHandle::INVALID) {
-+}
-+
-+
-+Thread::~Thread() {
-+}
-+
-+
-+static void* ThreadEntry(void* arg) {
-+  Thread* thread = reinterpret_cast<Thread*>(arg);
-+  // This is also initialized by the first argument to pthread_create() but we
-+  // don't know which thread will run first (the original thread or the new
-+  // one) so we initialize it here too.
-+  thread->thread_handle_data()->thread_ = pthread_self();
-+  ASSERT(thread->IsValid());
-+  thread->Run();
-+  return NULL;
-+}
-+
-+
-+void Thread::Start() {
-+  pthread_create(&thread_handle_data()->thread_, NULL, ThreadEntry, this);
-+  ASSERT(IsValid());
-+}
-+
-+
-+void Thread::Join() {
-+  pthread_join(thread_handle_data()->thread_, NULL);
-+}
-+
-+
-+Thread::LocalStorageKey Thread::CreateThreadLocalKey() {
-+  pthread_key_t key;
-+  int result = pthread_key_create(&key, NULL);
-+  USE(result);
-+  ASSERT(result == 0);
-+  return static_cast<LocalStorageKey>(key);
-+}
-+
-+
-+void Thread::DeleteThreadLocalKey(LocalStorageKey key) {
-+  pthread_key_t pthread_key = static_cast<pthread_key_t>(key);
-+  int result = pthread_key_delete(pthread_key);
-+  USE(result);
-+  ASSERT(result == 0);
-+}
-+
-+
-+void* Thread::GetThreadLocal(LocalStorageKey key) {
-+  pthread_key_t pthread_key = static_cast<pthread_key_t>(key);
-+  return pthread_getspecific(pthread_key);
-+}
-+
-+
-+void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
-+  pthread_key_t pthread_key = static_cast<pthread_key_t>(key);
-+  pthread_setspecific(pthread_key, value);
-+}
-+
-+
-+void Thread::YieldCPU() {
-+  sched_yield();
-+}
-+
-+
-+class CygwinMutex : public Mutex {
-+ public:
-+
-+  CygwinMutex() {
-+    pthread_mutexattr_t attrs;
-+    memset(&attrs, 0, sizeof(attrs));
-+
-+    int result = pthread_mutexattr_init(&attrs);
-+    ASSERT(result == 0);
-+    result = pthread_mutexattr_settype(&attrs, PTHREAD_MUTEX_RECURSIVE);
-+    ASSERT(result == 0);
-+    result = pthread_mutex_init(&mutex_, &attrs);
-+    ASSERT(result == 0);
-+  }
-+
-+  virtual ~CygwinMutex() { pthread_mutex_destroy(&mutex_); }
-+
-+  virtual int Lock() {
-+    int result = pthread_mutex_lock(&mutex_);
-+    return result;
-+  }
-+
-+  virtual int Unlock() {
-+    int result = pthread_mutex_unlock(&mutex_);
-+    return result;
-+  }
-+
-+ private:
-+  pthread_mutex_t mutex_;   // Pthread mutex for POSIX platforms.
-+};
-+
-+
-+Mutex* OS::CreateMutex() {
-+  return new CygwinMutex();
-+}
-+
-+
-+class CygwinSemaphore : public Semaphore {
-+ public:
-+  explicit CygwinSemaphore(int count) {  sem_init(&sem_, 0, count); }
-+  virtual ~CygwinSemaphore() { sem_destroy(&sem_); }
-+
-+  virtual void Wait();
-+  virtual bool Wait(int timeout);
-+  virtual void Signal() { sem_post(&sem_); }
-+ private:
-+  sem_t sem_;
-+};
-+
-+
-+void CygwinSemaphore::Wait() {
-+  while (true) {
-+    int result = sem_wait(&sem_);
-+    if (result == 0) return;  // Successfully got semaphore.
-+    CHECK(result == -1 && errno == EINTR);  // Signal caused spurious wakeup.
-+  }
-+}
-+
-+
-+#ifndef TIMEVAL_TO_TIMESPEC
-+#define TIMEVAL_TO_TIMESPEC(tv, ts) do {                            \
-+    (ts)->tv_sec = (tv)->tv_sec;                                    \
-+    (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
-+} while (false)
-+#endif
-+
-+
-+bool CygwinSemaphore::Wait(int timeout) {
-+  const long kOneSecondMicros = 1000000;  // NOLINT
-+
-+  // Split timeout into second and nanosecond parts.
-+  struct timeval delta;
-+  delta.tv_usec = timeout % kOneSecondMicros;
-+  delta.tv_sec = timeout / kOneSecondMicros;
-+
-+  struct timeval current_time;
-+  // Get the current time.
-+  if (gettimeofday(&current_time, NULL) == -1) {
-+    return false;
-+  }
-+
-+  // Calculate time for end of timeout.
-+  struct timeval end_time;
-+  timeradd(&current_time, &delta, &end_time);
-+
-+  struct timespec ts;
-+  TIMEVAL_TO_TIMESPEC(&end_time, &ts);
-+  // Wait for semaphore signalled or timeout.
-+  while (true) {
-+    int result = sem_timedwait(&sem_, &ts);
-+    if (result == 0) return true;  // Successfully got semaphore.
-+    if (result > 0) {
-+      // For glibc prior to 2.3.4 sem_timedwait returns the error instead of -1.
-+      errno = result;
-+      result = -1;
-+    }
-+    if (result == -1 && errno == ETIMEDOUT) return false;  // Timeout.
-+    CHECK(result == -1 && errno == EINTR);  // Signal caused spurious wakeup.
-+  }
-+}
-+
-+
-+Semaphore* OS::CreateSemaphore(int count) {
-+  return new CygwinSemaphore(count);
-+}
-+
-+
-+#ifdef ENABLE_LOGGING_AND_PROFILING
-+
-+static Sampler* active_sampler_ = NULL;
-+static pthread_t vm_thread_ = 0;
-+
-+
-+#if !defined(__GLIBC__) && (defined(__arm__) || defined(__thumb__))
-+// Android runs a fairly new Linux kernel, so signal info is there,
-+// but the C library doesn't have the structs defined.
-+
-+struct sigcontext {
-+  uint32_t trap_no;
-+  uint32_t error_code;
-+  uint32_t oldmask;
-+  uint32_t gregs[16];
-+  uint32_t arm_cpsr;
-+  uint32_t fault_address;
-+};
-+typedef uint32_t __sigset_t;
-+typedef struct sigcontext mcontext_t;
-+typedef struct ucontext {
-+  uint32_t uc_flags;
-+  struct ucontext* uc_link;
-+  stack_t uc_stack;
-+  mcontext_t uc_mcontext;
-+  __sigset_t uc_sigmask;
-+} ucontext_t;
-+enum ArmRegisters {R15 = 15, R13 = 13, R11 = 11};
-+
-+#endif
-+
-+
-+// A function that determines if a signal handler is called in the context
-+// of a VM thread.
-+//
-+// The problem is that SIGPROF signal can be delivered to an arbitrary thread
-+// (see http://code.google.com/p/google-perftools/issues/detail?id=106#c2)
-+// So, if the signal is being handled in the context of a non-VM thread,
-+// it means that the VM thread is running, and trying to sample its stack can
-+// cause a crash.
-+static inline bool IsVmThread() {
-+  // In the case of a single VM thread, this check is enough.
-+  if (pthread_equal(pthread_self(), vm_thread_)) return true;
-+  // If there are multiple threads that use VM, they must have a thread id
-+  // stored in TLS. To verify that the thread is really executing VM,
-+  // we check Top's data. Having that ThreadManager::RestoreThread first
-+  // restores ThreadLocalTop from TLS, and only then erases the TLS value,
-+  // reading Top::thread_id() should not be affected by races.
-+  if (ThreadManager::HasId() && !ThreadManager::IsArchived() &&
-+      ThreadManager::CurrentId() == Top::thread_id()) {
-+    return true;
-+  }
-+  return false;
-+}
-+
-+
-+static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
-+#ifndef V8_HOST_ARCH_MIPS
-+  USE(info);
-+  if (signal != SIGPROF) return;
-+  if (active_sampler_ == NULL) return;
-+
-+  TickSample sample_obj;
-+  TickSample* sample = CpuProfiler::TickSampleEvent();
-+  if (sample == NULL) sample = &sample_obj;
-+
-+  // We always sample the VM state.
-+  sample->state = VMState::current_state();
-+
-+#if 0
-+  // If profiling, we extract the current pc and sp.
-+  if (active_sampler_->IsProfiling()) {
-+    // Extracting the sample from the context is extremely machine dependent.
-+    ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
-+    mcontext_t& mcontext = ucontext->uc_mcontext;
-+#if V8_HOST_ARCH_IA32
-+    sample->pc = reinterpret_cast<Address>(mcontext.gregs[REG_EIP]);
-+    sample->sp = reinterpret_cast<Address>(mcontext.gregs[REG_ESP]);
-+    sample->fp = reinterpret_cast<Address>(mcontext.gregs[REG_EBP]);
-+#elif V8_HOST_ARCH_X64
-+    sample->pc = reinterpret_cast<Address>(mcontext.gregs[REG_RIP]);
-+    sample->sp = reinterpret_cast<Address>(mcontext.gregs[REG_RSP]);
-+    sample->fp = reinterpret_cast<Address>(mcontext.gregs[REG_RBP]);
-+#elif V8_HOST_ARCH_ARM
-+// An undefined macro evaluates to 0, so this applies to Android's Bionic also.
-+#if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
-+    sample->pc = reinterpret_cast<Address>(mcontext.gregs[R15]);
-+    sample->sp = reinterpret_cast<Address>(mcontext.gregs[R13]);
-+    sample->fp = reinterpret_cast<Address>(mcontext.gregs[R11]);
-+#else
-+    sample->pc = reinterpret_cast<Address>(mcontext.arm_pc);
-+    sample->sp = reinterpret_cast<Address>(mcontext.arm_sp);
-+    sample->fp = reinterpret_cast<Address>(mcontext.arm_fp);
-+#endif
-+#elif V8_HOST_ARCH_MIPS
-+    // Implement this on MIPS.
-+    UNIMPLEMENTED();
-+#endif
-+    if (IsVmThread()) {
-+      active_sampler_->SampleStack(sample);
-+    }
-+  }
-+#endif
-+
-+  active_sampler_->Tick(sample);
-+#endif
-+}
-+
-+
-+class Sampler::PlatformData : public Malloced {
-+ public:
-+  PlatformData() {
-+    signal_handler_installed_ = false;
-+  }
-+
-+  bool signal_handler_installed_;
-+  struct sigaction old_signal_handler_;
-+  struct itimerval old_timer_value_;
-+};
-+
-+
-+Sampler::Sampler(int interval, bool profiling)
-+    : interval_(interval),
-+      profiling_(profiling),
-+      synchronous_(profiling),
-+      active_(false) {
-+  data_ = new PlatformData();
-+}
-+
-+
-+Sampler::~Sampler() {
-+  delete data_;
-+}
-+
-+
-+void Sampler::Start() {
-+  // There can only be one active sampler at the time on POSIX
-+  // platforms.
-+  if (active_sampler_ != NULL) return;
-+
-+  vm_thread_ = pthread_self();
-+
-+  // Request profiling signals.
-+  struct sigaction sa;
-+  sa.sa_sigaction = ProfilerSignalHandler;
-+  sigemptyset(&sa.sa_mask);
-+  sa.sa_flags = SA_SIGINFO;
-+  if (sigaction(SIGPROF, &sa, &data_->old_signal_handler_) != 0) return;
-+  data_->signal_handler_installed_ = true;
-+
-+  // Set the itimer to generate a tick for each interval.
-+  itimerval itimer;
-+  itimer.it_interval.tv_sec = interval_ / 1000;
-+  itimer.it_interval.tv_usec = (interval_ % 1000) * 1000;
-+  itimer.it_value.tv_sec = itimer.it_interval.tv_sec;
-+  itimer.it_value.tv_usec = itimer.it_interval.tv_usec;
-+  setitimer(ITIMER_PROF, &itimer, &data_->old_timer_value_);
-+
-+  // Set this sampler as the active sampler.
-+  active_sampler_ = this;
-+  active_ = true;
-+}
-+
-+
-+void Sampler::Stop() {
-+  // Restore old signal handler
-+  if (data_->signal_handler_installed_) {
-+    setitimer(ITIMER_PROF, &data_->old_timer_value_, NULL);
-+    sigaction(SIGPROF, &data_->old_signal_handler_, 0);
-+    data_->signal_handler_installed_ = false;
-+  }
-+
-+  // This sampler is no longer the active sampler.
-+  active_sampler_ = NULL;
-+  active_ = false;
-+}
-+
-+
-+#endif  // ENABLE_LOGGING_AND_PROFILING
-+
-+} }  // namespace v8::internal
-diff --git a/src/platform.h b/src/platform.h
-index 42e6eae..c4ef230 100644
---- a/src/platform.h
-+++ b/src/platform.h
-@@ -367,6 +367,7 @@ class ThreadHandle {
- 
- class Thread: public ThreadHandle {
-  public:
-+#ifndef __CYGWIN__
-   // Opaque data type for thread-local storage keys.
-   // LOCAL_STORAGE_KEY_MIN_VALUE and LOCAL_STORAGE_KEY_MAX_VALUE are specified
-   // to ensure that enumeration type has correct value range (see Issue 830 for
-@@ -375,6 +376,10 @@ class Thread: public ThreadHandle {
-     LOCAL_STORAGE_KEY_MIN_VALUE = kMinInt,
-     LOCAL_STORAGE_KEY_MAX_VALUE = kMaxInt
-   };
-+#else
-+  typedef void *LocalStorageKey;
-+#endif
-+
- 
-   // Create new thread.
-   Thread();
-diff --git a/src/utils.h b/src/utils.h
-index ffdb639..0521767 100644
---- a/src/utils.h
-+++ b/src/utils.h
-@@ -963,7 +963,7 @@ inline Dest BitCast(const Source& source) {
- }
- 
- template <class Dest, class Source>
--inline Dest BitCast(Source* source) {
-+inline Dest BitCast(Source*& source) {
-   return BitCast<Dest>(reinterpret_cast<uintptr_t>(source));
- }
- 
-diff --git a/tools/utils.py b/tools/utils.py
-index 8083091..7733157 100644
---- a/tools/utils.py
-+++ b/tools/utils.py
-@@ -59,6 +59,8 @@ def GuessOS():
-     return 'openbsd'
-   elif id == 'SunOS':
-     return 'solaris'
-+  elif id.find('CYGWIN') >= 0:
-+    return 'cygwin'
-   else:
-     return None
- 
--- 
-1.7.2
-

deps/v8/0003-Fix-Solaris-build.patch

@@ -1,103 +0,0 @@
-From 2a40926a1e1c8d385afefc1fe5255e21cc1a8f1e Mon Sep 17 00:00:00 2001
-From: Ryan Dahl <ry@tinyclouds.org>
-Date: Thu, 16 Dec 2010 22:20:44 +0000
-Subject: [PATCH] Fix Solaris build
-
----
- src/platform-solaris.cc |   49 ++++++++++++++++++++++++++++++++++++----------
- src/v8utils.h           |    1 +
- 2 files changed, 39 insertions(+), 11 deletions(-)
-
-diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
-index f84e80d..b302c59 100644
---- a/src/platform-solaris.cc
-+++ b/src/platform-solaris.cc
-@@ -45,6 +45,7 @@
- #include <errno.h>
- #include <ieeefp.h>  // finite()
- #include <signal.h>  // sigemptyset(), etc
-+#include <sys/kdi_regs.h>
- 
- 
- #undef MAP_TYPE
-@@ -481,6 +482,16 @@ class SolarisMutex : public Mutex {
- 
-   int Unlock() { return pthread_mutex_unlock(&mutex_); }
- 
-+  virtual bool TryLock() {
-+    int result = pthread_mutex_trylock(&mutex_);
-+    // Return false if the lock is busy and locking failed.
-+    if (result == EBUSY) {
-+      return false;
-+    }
-+    ASSERT(result == 0);  // Verify no other errors.
-+    return true;
-+  }
-+
-  private:
-   pthread_mutex_t mutex_;
- };
-@@ -572,21 +583,37 @@ Semaphore* OS::CreateSemaphore(int count) {
- #ifdef ENABLE_LOGGING_AND_PROFILING
- 
- static Sampler* active_sampler_ = NULL;
-+static pthread_t vm_tid_ = 0;
-+
- 
- static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
-   USE(info);
-   if (signal != SIGPROF) return;
--  if (active_sampler_ == NULL) return;
--
--  TickSample sample;
--  sample.pc = 0;
--  sample.sp = 0;
--  sample.fp = 0;
--
--  // We always sample the VM state.
--  sample.state = VMState::current_state();
--
--  active_sampler_->Tick(&sample);
-+  if (active_sampler_ == NULL || !active_sampler_->IsActive()) return;
-+  if (vm_tid_ != pthread_self()) return;
-+
-+  TickSample sample_obj;
-+  TickSample* sample = CpuProfiler::TickSampleEvent();
-+  if (sample == NULL) sample = &sample_obj;
-+
-+  // Extracting the sample from the context is extremely machine dependent.
-+  ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
-+  mcontext_t& mcontext = ucontext->uc_mcontext;
-+  sample->state = Top::current_vm_state();
-+
-+#if V8_HOST_ARCH_IA32
-+  sample->pc = reinterpret_cast<Address>(mcontext.gregs[KDIREG_EIP]);
-+  sample->sp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_ESP]);
-+  sample->fp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_EBP]);
-+#elif V8_HOST_ARCH_X64
-+  sample->pc = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RIP]);
-+  sample->sp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RSP]);
-+  sample->fp = reinterpret_cast<Address>(mcontext.gregs[KDIREG_RBP]);
-+#else
-+  UNIMPLEMENTED();
-+#endif
-+  active_sampler_->SampleStack(sample);
-+  active_sampler_->Tick(sample);
- }
- 
- 
-diff --git a/src/v8utils.h b/src/v8utils.h
-index f6ed520..59b3898 100644
---- a/src/v8utils.h
-+++ b/src/v8utils.h
-@@ -29,6 +29,7 @@
- #define V8_V8UTILS_H_
- 
- #include "utils.h"
-+#include <stdarg.h>
- 
- namespace v8 {
- namespace internal {
--- 
-1.6.3.3
-

deps/v8/ChangeLog

@@ -1,3 +1,57 @@
+2011-01-17: Version 3.0.8
+
+        Exposed heap size limit to the heap statistics gathered by
+        the GetHeapStatistics API. 
+
+        Wrapped external pointers more carefully (issue 1037).
+
+        Hardened the implementation of error objects to avoid setters
+        intercepting the properties set then throwing an error.
+
+        Avoided trashing the FPSCR when calculating Math.floor on ARM.
+
+        Performance improvements on the IA32 platform.
+
+
+2011-01-10: Version 3.0.7
+
+        Stopped calling inherited setters when creating object literals
+        (issue 1015).
+
+        Changed interpretation of malformed \c? escapes in RegExp to match
+        JSC.
+
+        Enhanced the command-line debugger interface and fixed some minor
+        bugs in the debugger.
+
+        Performance improvements on the IA32 platform.
+
+
+2011-01-05: Version 3.0.6
+
+        Allowed getters and setters on JSArray elements (issue 900).
+
+        Stopped JSON objects from hitting inherited setters (part of
+        issue 1015).
+
+        Allowed numbers and strings as names of getters/setters in object
+        initializer (issue 820).
+
+        Added use_system_v8 option to gyp (off by default), to make it easier
+        for Linux distributions to ship with system-provided V8 library.
+
+        Exported external array data accessors (issue 1016).
+
+        Added labelled thread names to help with debugging (on Linux).
+
+
+2011-01-03: Version 3.0.5
+
+        Fixed a couple of cast errors for gcc-3.4.3.
+
+        Performance improvements in GC and IA32 code generator.
+
+
 2010-12-21: Version 3.0.4
 
         Added Date::ResetCache() to the API so that the cached values in the
@@ -152,7 +206,7 @@
         Allowed forcing the use of a simulator from the build script
         independently of the host architecture.
 
-        Fixed FreeBSD port (Issue 912).
+        Fixed FreeBSD port (issue 912).
 
         Made windows-tick-processor respect D8_PATH.
 

deps/v8/SConstruct

@@ -662,6 +662,8 @@ def GuessVisibility(os, toolchain):
   if os == 'win32' and toolchain == 'gcc':
     # MinGW can't do it.
     return 'default'
+  elif os == 'solaris':
+    return 'default'
   else:
     return 'hidden'
 
@@ -679,7 +681,7 @@ SIMPLE_OPTIONS = {
     'help': 'the toolchain to use (%s)' % TOOLCHAIN_GUESS
   },
   'os': {
-    'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris', 'cygwin'],
+    'values': ['freebsd', 'linux', 'macos', 'win32', 'android', 'openbsd', 'solaris'],
     'default': OS_GUESS,
     'help': 'the os to build for (%s)' % OS_GUESS
   },

deps/v8/include/v8.h

@@ -1651,9 +1651,9 @@ class Object : public Value {
    *       the backing store is preserved while V8 has a reference.
    */
   V8EXPORT void SetIndexedPropertiesToPixelData(uint8_t* data, int length);
-  bool HasIndexedPropertiesInPixelData();
-  uint8_t* GetIndexedPropertiesPixelData();
-  int GetIndexedPropertiesPixelDataLength();
+  V8EXPORT bool HasIndexedPropertiesInPixelData();
+  V8EXPORT uint8_t* GetIndexedPropertiesPixelData();
+  V8EXPORT int GetIndexedPropertiesPixelDataLength();
 
   /**
    * Set the backing store of the indexed properties to be managed by the
@@ -1666,10 +1666,10 @@ class Object : public Value {
       void* data,
       ExternalArrayType array_type,
       int number_of_elements);
-  bool HasIndexedPropertiesInExternalArrayData();
-  void* GetIndexedPropertiesExternalArrayData();
-  ExternalArrayType GetIndexedPropertiesExternalArrayDataType();
-  int GetIndexedPropertiesExternalArrayDataLength();
+  V8EXPORT bool HasIndexedPropertiesInExternalArrayData();
+  V8EXPORT void* GetIndexedPropertiesExternalArrayData();
+  V8EXPORT ExternalArrayType GetIndexedPropertiesExternalArrayDataType();
+  V8EXPORT int GetIndexedPropertiesExternalArrayDataLength();
 
   V8EXPORT static Local<Object> New();
   static inline Object* Cast(Value* obj);
@@ -2515,6 +2515,7 @@ class V8EXPORT HeapStatistics {
   size_t total_heap_size() { return total_heap_size_; }
   size_t total_heap_size_executable() { return total_heap_size_executable_; }
   size_t used_heap_size() { return used_heap_size_; }
+  size_t heap_size_limit() { return heap_size_limit_; }
 
  private:
   void set_total_heap_size(size_t size) { total_heap_size_ = size; }
@@ -2522,10 +2523,12 @@ class V8EXPORT HeapStatistics {
     total_heap_size_executable_ = size;
   }
   void set_used_heap_size(size_t size) { used_heap_size_ = size; }
+  void set_heap_size_limit(size_t size) { heap_size_limit_ = size; }
 
   size_t total_heap_size_;
   size_t total_heap_size_executable_;
   size_t used_heap_size_;
+  size_t heap_size_limit_;
 
   friend class V8;
 };
@@ -3076,6 +3079,18 @@ class V8EXPORT Context {
    * Returns a persistent handle to the newly allocated context. This
    * persistent handle has to be disposed when the context is no
    * longer used so the context can be garbage collected.
+   *
+   * \param extensions An optional extension configuration containing
+   * the extensions to be installed in the newly created context.
+   *
+   * \param global_template An optional object template from which the
+   * global object for the newly created context will be created.
+   *
+   * \param global_object An optional global object to be reused for
+   * the newly created context. This global object must have been
+   * created by a previous call to Context::New with the same global
+   * template. The state of the global object will be completely reset
+   * and only object identify will remain.
    */
   static Persistent<Context> New(
       ExtensionConfiguration* extensions = NULL,
@@ -3338,10 +3353,10 @@ const int kSmiTag = 0;
 const int kSmiTagSize = 1;
 const intptr_t kSmiTagMask = (1 << kSmiTagSize) - 1;
 
-template <size_t ptr_size> struct SmiConstants;
+template <size_t ptr_size> struct SmiTagging;
 
 // Smi constants for 32-bit systems.
-template <> struct SmiConstants<4> {
+template <> struct SmiTagging<4> {
   static const int kSmiShiftSize = 0;
   static const int kSmiValueSize = 31;
   static inline int SmiToInt(internal::Object* value) {
@@ -3349,10 +3364,15 @@ template <> struct SmiConstants<4> {
     // Throw away top 32 bits and shift down (requires >> to be sign extending).
     return static_cast<int>(reinterpret_cast<intptr_t>(value)) >> shift_bits;
   }
+
+  // For 32-bit systems any 2 bytes aligned pointer can be encoded as smi
+  // with a plain reinterpret_cast.
+  static const intptr_t kEncodablePointerMask = 0x1;
+  static const int kPointerToSmiShift = 0;
 };
 
 // Smi constants for 64-bit systems.
-template <> struct SmiConstants<8> {
+template <> struct SmiTagging<8> {
   static const int kSmiShiftSize = 31;
   static const int kSmiValueSize = 32;
   static inline int SmiToInt(internal::Object* value) {
@@ -3360,10 +3380,26 @@ template <> struct SmiConstants<8> {
     // Shift down and throw away top 32 bits.
     return static_cast<int>(reinterpret_cast<intptr_t>(value) >> shift_bits);
   }
+
+  // To maximize the range of pointers that can be encoded
+  // in the available 32 bits, we require them to be 8 bytes aligned.
+  // This gives 2 ^ (32 + 3) = 32G address space covered.
+  // It might be not enough to cover stack allocated objects on some platforms.
+  static const int kPointerAlignment = 3;
+
+  static const intptr_t kEncodablePointerMask =
+      ~(intptr_t(0xffffffff) << kPointerAlignment);
+
+  static const int kPointerToSmiShift =
+      kSmiTagSize + kSmiShiftSize - kPointerAlignment;
 };
 
-const int kSmiShiftSize = SmiConstants<kApiPointerSize>::kSmiShiftSize;
-const int kSmiValueSize = SmiConstants<kApiPointerSize>::kSmiValueSize;
+typedef SmiTagging<kApiPointerSize> PlatformSmiTagging;
+const int kSmiShiftSize = PlatformSmiTagging::kSmiShiftSize;
+const int kSmiValueSize = PlatformSmiTagging::kSmiValueSize;
+const intptr_t kEncodablePointerMask =
+    PlatformSmiTagging::kEncodablePointerMask;
+const int kPointerToSmiShift = PlatformSmiTagging::kPointerToSmiShift;
 
 template <size_t ptr_size> struct InternalConstants;
 
@@ -3411,7 +3447,7 @@ class Internals {
   }
 
   static inline int SmiValue(internal::Object* value) {
-    return SmiConstants<kApiPointerSize>::SmiToInt(value);
+    return PlatformSmiTagging::SmiToInt(value);
   }
 
   static inline int GetInstanceType(internal::Object* obj) {
@@ -3420,9 +3456,14 @@ class Internals {
     return ReadField<uint8_t>(map, kMapInstanceTypeOffset);
   }
 
+  static inline void* GetExternalPointerFromSmi(internal::Object* value) {
+    const intptr_t address = reinterpret_cast<intptr_t>(value);
+    return reinterpret_cast<void*>(address >> kPointerToSmiShift);
+  }
+
   static inline void* GetExternalPointer(internal::Object* obj) {
     if (HasSmiTag(obj)) {
-      return obj;
+      return GetExternalPointerFromSmi(obj);
     } else if (GetInstanceType(obj) == kProxyType) {
       return ReadField<void*>(obj, kProxyProxyOffset);
     } else {

deps/v8/src/SConscript

@@ -1,4 +1,4 @@
-# Copyright 2008 the V8 project authors. All rights reserved.
+# Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ -85,6 +85,7 @@ SOURCES = {
     jsregexp.cc
     jump-target.cc
     lithium-allocator.cc
+    lithium.cc
     liveedit.cc
     log-utils.cc
     log.cc
@@ -211,6 +212,8 @@ SOURCES = {
     x64/full-codegen-x64.cc
     x64/ic-x64.cc
     x64/jump-target-x64.cc
+    x64/lithium-x64.cc
+    x64/lithium-codegen-x64.cc
     x64/macro-assembler-x64.cc
     x64/regexp-macro-assembler-x64.cc
     x64/register-allocator-x64.cc
@@ -225,14 +228,14 @@ SOURCES = {
   'os:android': ['platform-linux.cc', 'platform-posix.cc'],
   'os:macos':   ['platform-macos.cc', 'platform-posix.cc'],
   'os:solaris': ['platform-solaris.cc', 'platform-posix.cc'],
-  'os:cygwin':  ['platform-cygwin.cc', 'platform-posix.cc'],
   'os:nullos':  ['platform-nullos.cc'],
   'os:win32':   ['platform-win32.cc'],
   'mode:release': [],
   'mode:debug': [
-    'objects-debug.cc', 'prettyprinter.cc', 'regexp-macro-assembler-tracer.cc'
+    'objects-debug.cc', 'objects-printer.cc', 'prettyprinter.cc',
+    'regexp-macro-assembler-tracer.cc'
   ],
-  'objectprint:on': ['objects-debug.cc']
+  'objectprint:on': ['objects-printer.cc']
 }
 
 

deps/v8/src/accessors.cc

@@ -126,8 +126,8 @@ MaybeObject* Accessors::ArraySetLength(JSObject* object, Object* value, void*) {
       // This means one of the object's prototypes is a JSArray and
       // the object does not have a 'length' property.
       // Calling SetProperty causes an infinite loop.
-      return object->IgnoreAttributesAndSetLocalProperty(Heap::length_symbol(),
-                                                         value, NONE);
+      return object->SetLocalPropertyIgnoreAttributes(Heap::length_symbol(),
+                                                      value, NONE);
     }
   }
   return Top::Throw(*Factory::NewRangeError("invalid_array_length",
@@ -775,7 +775,7 @@ MaybeObject* Accessors::FunctionGetArguments(Object* object, void*) {
         if (index >= 0) {
           Handle<Object> arguments =
               Handle<Object>(frame->GetExpression(index));
-          if (!arguments->IsTheHole()) return *arguments;
+          if (!arguments->IsArgumentsMarker()) return *arguments;
         }
 
         // If there isn't an arguments variable in the stack, we need to

deps/v8/src/api.cc

@@ -3266,18 +3266,35 @@ void v8::Object::SetInternalField(int index, v8::Handle<Value> value) {
 }
 
 
+static bool CanBeEncodedAsSmi(void* ptr) {
+  const intptr_t address = reinterpret_cast<intptr_t>(ptr);
+  return ((address & i::kEncodablePointerMask) == 0);
+}
+
+
+static i::Smi* EncodeAsSmi(void* ptr) {
+  ASSERT(CanBeEncodedAsSmi(ptr));
+  const intptr_t address = reinterpret_cast<intptr_t>(ptr);
+  i::Smi* result = reinterpret_cast<i::Smi*>(address << i::kPointerToSmiShift);
+  ASSERT(i::Internals::HasSmiTag(result));
+  ASSERT_EQ(result, i::Smi::FromInt(result->value()));
+  ASSERT_EQ(ptr, i::Internals::GetExternalPointerFromSmi(result));
+  return result;
+}
+
+
 void v8::Object::SetPointerInInternalField(int index, void* value) {
   ENTER_V8;
-  i::Object* as_object = reinterpret_cast<i::Object*>(value);
-  if (as_object->IsSmi()) {
-    Utils::OpenHandle(this)->SetInternalField(index, as_object);
-    return;
+  if (CanBeEncodedAsSmi(value)) {
+    Utils::OpenHandle(this)->SetInternalField(index, EncodeAsSmi(value));
+  } else {
+    HandleScope scope;
+    i::Handle<i::Proxy> proxy =
+        i::Factory::NewProxy(reinterpret_cast<i::Address>(value), i::TENURED);
+    if (!proxy.is_null())
+        Utils::OpenHandle(this)->SetInternalField(index, *proxy);
   }
-  HandleScope scope;
-  i::Handle<i::Proxy> proxy =
-      i::Factory::NewProxy(reinterpret_cast<i::Address>(value), i::TENURED);
-  if (!proxy.is_null())
-      Utils::OpenHandle(this)->SetInternalField(index, *proxy);
+  ASSERT_EQ(value, GetPointerFromInternalField(index));
 }
 
 
@@ -3299,7 +3316,8 @@ bool v8::V8::Dispose() {
 
 HeapStatistics::HeapStatistics(): total_heap_size_(0),
                                   total_heap_size_executable_(0),
-                                  used_heap_size_(0) { }
+                                  used_heap_size_(0),
+                                  heap_size_limit_(0) { }
 
 
 void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
@@ -3307,6 +3325,7 @@ void v8::V8::GetHeapStatistics(HeapStatistics* heap_statistics) {
   heap_statistics->set_total_heap_size_executable(
       i::Heap::CommittedMemoryExecutable());
   heap_statistics->set_used_heap_size(i::Heap::SizeOfObjects());
+  heap_statistics->set_heap_size_limit(i::Heap::MaxReserved());
 }
 
 
@@ -3560,11 +3579,13 @@ Local<Value> v8::External::Wrap(void* data) {
   LOG_API("External::Wrap");
   EnsureInitialized("v8::External::Wrap()");
   ENTER_V8;
-  i::Object* as_object = reinterpret_cast<i::Object*>(data);
-  if (as_object->IsSmi()) {
-    return Utils::ToLocal(i::Handle<i::Object>(as_object));
-  }
-  return ExternalNewImpl(data);
+
+  v8::Local<v8::Value> result = CanBeEncodedAsSmi(data)
+      ? Utils::ToLocal(i::Handle<i::Object>(EncodeAsSmi(data)))
+      : v8::Local<v8::Value>(ExternalNewImpl(data));
+
+  ASSERT_EQ(data, Unwrap(result));
+  return result;
 }
 
 
@@ -3572,7 +3593,7 @@ void* v8::Object::SlowGetPointerFromInternalField(int index) {
   i::Handle<i::JSObject> obj = Utils::OpenHandle(this);
   i::Object* value = obj->GetInternalField(index);
   if (value->IsSmi()) {
-    return value;
+    return i::Internals::GetExternalPointerFromSmi(value);
   } else if (value->IsProxy()) {
     return reinterpret_cast<void*>(i::Proxy::cast(value)->proxy());
   } else {
@@ -3586,8 +3607,7 @@ void* v8::External::FullUnwrap(v8::Handle<v8::Value> wrapper) {
   i::Handle<i::Object> obj = Utils::OpenHandle(*wrapper);
   void* result;
   if (obj->IsSmi()) {
-    // The external value was an aligned pointer.
-    result = *obj;
+    result = i::Internals::GetExternalPointerFromSmi(*obj);
   } else if (obj->IsProxy()) {
     result = ExternalValueImpl(obj);
   } else {

deps/v8/src/arm/assembler-arm.cc

@@ -2337,12 +2337,11 @@ void Assembler::vdiv(const DwVfpRegister dst,
 
 void Assembler::vcmp(const DwVfpRegister src1,
                      const DwVfpRegister src2,
-                     const SBit s,
                      const Condition cond) {
   // vcmp(Dd, Dm) double precision floating point comparison.
   // Instruction details available in ARM DDI 0406A, A8-570.
   // cond(31-28) | 11101 (27-23)| D=?(22) | 11 (21-20) | 0100 (19-16) |
-  // Vd(15-12) | 101(11-9) | sz(8)=1 | E(7)=? | 1(6) | M(5)=? | 0(4) | Vm(3-0)
+  // Vd(15-12) | 101(11-9) | sz(8)=1 | E(7)=0 | 1(6) | M(5)=? | 0(4) | Vm(3-0)
   ASSERT(CpuFeatures::IsEnabled(VFP3));
   emit(cond | 0xE*B24 |B23 | 0x3*B20 | B18 |
        src1.code()*B12 | 0x5*B9 | B8 | B6 | src2.code());
@@ -2351,12 +2350,11 @@ void Assembler::vcmp(const DwVfpRegister src1,
 
 void Assembler::vcmp(const DwVfpRegister src1,
                      const double src2,
-                     const SBit s,
                      const Condition cond) {
   // vcmp(Dd, Dm) double precision floating point comparison.
   // Instruction details available in ARM DDI 0406A, A8-570.
   // cond(31-28) | 11101 (27-23)| D=?(22) | 11 (21-20) | 0101 (19-16) |
-  // Vd(15-12) | 101(11-9) | sz(8)=1 | E(7)=? | 1(6) | M(5)=? | 0(4) | 0000(3-0)
+  // Vd(15-12) | 101(11-9) | sz(8)=1 | E(7)=0 | 1(6) | M(5)=? | 0(4) | 0000(3-0)
   ASSERT(CpuFeatures::IsEnabled(VFP3));
   ASSERT(src2 == 0.0);
   emit(cond | 0xE*B24 |B23 | 0x3*B20 | B18 | B16 |

deps/v8/src/arm/assembler-arm.h

@@ -66,13 +66,14 @@ namespace internal {
 // such that we use an enum in optimized mode, and the struct in debug
 // mode. This way we get the compile-time error checking in debug mode
 // and best performance in optimized code.
-//
+
 // Core register
 struct Register {
   static const int kNumRegisters = 16;
   static const int kNumAllocatableRegisters = 8;
 
   static int ToAllocationIndex(Register reg) {
+    ASSERT(reg.code() < kNumAllocatableRegisters);
     return reg.code();
   }
 
@@ -132,7 +133,7 @@ const Register r5  = {  5 };
 const Register r6  = {  6 };
 const Register r7  = {  7 };
 const Register r8  = {  8 };  // Used as context register.
-const Register r9  = {  9 };
+const Register r9  = {  9 };  // Used as lithium codegen scratch register.
 const Register r10 = { 10 };  // Used as roots register.
 const Register fp  = { 11 };
 const Register ip  = { 12 };
@@ -166,6 +167,9 @@ struct SwVfpRegister {
 struct DwVfpRegister {
   // d0 has been excluded from allocation. This is following ia32
   // where xmm0 is excluded. This should be revisited.
+  // Currently d0 is used as a scratch register.
+  // d1 has also been excluded from allocation to be used as a scratch
+  // register as well.
   static const int kNumRegisters = 16;
   static const int kNumAllocatableRegisters = 15;
 
@@ -297,11 +301,18 @@ const DwVfpRegister d14 = { 14 };
 const DwVfpRegister d15 = { 15 };
 
 // VFP FPSCR constants.
-static const uint32_t kVFPExceptionMask = 0xf;
-static const uint32_t kVFPRoundingModeMask = 3 << 22;
+static const uint32_t kVFPNConditionFlagBit = 1 << 31;
+static const uint32_t kVFPZConditionFlagBit = 1 << 30;
+static const uint32_t kVFPCConditionFlagBit = 1 << 29;
+static const uint32_t kVFPVConditionFlagBit = 1 << 28;
+
 static const uint32_t kVFPFlushToZeroMask = 1 << 24;
+
+static const uint32_t kVFPRoundingModeMask = 3 << 22;
 static const uint32_t kVFPRoundToMinusInfinityBits = 2 << 22;
 
+static const uint32_t kVFPExceptionMask = 0xf;
+
 // Coprocessor register
 struct CRegister {
   bool is_valid() const { return 0 <= code_ && code_ < 16; }
@@ -1144,11 +1155,9 @@ class Assembler : public Malloced {
             const Condition cond = al);
   void vcmp(const DwVfpRegister src1,
             const DwVfpRegister src2,
-            const SBit s = LeaveCC,
             const Condition cond = al);
   void vcmp(const DwVfpRegister src1,
             const double src2,
-            const SBit s = LeaveCC,
             const Condition cond = al);
   void vmrs(const Register dst,
             const Condition cond = al);

deps/v8/src/arm/builtins-arm.cc

@@ -502,7 +502,7 @@ void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
 
   // Load the first arguments in r0 and get rid of the rest.
   Label no_arguments;
-  __ cmp(r0, Operand(0));
+  __ cmp(r0, Operand(0, RelocInfo::NONE));
   __ b(eq, &no_arguments);
   // First args = sp[(argc - 1) * 4].
   __ sub(r0, r0, Operand(1));
@@ -546,7 +546,7 @@ void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
     __ cmp(r4, Operand(JSValue::kSize >> kPointerSizeLog2));
     __ Assert(eq, "Unexpected string wrapper instance size");
     __ ldrb(r4, FieldMemOperand(map, Map::kUnusedPropertyFieldsOffset));
-    __ cmp(r4, Operand(0));
+    __ cmp(r4, Operand(0, RelocInfo::NONE));
     __ Assert(eq, "Unexpected unused properties of string wrapper");
   }
   __ str(map, FieldMemOperand(r0, HeapObject::kMapOffset));

deps/v8/src/arm/code-stubs-arm.cc

@@ -866,8 +866,7 @@ void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm,
       __ vldr(d0, scratch2, HeapNumber::kValueOffset);
       __ sub(probe, probe, Operand(kHeapObjectTag));
       __ vldr(d1, probe, HeapNumber::kValueOffset);
-      __ vcmp(d0, d1);
-      __ vmrs(pc);
+      __ VFPCompareAndSetFlags(d0, d1);
       __ b(ne, not_found);  // The cache did not contain this value.
       __ b(&load_result_from_cache);
     } else {
@@ -917,13 +916,6 @@ void NumberToStringStub::Generate(MacroAssembler* masm) {
 }
 
 
-void RecordWriteStub::Generate(MacroAssembler* masm) {
-  __ add(offset_, object_, Operand(offset_));
-  __ RecordWriteHelper(object_, offset_, scratch_);
-  __ Ret();
-}
-
-
 // On entry lhs_ and rhs_ are the values to be compared.
 // On exit r0 is 0, positive or negative to indicate the result of
 // the comparison.
@@ -982,8 +974,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
     CpuFeatures::Scope scope(VFP3);
     Label no_nan;
     // ARMv7 VFP3 instructions to implement double precision comparison.
-    __ vcmp(d7, d6);
-    __ vmrs(pc);  // Move vector status bits to normal status bits.
+    __ VFPCompareAndSetFlags(d7, d6);
     Label nan;
     __ b(vs, &nan);
     __ mov(r0, Operand(EQUAL), LeaveCC, eq);
@@ -1103,8 +1094,7 @@ void ToBooleanStub::Generate(MacroAssembler* masm) {
 
   __ sub(ip, tos_, Operand(kHeapObjectTag));
   __ vldr(d1, ip, HeapNumber::kValueOffset);
-  __ vcmp(d1, 0.0);
-  __ vmrs(pc);
+  __ VFPCompareAndSetFlags(d1, 0.0);
   // "tos_" is a register, and contains a non zero value by default.
   // Hence we only need to overwrite "tos_" with zero to return false for
   // FP_ZERO or FP_NAN cases. Otherwise, by default it returns true.
@@ -1229,16 +1219,22 @@ void GenericBinaryOpStub::HandleBinaryOpSlowCases(
   bool generate_code_to_calculate_answer = true;
 
   if (ShouldGenerateFPCode()) {
+    // DIV has neither SmiSmi fast code nor specialized slow code.
+    // So don't try to patch a DIV Stub.
     if (runtime_operands_type_ == BinaryOpIC::DEFAULT) {
       switch (op_) {
         case Token::ADD:
         case Token::SUB:
         case Token::MUL:
-        case Token::DIV:
           GenerateTypeTransition(masm);  // Tail call.
           generate_code_to_calculate_answer = false;
           break;
 
+        case Token::DIV:
+          // DIV has neither SmiSmi fast code nor specialized slow code.
+          // So don't try to patch a DIV Stub.
+          break;
+
         default:
           break;
       }
@@ -1299,7 +1295,8 @@ void GenericBinaryOpStub::HandleBinaryOpSlowCases(
       // HEAP_NUMBERS stub is slower than GENERIC on a pair of smis.
       // r0 is known to be a smi. If r1 is also a smi then switch to GENERIC.
       Label r1_is_not_smi;
-      if (runtime_operands_type_ == BinaryOpIC::HEAP_NUMBERS) {
+      if ((runtime_operands_type_ == BinaryOpIC::HEAP_NUMBERS) &&
+          HasSmiSmiFastPath()) {
         __ tst(r1, Operand(kSmiTagMask));
         __ b(ne, &r1_is_not_smi);
         GenerateTypeTransition(masm);  // Tail call.
@@ -2519,7 +2516,7 @@ void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm,
   if (type == OUT_OF_MEMORY) {
     // Set external caught exception to false.
     ExternalReference external_caught(Top::k_external_caught_exception_address);
-    __ mov(r0, Operand(false));
+    __ mov(r0, Operand(false, RelocInfo::NONE));
     __ mov(r2, Operand(external_caught));
     __ str(r0, MemOperand(r2));
 
@@ -2894,45 +2891,45 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
 
 
 // Uses registers r0 to r4. Expected input is
-// function in r0 (or at sp+1*ptrsz) and object in
+// object in r0 (or at sp+1*kPointerSize) and function in
 // r1 (or at sp), depending on whether or not
 // args_in_registers() is true.
 void InstanceofStub::Generate(MacroAssembler* masm) {
   // Fixed register usage throughout the stub:
-  const Register object = r1;  // Object (lhs).
+  const Register object = r0;  // Object (lhs).
   const Register map = r3;  // Map of the object.
-  const Register function = r0;  // Function (rhs).
+  const Register function = r1;  // Function (rhs).
   const Register prototype = r4;  // Prototype of the function.
   const Register scratch = r2;
   Label slow, loop, is_instance, is_not_instance, not_js_object;
-  if (!args_in_registers()) {
-    __ ldr(function, MemOperand(sp, 1 * kPointerSize));
-    __ ldr(object, MemOperand(sp, 0));
+  if (!HasArgsInRegisters()) {
+    __ ldr(object, MemOperand(sp, 1 * kPointerSize));
+    __ ldr(function, MemOperand(sp, 0));
   }
 
   // Check that the left hand is a JS object and load map.
-  __ BranchOnSmi(object, &slow);
-  __ IsObjectJSObjectType(object, map, scratch, &slow);
+  __ BranchOnSmi(object, &not_js_object);
+  __ IsObjectJSObjectType(object, map, scratch, &not_js_object);
 
   // Look up the function and the map in the instanceof cache.
   Label miss;
   __ LoadRoot(ip, Heap::kInstanceofCacheFunctionRootIndex);
-  __ cmp(object, ip);
+  __ cmp(function, ip);
   __ b(ne, &miss);
   __ LoadRoot(ip, Heap::kInstanceofCacheMapRootIndex);
   __ cmp(map, ip);
   __ b(ne, &miss);
-  __ LoadRoot(function, Heap::kInstanceofCacheAnswerRootIndex);
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ LoadRoot(r0, Heap::kInstanceofCacheAnswerRootIndex);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   __ bind(&miss);
-  __ TryGetFunctionPrototype(object, prototype, scratch, &slow);
+  __ TryGetFunctionPrototype(function, prototype, scratch, &slow);
 
   // Check that the function prototype is a JS object.
   __ BranchOnSmi(prototype, &slow);
   __ IsObjectJSObjectType(prototype, scratch, scratch, &slow);
 
-  __ StoreRoot(object, Heap::kInstanceofCacheFunctionRootIndex);
+  __ StoreRoot(function, Heap::kInstanceofCacheFunctionRootIndex);
   __ StoreRoot(map, Heap::kInstanceofCacheMapRootIndex);
 
   // Register mapping: r3 is object map and r4 is function prototype.
@@ -2953,11 +2950,12 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   __ bind(&is_instance);
   __ mov(r0, Operand(Smi::FromInt(0)));
   __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex);
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   __ bind(&is_not_instance);
   __ mov(r0, Operand(Smi::FromInt(1)));
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ StoreRoot(r0, Heap::kInstanceofCacheAnswerRootIndex);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   Label object_not_null, object_not_null_or_smi;
   __ bind(&not_js_object);
@@ -2971,22 +2969,25 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   __ cmp(scratch, Operand(Factory::null_value()));
   __ b(ne, &object_not_null);
   __ mov(r0, Operand(Smi::FromInt(1)));
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   __ bind(&object_not_null);
   // Smi values are not instances of anything.
   __ BranchOnNotSmi(object, &object_not_null_or_smi);
   __ mov(r0, Operand(Smi::FromInt(1)));
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   __ bind(&object_not_null_or_smi);
   // String values are not instances of anything.
   __ IsObjectJSStringType(object, scratch, &slow);
   __ mov(r0, Operand(Smi::FromInt(1)));
-  __ Ret(args_in_registers() ? 0 : 2);
+  __ Ret(HasArgsInRegisters() ? 0 : 2);
 
   // Slow-case.  Tail call builtin.
   __ bind(&slow);
+  if (HasArgsInRegisters()) {
+    __ Push(r0, r1);
+  }
   __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_JS);
 }
 
@@ -3012,7 +3013,7 @@ void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   // through register r0. Use unsigned comparison to get negative
   // check for free.
   __ cmp(r1, r0);
-  __ b(cs, &slow);
+  __ b(hs, &slow);
 
   // Read the argument from the stack and return it.
   __ sub(r3, r0, r1);
@@ -4911,8 +4912,7 @@ void ICCompareStub::GenerateHeapNumbers(MacroAssembler* masm) {
     __ vldr(d1, r2, HeapNumber::kValueOffset);
 
     // Compare operands
-    __ vcmp(d0, d1);
-    __ vmrs(pc);  // Move vector status bits to normal status bits.
+    __ VFPCompareAndSetFlags(d0, d1);
 
     // Don't base result on status bits when a NaN is involved.
     __ b(vs, &unordered);

deps/v8/src/arm/code-stubs-arm.h

@@ -77,7 +77,7 @@ class GenericBinaryOpStub : public CodeStub {
         rhs_(rhs),
         constant_rhs_(constant_rhs),
         specialized_on_rhs_(RhsIsOneWeWantToOptimizeFor(op, constant_rhs)),
-        runtime_operands_type_(BinaryOpIC::DEFAULT),
+        runtime_operands_type_(BinaryOpIC::UNINIT_OR_SMI),
         name_(NULL) { }
 
   GenericBinaryOpStub(int key, BinaryOpIC::TypeInfo type_info)
@@ -178,6 +178,10 @@ class GenericBinaryOpStub : public CodeStub {
     return lhs_is_r0 ? r1 : r0;
   }
 
+  bool HasSmiSmiFastPath() {
+    return op_ != Token::DIV;
+  }
+
   bool ShouldGenerateSmiCode() {
     return ((op_ != Token::DIV && op_ != Token::MOD) || specialized_on_rhs_) &&
         runtime_operands_type_ != BinaryOpIC::HEAP_NUMBERS &&
@@ -437,43 +441,6 @@ class NumberToStringStub: public CodeStub {
 };
 
 
-class RecordWriteStub : public CodeStub {
- public:
-  RecordWriteStub(Register object, Register offset, Register scratch)
-      : object_(object), offset_(offset), scratch_(scratch) { }
-
-  void Generate(MacroAssembler* masm);
-
- private:
-  Register object_;
-  Register offset_;
-  Register scratch_;
-
-  // Minor key encoding in 12 bits. 4 bits for each of the three
-  // registers (object, offset and scratch) OOOOAAAASSSS.
-  class ScratchBits: public BitField<uint32_t, 0, 4> {};
-  class OffsetBits: public BitField<uint32_t, 4, 4> {};
-  class ObjectBits: public BitField<uint32_t, 8, 4> {};
-
-  Major MajorKey() { return RecordWrite; }
-
-  int MinorKey() {
-    // Encode the registers.
-    return ObjectBits::encode(object_.code()) |
-           OffsetBits::encode(offset_.code()) |
-           ScratchBits::encode(scratch_.code());
-  }
-
-#ifdef DEBUG
-  void Print() {
-    PrintF("RecordWriteStub (object reg %d), (offset reg %d),"
-           " (scratch reg %d)\n",
-           object_.code(), offset_.code(), scratch_.code());
-  }
-#endif
-};
-
-
 // Enter C code from generated RegExp code in a way that allows
 // the C code to fix the return address in case of a GC.
 // Currently only needed on ARM.

deps/v8/src/arm/codegen-arm.cc

@@ -596,7 +596,7 @@ void CodeGenerator::StoreArgumentsObject(bool initial) {
     // When using lazy arguments allocation, we store the hole value
     // as a sentinel indicating that the arguments object hasn't been
     // allocated yet.
-    frame_->EmitPushRoot(Heap::kTheHoleValueRootIndex);
+    frame_->EmitPushRoot(Heap::kArgumentsMarkerRootIndex);
   } else {
     frame_->SpillAll();
     ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT);
@@ -623,7 +623,7 @@ void CodeGenerator::StoreArgumentsObject(bool initial) {
     // has a local variable named 'arguments'.
     LoadFromSlot(scope()->arguments()->AsSlot(), NOT_INSIDE_TYPEOF);
     Register arguments = frame_->PopToRegister();
-    __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
+    __ LoadRoot(ip, Heap::kArgumentsMarkerRootIndex);
     __ cmp(arguments, ip);
     done.Branch(ne);
   }
@@ -1748,7 +1748,7 @@ void CodeGenerator::CallApplyLazy(Expression* applicand,
   // named 'arguments' has been introduced.
   JumpTarget slow;
   Label done;
-  __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
+  __ LoadRoot(ip, Heap::kArgumentsMarkerRootIndex);
   __ cmp(ip, arguments_reg);
   slow.Branch(ne);
 
@@ -3255,7 +3255,7 @@ void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot,
   // If the loaded value is the sentinel that indicates that we
   // haven't loaded the arguments object yet, we need to do it now.
   JumpTarget exit;
-  __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
+  __ LoadRoot(ip, Heap::kArgumentsMarkerRootIndex);
   __ cmp(tos, ip);
   exit.Branch(ne);
   frame_->Drop();
@@ -4667,8 +4667,7 @@ void CodeGenerator::GenerateMathPow(ZoneList<Expression*>* args) {
     __ mov(scratch2, Operand(0x7FF00000));
     __ mov(scratch1, Operand(0, RelocInfo::NONE));
     __ vmov(d1, scratch1, scratch2);  // Load infinity into d1.
-    __ vcmp(d0, d1);
-    __ vmrs(pc);
+    __ VFPCompareAndSetFlags(d0, d1);
     runtime.Branch(eq);  // d0 reached infinity.
     __ vdiv(d0, d2, d0);
     __ b(&allocate_return);
@@ -5618,12 +5617,10 @@ void CodeGenerator::GenerateSwapElements(ZoneList<Expression*>* args) {
   // (or them and test against Smi mask.)
 
   __ mov(tmp2, tmp1);
-  RecordWriteStub recordWrite1(tmp1, index1, tmp3);
-  __ CallStub(&recordWrite1);
-
-  RecordWriteStub recordWrite2(tmp2, index2, tmp3);
-  __ CallStub(&recordWrite2);
-
+  __ add(index1, index1, tmp1);
+  __ add(index2, index2, tmp1);
+  __ RecordWriteHelper(tmp1, index1, tmp3);
+  __ RecordWriteHelper(tmp2, index2, tmp3);
   __ bind(&done);
 
   deferred->BindExit();

deps/v8/src/arm/deoptimizer-arm.cc

@@ -55,8 +55,9 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   SafepointTable table(function->code());
   for (unsigned i = 0; i < table.length(); i++) {
     unsigned pc_offset = table.GetPcOffset(i);
-    int deoptimization_index = table.GetDeoptimizationIndex(i);
-    int gap_code_size = table.GetGapCodeSize(i);
+    SafepointEntry safepoint_entry = table.GetEntry(i);
+    int deoptimization_index = safepoint_entry.deoptimization_index();
+    int gap_code_size = safepoint_entry.gap_code_size();
     // Check that we did not shoot past next safepoint.
     // TODO(srdjan): How do we guarantee that safepoint code does not
     // overlap other safepoint patching code?

deps/v8/src/arm/full-codegen-arm.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -38,6 +38,8 @@
 #include "scopes.h"
 #include "stub-cache.h"
 
+#include "arm/code-stubs-arm.h"
+
 namespace v8 {
 namespace internal {
 
@@ -219,10 +221,17 @@ void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) {
   __ b(hs, &ok);
   StackCheckStub stub;
   __ CallStub(&stub);
+  // Record a mapping of this PC offset to the OSR id.  This is used to find
+  // the AST id from the unoptimized code in order to use it as a key into
+  // the deoptimization input data found in the optimized code.
+  RecordStackCheck(stmt->OsrEntryId());
+
   __ bind(&ok);
   PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
+  // Record a mapping of the OSR id to this PC.  This is used if the OSR
+  // entry becomes the target of a bailout.  We don't expect it to be, but
+  // we want it to work if it is.
   PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);
-  RecordStackCheck(stmt->OsrEntryId());
 }
 
 

deps/v8/src/arm/ic-arm.cc

@@ -1591,7 +1591,7 @@ void KeyedLoadIC::GenerateExternalArray(MacroAssembler* masm,
       __ and_(r1, r1, Operand(kBinary32ExponentMask >> kBinary32MantissaBits));
 
       Label exponent_rebiased;
-      __ teq(r1, Operand(0x00));
+      __ teq(r1, Operand(0x00, RelocInfo::NONE));
       __ b(eq, &exponent_rebiased);
 
       __ teq(r1, Operand(0xff));

deps/v8/src/arm/lithium-arm.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -93,32 +93,6 @@ void LLabel::PrintDataTo(StringStream* stream) const {
 }
 
 
-bool LParallelMove::IsRedundant() const {
-  for (int i = 0; i < move_operands_.length(); ++i) {
-    if (!move_operands_[i].IsRedundant()) return false;
-  }
-  return true;
-}
-
-
-void LParallelMove::PrintDataTo(StringStream* stream) const {
-  for (int i = move_operands_.length() - 1; i >= 0; --i) {
-    if (!move_operands_[i].IsEliminated()) {
-      LOperand* from = move_operands_[i].from();
-      LOperand* to = move_operands_[i].to();
-      if (from->Equals(to)) {
-        to->PrintTo(stream);
-      } else {
-        to->PrintTo(stream);
-        stream->Add(" = ");
-        from->PrintTo(stream);
-      }
-      stream->Add("; ");
-    }
-  }
-}
-
-
 bool LGap::IsRedundant() const {
   for (int i = 0; i < 4; i++) {
     if (parallel_moves_[i] != NULL && !parallel_moves_[i]->IsRedundant()) {
@@ -270,6 +244,11 @@ void LUnaryMathOperation::PrintDataTo(StringStream* stream) const {
 }
 
 
+void LLoadContextSlot::PrintDataTo(StringStream* stream) {
+  stream->Add("(%d, %d)", context_chain_length(), slot_index());
+}
+
+
 void LCallKeyed::PrintDataTo(StringStream* stream) const {
   stream->Add("[r2] #%d / ", arity());
 }
@@ -472,151 +451,6 @@ void LChunk::AddGapMove(int index, LOperand* from, LOperand* to) {
 }
 
 
-class LGapNode: public ZoneObject {
- public:
-  explicit LGapNode(LOperand* operand)
-      : operand_(operand), resolved_(false), visited_id_(-1) { }
-
-  LOperand* operand() const { return operand_; }
-  bool IsResolved() const { return !IsAssigned() || resolved_; }
-  void MarkResolved() {
-    ASSERT(!IsResolved());
-    resolved_ = true;
-  }
-  int visited_id() const { return visited_id_; }
-  void set_visited_id(int id) {
-    ASSERT(id > visited_id_);
-    visited_id_ = id;
-  }
-
-  bool IsAssigned() const { return assigned_from_.is_set(); }
-  LGapNode* assigned_from() const { return assigned_from_.get(); }
-  void set_assigned_from(LGapNode* n) { assigned_from_.set(n); }
-
- private:
-  LOperand* operand_;
-  SetOncePointer<LGapNode> assigned_from_;
-  bool resolved_;
-  int visited_id_;
-};
-
-
-LGapResolver::LGapResolver(const ZoneList<LMoveOperands>* moves,
-                           LOperand* marker_operand)
-    : nodes_(4),
-      identified_cycles_(4),
-      result_(4),
-      marker_operand_(marker_operand),
-      next_visited_id_(0) {
-  for (int i = 0; i < moves->length(); ++i) {
-    LMoveOperands move = moves->at(i);
-    if (!move.IsRedundant()) RegisterMove(move);
-  }
-}
-
-
-const ZoneList<LMoveOperands>* LGapResolver::ResolveInReverseOrder() {
-  for (int i = 0; i < identified_cycles_.length(); ++i) {
-    ResolveCycle(identified_cycles_[i]);
-  }
-
-  int unresolved_nodes;
-  do {
-    unresolved_nodes = 0;
-    for (int j = 0; j < nodes_.length(); j++) {
-      LGapNode* node = nodes_[j];
-      if (!node->IsResolved() && node->assigned_from()->IsResolved()) {
-        AddResultMove(node->assigned_from(), node);
-        node->MarkResolved();
-      }
-      if (!node->IsResolved()) ++unresolved_nodes;
-    }
-  } while (unresolved_nodes > 0);
-  return &result_;
-}
-
-
-void LGapResolver::AddResultMove(LGapNode* from, LGapNode* to) {
-  AddResultMove(from->operand(), to->operand());
-}
-
-
-void LGapResolver::AddResultMove(LOperand* from, LOperand* to) {
-  result_.Add(LMoveOperands(from, to));
-}
-
-
-void LGapResolver::ResolveCycle(LGapNode* start) {
-  ZoneList<LOperand*> circle_operands(8);
-  circle_operands.Add(marker_operand_);
-  LGapNode* cur = start;
-  do {
-    cur->MarkResolved();
-    circle_operands.Add(cur->operand());
-    cur = cur->assigned_from();
-  } while (cur != start);
-  circle_operands.Add(marker_operand_);
-
-  for (int i = circle_operands.length() - 1; i > 0; --i) {
-    LOperand* from = circle_operands[i];
-    LOperand* to = circle_operands[i - 1];
-    AddResultMove(from, to);
-  }
-}
-
-
-bool LGapResolver::CanReach(LGapNode* a, LGapNode* b, int visited_id) {
-  ASSERT(a != b);
-  LGapNode* cur = a;
-  while (cur != b && cur->visited_id() != visited_id && cur->IsAssigned()) {
-    cur->set_visited_id(visited_id);
-    cur = cur->assigned_from();
-  }
-
-  return cur == b;
-}
-
-
-bool LGapResolver::CanReach(LGapNode* a, LGapNode* b) {
-  ASSERT(a != b);
-  return CanReach(a, b, next_visited_id_++);
-}
-
-
-void LGapResolver::RegisterMove(LMoveOperands move) {
-  if (move.from()->IsConstantOperand()) {
-    // Constant moves should be last in the machine code. Therefore add them
-    // first to the result set.
-    AddResultMove(move.from(), move.to());
-  } else {
-    LGapNode* from = LookupNode(move.from());
-    LGapNode* to = LookupNode(move.to());
-    if (to->IsAssigned() && to->assigned_from() == from) {
-      move.Eliminate();
-      return;
-    }
-    ASSERT(!to->IsAssigned());
-    if (CanReach(from, to)) {
-      // This introduces a circle. Save.
-      identified_cycles_.Add(from);
-    }
-    to->set_assigned_from(from);
-  }
-}
-
-
-LGapNode* LGapResolver::LookupNode(LOperand* operand) {
-  for (int i = 0; i < nodes_.length(); ++i) {
-    if (nodes_[i]->operand()->Equals(operand)) return nodes_[i];
-  }
-
-  // No node found => create a new one.
-  LGapNode* result = new LGapNode(operand);
-  nodes_.Add(result);
-  return result;
-}
-
-
 Handle<Object> LChunk::LookupLiteral(LConstantOperand* operand) const {
   return HConstant::cast(graph_->LookupValue(operand->index()))->handle();
 }
@@ -767,11 +601,6 @@ LInstruction* LChunkBuilder::DefineAsSpilled(LInstruction* instr, int index) {
 }
 
 
-LInstruction* LChunkBuilder::DefineSameAsAny(LInstruction* instr) {
-  return Define(instr, new LUnallocated(LUnallocated::SAME_AS_ANY_INPUT));
-}
-
-
 LInstruction* LChunkBuilder::DefineSameAsFirst(LInstruction* instr) {
   return Define(instr, new LUnallocated(LUnallocated::SAME_AS_FIRST_INPUT));
 }
@@ -852,13 +681,6 @@ LInstruction* LChunkBuilder::Define(LInstruction* instr, LUnallocated* result) {
 }
 
 
-LOperand* LChunkBuilder::Temp() {
-  LUnallocated* operand = new LUnallocated(LUnallocated::NONE);
-  allocator_->RecordTemporary(operand);
-  return operand;
-}
-
-
 LUnallocated* LChunkBuilder::TempRegister() {
   LUnallocated* operand = new LUnallocated(LUnallocated::MUST_HAVE_REGISTER);
   allocator_->RecordTemporary(operand);
@@ -1016,9 +838,6 @@ void LChunkBuilder::DoBasicBlock(HBasicBlock* block, HBasicBlock* next_block) {
   HInstruction* current = block->first();
   int start = chunk_->instructions()->length();
   while (current != NULL && !is_aborted()) {
-    if (FLAG_trace_environment) {
-      PrintF("Process instruction %d\n", current->id());
-    }
     // Code for constants in registers is generated lazily.
     if (!current->EmitAtUses()) {
       VisitInstruction(current);
@@ -1066,66 +885,13 @@ void LChunkBuilder::VisitInstruction(HInstruction* current) {
 }
 
 
-void LEnvironment::WriteTranslation(LCodeGen* cgen,
-                                    Translation* translation) const {
-  if (this == NULL) return;
-
-  // The translation includes one command per value in the environment.
-  int translation_size = values()->length();
-  // The output frame height does not include the parameters.
-  int height = translation_size - parameter_count();
-
-  outer()->WriteTranslation(cgen, translation);
-  int closure_id = cgen->DefineDeoptimizationLiteral(closure());
-  translation->BeginFrame(ast_id(), closure_id, height);
-  for (int i = 0; i < translation_size; ++i) {
-    LOperand* value = values()->at(i);
-    // spilled_registers_ and spilled_double_registers_ are either
-    // both NULL or both set.
-    if (spilled_registers_ != NULL && value != NULL) {
-      if (value->IsRegister() &&
-          spilled_registers_[value->index()] != NULL) {
-        translation->MarkDuplicate();
-        cgen->AddToTranslation(translation,
-                               spilled_registers_[value->index()],
-                               HasTaggedValueAt(i));
-      } else if (value->IsDoubleRegister() &&
-                 spilled_double_registers_[value->index()] != NULL) {
-        translation->MarkDuplicate();
-        cgen->AddToTranslation(translation,
-                               spilled_double_registers_[value->index()],
-                               false);
-      }
-    }
-
-    cgen->AddToTranslation(translation, value, HasTaggedValueAt(i));
-  }
-}
-
-
-void LEnvironment::PrintTo(StringStream* stream) const {
-  stream->Add("[id=%d|", ast_id());
-  stream->Add("[parameters=%d|", parameter_count());
-  stream->Add("[arguments_stack_height=%d|", arguments_stack_height());
-  for (int i = 0; i < values_.length(); ++i) {
-    if (i != 0) stream->Add(";");
-    if (values_[i] == NULL) {
-      stream->Add("[hole]");
-    } else {
-      values_[i]->PrintTo(stream);
-    }
-  }
-  stream->Add("]");
-}
-
-
 LEnvironment* LChunkBuilder::CreateEnvironment(HEnvironment* hydrogen_env) {
   if (hydrogen_env == NULL) return NULL;
 
   LEnvironment* outer = CreateEnvironment(hydrogen_env->outer());
   int ast_id = hydrogen_env->ast_id();
   ASSERT(ast_id != AstNode::kNoNumber);
-  int value_count = hydrogen_env->values()->length();
+  int value_count = hydrogen_env->length();
   LEnvironment* result = new LEnvironment(hydrogen_env->closure(),
                                           ast_id,
                                           hydrogen_env->parameter_count(),
@@ -1176,7 +942,6 @@ LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
       ASSERT(compare->value()->representation().IsTagged());
 
       return new LClassOfTestAndBranch(UseTempRegister(compare->value()),
-                                       TempRegister(),
                                        TempRegister(),
                                        first_id,
                                        second_id);
@@ -1185,22 +950,21 @@ LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
       Token::Value op = compare->token();
       HValue* left = compare->left();
       HValue* right = compare->right();
-      if (left->representation().IsInteger32()) {
+      Representation r = compare->GetInputRepresentation();
+      if (r.IsInteger32()) {
+        ASSERT(left->representation().IsInteger32());
         ASSERT(right->representation().IsInteger32());
-        return new LCmpIDAndBranch(op,
-                                   UseRegisterAtStart(left),
+        return new LCmpIDAndBranch(UseRegisterAtStart(left),
                                    UseOrConstantAtStart(right),
                                    first_id,
-                                   second_id,
-                                   false);
-      } else if (left->representation().IsDouble()) {
+                                   second_id);
+      } else if (r.IsDouble()) {
+        ASSERT(left->representation().IsDouble());
         ASSERT(right->representation().IsDouble());
-        return new LCmpIDAndBranch(op,
-                                   UseRegisterAtStart(left),
+        return new LCmpIDAndBranch(UseRegisterAtStart(left),
                                    UseRegisterAtStart(right),
                                    first_id,
-                                   second_id,
-                                   true);
+                                   second_id);
       } else {
         ASSERT(left->representation().IsTagged());
         ASSERT(right->representation().IsTagged());
@@ -1225,7 +989,6 @@ LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
       ASSERT(compare->value()->representation().IsTagged());
 
       return new LHasInstanceTypeAndBranch(UseRegisterAtStart(compare->value()),
-                                           TempRegister(),
                                            first_id,
                                            second_id);
     } else if (v->IsHasCachedArrayIndex()) {
@@ -1238,11 +1001,7 @@ LInstruction* LChunkBuilder::DoBranch(HBranch* instr) {
       HIsNull* compare = HIsNull::cast(v);
       ASSERT(compare->value()->representation().IsTagged());
 
-      // We only need a temp register for non-strict compare.
-      LOperand* temp = compare->is_strict() ? NULL : TempRegister();
       return new LIsNullAndBranch(UseRegisterAtStart(compare->value()),
-                                  compare->is_strict(),
-                                  temp,
                                   first_id,
                                   second_id);
     } else if (v->IsIsObject()) {
@@ -1295,17 +1054,13 @@ LInstruction* LChunkBuilder::DoCompareMapAndBranch(
     HCompareMapAndBranch* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseRegisterAtStart(instr->value());
-  HBasicBlock* first = instr->FirstSuccessor();
-  HBasicBlock* second = instr->SecondSuccessor();
-  return new LCmpMapAndBranch(value,
-                              instr->map(),
-                              first->block_id(),
-                              second->block_id());
+  LOperand* temp = TempRegister();
+  return new LCmpMapAndBranch(value, temp);
 }
 
 
 LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
-  return DefineAsRegister(new LArgumentsLength(Use(length->value())));
+  return DefineAsRegister(new LArgumentsLength(UseRegister(length->value())));
 }
 
 
@@ -1316,8 +1071,16 @@ LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
 
 LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
   LInstruction* result =
-      new LInstanceOf(UseFixed(instr->left(), r1),
-                      UseFixed(instr->right(), r0));
+      new LInstanceOf(UseFixed(instr->left(), r0),
+                      UseFixed(instr->right(), r1));
+  return MarkAsCall(DefineFixed(result, r0), instr);
+}
+
+
+LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
+    HInstanceOfKnownGlobal* instr) {
+  LInstruction* result =
+      new LInstanceOfKnownGlobal(UseFixed(instr->value(), r0));
   return MarkAsCall(DefineFixed(result, r0), instr);
 }
 
@@ -1362,7 +1125,8 @@ LInstruction* LChunkBuilder::DoCallConstantFunction(
 LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
   BuiltinFunctionId op = instr->op();
   LOperand* input = UseRegisterAtStart(instr->value());
-  LInstruction* result = new LUnaryMathOperation(input);
+  LOperand* temp = (op == kMathFloor) ? TempRegister() : NULL;
+  LInstruction* result = new LUnaryMathOperation(input, temp);
   switch (op) {
     case kMathAbs:
       return AssignEnvironment(AssignPointerMap(DefineSameAsFirst(result)));
@@ -1370,6 +1134,9 @@ LInstruction* LChunkBuilder::DoUnaryMathOperation(HUnaryMathOperation* instr) {
       return AssignEnvironment(DefineAsRegister(result));
     case kMathSqrt:
       return DefineSameAsFirst(result);
+    case kMathRound:
+      Abort("MathRound LUnaryMathOperation not implemented");
+      return NULL;
     case kMathPowHalf:
       Abort("MathPowHalf LUnaryMathOperation not implemented");
       return NULL;
@@ -1476,12 +1243,15 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
   if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else if (instr->representation().IsInteger32()) {
-    // The temporary operand is necessary to ensure that right is not allocated
-    // into edx.
-    FixedTemp(r1);
+    // TODO(1042) The fixed register allocation
+    // is needed because we call GenericBinaryOpStub from
+    // the generated code, which requires registers r0
+    // and r1 to be used. We should remove that
+    // when we provide a native implementation.
     LOperand* value = UseFixed(instr->left(), r0);
-    LOperand* divisor = UseRegister(instr->right());
-    return AssignEnvironment(DefineFixed(new LDivI(value, divisor), r0));
+    LOperand* divisor = UseFixed(instr->right(), r1);
+    return AssignEnvironment(AssignPointerMap(
+             DefineFixed(new LDivI(value, divisor), r0)));
   } else {
     return DoArithmeticT(Token::DIV, instr);
   }
@@ -1490,18 +1260,17 @@ LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
 
 LInstruction* LChunkBuilder::DoMod(HMod* instr) {
   if (instr->representation().IsInteger32()) {
+    // TODO(1042) The fixed register allocation
+    // is needed because we call GenericBinaryOpStub from
+    // the generated code, which requires registers r0
+    // and r1 to be used. We should remove that
+    // when we provide a native implementation.
     ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
-    // The temporary operand is necessary to ensure that right is not allocated
-    // into edx.
-    FixedTemp(r1);
     LOperand* value = UseFixed(instr->left(), r0);
-    LOperand* divisor = UseRegister(instr->right());
-    LInstruction* result = DefineFixed(new LModI(value, divisor), r1);
-    if (instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
-        instr->CheckFlag(HValue::kCanBeDivByZero)) {
-      result = AssignEnvironment(result);
-    }
+    LOperand* divisor = UseFixed(instr->right(), r1);
+    LInstruction* result = DefineFixed(new LModI(value, divisor), r0);
+    result = AssignEnvironment(AssignPointerMap(result));
     return result;
   } else if (instr->representation().IsTagged()) {
     return DoArithmeticT(Token::MOD, instr);
@@ -1587,17 +1356,22 @@ LInstruction* LChunkBuilder::DoPower(HPower* instr) {
 
 LInstruction* LChunkBuilder::DoCompare(HCompare* instr) {
   Token::Value op = instr->token();
-  if (instr->left()->representation().IsInteger32()) {
+  Representation r = instr->GetInputRepresentation();
+  if (r.IsInteger32()) {
+    ASSERT(instr->left()->representation().IsInteger32());
     ASSERT(instr->right()->representation().IsInteger32());
     LOperand* left = UseRegisterAtStart(instr->left());
     LOperand* right = UseOrConstantAtStart(instr->right());
-    return DefineAsRegister(new LCmpID(op, left, right, false));
-  } else if (instr->left()->representation().IsDouble()) {
+    return DefineAsRegister(new LCmpID(left, right));
+  } else if (r.IsDouble()) {
+    ASSERT(instr->left()->representation().IsDouble());
     ASSERT(instr->right()->representation().IsDouble());
     LOperand* left = UseRegisterAtStart(instr->left());
     LOperand* right = UseRegisterAtStart(instr->right());
-    return DefineAsRegister(new LCmpID(op, left, right, true));
+    return DefineAsRegister(new LCmpID(left, right));
   } else {
+    ASSERT(instr->left()->representation().IsTagged());
+    ASSERT(instr->right()->representation().IsTagged());
     bool reversed = (op == Token::GT || op == Token::LTE);
     LOperand* left = UseFixed(instr->left(), reversed ? r0 : r1);
     LOperand* right = UseFixed(instr->right(), reversed ? r1 : r0);
@@ -1620,8 +1394,7 @@ LInstruction* LChunkBuilder::DoIsNull(HIsNull* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseRegisterAtStart(instr->value());
 
-  return DefineAsRegister(new LIsNull(value,
-                                      instr->is_strict()));
+  return DefineAsRegister(new LIsNull(value));
 }
 
 
@@ -1661,24 +1434,19 @@ LInstruction* LChunkBuilder::DoHasCachedArrayIndex(
 LInstruction* LChunkBuilder::DoClassOfTest(HClassOfTest* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseTempRegister(instr->value());
-
-  return DefineSameAsFirst(new LClassOfTest(value, TempRegister()));
+  return DefineSameAsFirst(new LClassOfTest(value));
 }
 
 
-LInstruction* LChunkBuilder::DoArrayLength(HArrayLength* instr) {
-  LOperand* array = NULL;
-  LOperand* temporary = NULL;
+LInstruction* LChunkBuilder::DoJSArrayLength(HJSArrayLength* instr) {
+  LOperand* array = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LJSArrayLength(array));
+}
 
-  if (instr->value()->IsLoadElements()) {
-    array = UseRegisterAtStart(instr->value());
-  } else {
-    array = UseRegister(instr->value());
-    temporary = TempRegister();
-  }
 
-  LInstruction* result = new LArrayLength(array, temporary);
-  return AssignEnvironment(DefineAsRegister(result));
+LInstruction* LChunkBuilder::DoFixedArrayLength(HFixedArrayLength* instr) {
+  LOperand* array = UseRegisterAtStart(instr->value());
+  return DefineAsRegister(new LFixedArrayLength(array));
 }
 
 
@@ -1691,7 +1459,7 @@ LInstruction* LChunkBuilder::DoValueOf(HValueOf* instr) {
 
 LInstruction* LChunkBuilder::DoBoundsCheck(HBoundsCheck* instr) {
   return AssignEnvironment(new LBoundsCheck(UseRegisterAtStart(instr->index()),
-                                            Use(instr->length())));
+                                            UseRegister(instr->length())));
 }
 
 
@@ -1771,18 +1539,15 @@ LInstruction* LChunkBuilder::DoCheckNonSmi(HCheckNonSmi* instr) {
 
 LInstruction* LChunkBuilder::DoCheckInstanceType(HCheckInstanceType* instr) {
   LOperand* value = UseRegisterAtStart(instr->value());
-  LOperand* temp = TempRegister();
-  LInstruction* result = new LCheckInstanceType(value, temp);
+  LInstruction* result = new LCheckInstanceType(value);
   return AssignEnvironment(result);
 }
 
 
 LInstruction* LChunkBuilder::DoCheckPrototypeMaps(HCheckPrototypeMaps* instr) {
-  LOperand* temp = TempRegister();
-  LInstruction* result =
-      new LCheckPrototypeMaps(temp,
-                              instr->holder(),
-                              instr->receiver_map());
+  LOperand* temp1 = TempRegister();
+  LOperand* temp2 = TempRegister();
+  LInstruction* result = new LCheckPrototypeMaps(temp1, temp2);
   return AssignEnvironment(result);
 }
 
@@ -1822,7 +1587,7 @@ LInstruction* LChunkBuilder::DoConstant(HConstant* instr) {
   } else if (r.IsTagged()) {
     return DefineAsRegister(new LConstantT(instr->handle()));
   } else {
-    Abort("unsupported constant of type double");
+    UNREACHABLE();
     return NULL;
   }
 }
@@ -1841,6 +1606,11 @@ LInstruction* LChunkBuilder::DoStoreGlobal(HStoreGlobal* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoLoadContextSlot(HLoadContextSlot* instr) {
+  return DefineAsRegister(new LLoadContextSlot);
+}
+
+
 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
   return DefineAsRegister(
       new LLoadNamedField(UseRegisterAtStart(instr->object())));
@@ -1854,6 +1624,13 @@ LInstruction* LChunkBuilder::DoLoadNamedGeneric(HLoadNamedGeneric* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoLoadFunctionPrototype(
+    HLoadFunctionPrototype* instr) {
+  return AssignEnvironment(DefineAsRegister(
+      new LLoadFunctionPrototype(UseRegister(instr->function()))));
+}
+
+
 LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
   LOperand* input = UseRegisterAtStart(instr->value());
   return DefineSameAsFirst(new LLoadElements(input));
@@ -1862,23 +1639,12 @@ LInstruction* LChunkBuilder::DoLoadElements(HLoadElements* instr) {
 
 LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
     HLoadKeyedFastElement* instr) {
-  Representation r = instr->representation();
-  LOperand* obj = UseRegisterAtStart(instr->object());
+  ASSERT(instr->representation().IsTagged());
   ASSERT(instr->key()->representation().IsInteger32());
+  LOperand* obj = UseRegisterAtStart(instr->object());
   LOperand* key = UseRegisterAtStart(instr->key());
-  LOperand* load_result = NULL;
-  // Double needs an extra temp, because the result is converted from heap
-  // number to a double register.
-  if (r.IsDouble()) load_result = TempRegister();
-  LInstruction* result = new LLoadKeyedFastElement(obj,
-                                                   key,
-                                                   load_result);
-  if (r.IsDouble()) {
-    result = DefineAsRegister(result);
-  } else {
-    result = DefineSameAsFirst(result);
-  }
-  return AssignEnvironment(result);
+  LInstruction* result = new LLoadKeyedFastElement(obj, key);
+  return AssignEnvironment(DefineSameAsFirst(result));
 }
 
 
@@ -1925,7 +1691,7 @@ LInstruction* LChunkBuilder::DoStoreKeyedGeneric(HStoreKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
-  bool needs_write_barrier = !instr->value()->type().IsSmi();
+  bool needs_write_barrier = instr->NeedsWriteBarrier();
 
   LOperand* obj = needs_write_barrier
       ? UseTempRegister(instr->object())
@@ -1935,19 +1701,7 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
       ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
 
-  // We only need a scratch register if we have a write barrier or we
-  // have a store into the properties array (not in-object-property).
-  LOperand* temp = (!instr->is_in_object() || needs_write_barrier)
-      ? TempRegister() : NULL;
-
-  return new LStoreNamedField(obj,
-                              instr->name(),
-                              val,
-                              instr->is_in_object(),
-                              instr->offset(),
-                              temp,
-                              needs_write_barrier,
-                              instr->transition());
+  return new LStoreNamedField(obj, val);
 }
 
 
@@ -1955,7 +1709,7 @@ LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
   LOperand* obj = UseFixed(instr->object(), r1);
   LOperand* val = UseFixed(instr->value(), r0);
 
-  LInstruction* result = new LStoreNamedGeneric(obj, instr->name(), val);
+  LInstruction* result = new LStoreNamedGeneric(obj, val);
   return MarkAsCall(result, instr);
 }
 
@@ -1981,8 +1735,9 @@ LInstruction* LChunkBuilder::DoFunctionLiteral(HFunctionLiteral* instr) {
 
 
 LInstruction* LChunkBuilder::DoDeleteProperty(HDeleteProperty* instr) {
-  LInstruction* result = new LDeleteProperty(Use(instr->object()),
-                                             UseOrConstant(instr->key()));
+  LOperand* object = UseRegisterAtStart(instr->object());
+  LOperand* key = UseRegisterAtStart(instr->key());
+  LInstruction* result = new LDeleteProperty(object, key);
   return MarkAsCall(DefineFixed(result, r0), instr);
 }
 
@@ -2022,14 +1777,14 @@ LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
 LInstruction* LChunkBuilder::DoAccessArgumentsAt(HAccessArgumentsAt* instr) {
   LOperand* arguments = UseRegister(instr->arguments());
   LOperand* length = UseTempRegister(instr->length());
-  LOperand* index = Use(instr->index());
+  LOperand* index = UseRegister(instr->index());
   LInstruction* result = new LAccessArgumentsAt(arguments, length, index);
   return DefineAsRegister(AssignEnvironment(result));
 }
 
 
 LInstruction* LChunkBuilder::DoTypeof(HTypeof* instr) {
-  LInstruction* result = new LTypeof(Use(instr->value()));
+  LInstruction* result = new LTypeof(UseRegisterAtStart(instr->value()));
   return MarkAsCall(DefineFixed(result, r0), instr);
 }
 
@@ -2054,13 +1809,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
     }
   }
 
-  if (FLAG_trace_environment) {
-    PrintF("Reconstructed environment ast_id=%d, instr_id=%d\n",
-           instr->ast_id(),
-           instr->id());
-    env->PrintToStd();
-  }
-  ASSERT(env->values()->length() == instr->environment_height());
+  ASSERT(env->length() == instr->environment_length());
 
   // If there is an instruction pending deoptimization environment create a
   // lazy bailout instruction to capture the environment.
@@ -2102,21 +1851,4 @@ LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
 }
 
 
-void LPointerMap::RecordPointer(LOperand* op) {
-  // Do not record arguments as pointers.
-  if (op->IsStackSlot() && op->index() < 0) return;
-  ASSERT(!op->IsDoubleRegister() && !op->IsDoubleStackSlot());
-  pointer_operands_.Add(op);
-}
-
-
-void LPointerMap::PrintTo(StringStream* stream) const {
-  stream->Add("{");
-  for (int i = 0; i < pointer_operands_.length(); ++i) {
-    if (i != 0) stream->Add(";");
-    pointer_operands_[i]->PrintTo(stream);
-  }
-  stream->Add("} @%d", position());
-}
-
 } }  // namespace v8::internal

deps/v8/src/arm/lithium-arm.h

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -30,6 +30,7 @@
 
 #include "hydrogen.h"
 #include "lithium-allocator.h"
+#include "lithium.h"
 #include "safepoint-table.h"
 
 namespace v8 {
@@ -37,8 +38,6 @@ namespace internal {
 
 // Forward declarations.
 class LCodeGen;
-class LEnvironment;
-class Translation;
 
 
 // Type hierarchy:
@@ -62,6 +61,7 @@ class Translation;
 //     LDivI
 //     LInstanceOf
 //     LInstanceOfAndBranch
+//     LInstanceOfKnownGlobal
 //     LLoadKeyedFastElement
 //     LLoadKeyedGeneric
 //     LModI
@@ -76,6 +76,7 @@ class Translation;
 //   LCallNamed
 //   LCallRuntime
 //   LCallStub
+//   LCheckPrototypeMaps
 //   LConstant
 //     LConstantD
 //     LConstantI
@@ -85,7 +86,8 @@ class Translation;
 //   LGlobalObject
 //   LGlobalReceiver
 //   LLabel
-//   LLayzBailout
+//   LLazyBailout
+//   LLoadContextSlot
 //   LLoadGlobal
 //   LMaterializedLiteral
 //     LArrayLiteral
@@ -101,14 +103,14 @@ class Translation;
 //     LStoreNamedField
 //     LStoreNamedGeneric
 //   LUnaryOperation
-//     LArrayLength
+//     LJSArrayLength
+//     LFixedArrayLength
 //     LBitNotI
 //     LBranch
 //     LCallNew
 //     LCheckFunction
 //     LCheckInstanceType
 //     LCheckMap
-//     LCheckPrototypeMaps
 //     LCheckSmi
 //     LClassOfTest
 //     LClassOfTestAndBranch
@@ -127,6 +129,7 @@ class Translation;
 //     LIsSmiAndBranch
 //     LLoadNamedField
 //     LLoadNamedGeneric
+//     LLoadFunctionPrototype
 //     LNumberTagD
 //     LNumberTagI
 //     LPushArgument
@@ -161,7 +164,6 @@ class Translation;
   V(ArgumentsLength)                            \
   V(ArithmeticD)                                \
   V(ArithmeticT)                                \
-  V(ArrayLength)                                \
   V(ArrayLiteral)                               \
   V(BitI)                                       \
   V(BitNotI)                                    \
@@ -195,6 +197,7 @@ class Translation;
   V(Deoptimize)                                 \
   V(DivI)                                       \
   V(DoubleToI)                                  \
+  V(FixedArrayLength)                           \
   V(FunctionLiteral)                            \
   V(Gap)                                        \
   V(GlobalObject)                               \
@@ -202,6 +205,7 @@ class Translation;
   V(Goto)                                       \
   V(InstanceOf)                                 \
   V(InstanceOfAndBranch)                        \
+  V(InstanceOfKnownGlobal)                      \
   V(Integer32ToDouble)                          \
   V(IsNull)                                     \
   V(IsNullAndBranch)                            \
@@ -209,6 +213,7 @@ class Translation;
   V(IsObjectAndBranch)                          \
   V(IsSmi)                                      \
   V(IsSmiAndBranch)                             \
+  V(JSArrayLength)                              \
   V(HasInstanceType)                            \
   V(HasInstanceTypeAndBranch)                   \
   V(HasCachedArrayIndex)                        \
@@ -217,12 +222,14 @@ class Translation;
   V(ClassOfTestAndBranch)                       \
   V(Label)                                      \
   V(LazyBailout)                                \
+  V(LoadContextSlot)                            \
   V(LoadElements)                               \
   V(LoadGlobal)                                 \
   V(LoadKeyedFastElement)                       \
   V(LoadKeyedGeneric)                           \
   V(LoadNamedField)                             \
   V(LoadNamedGeneric)                           \
+  V(LoadFunctionPrototype)                      \
   V(ModI)                                       \
   V(MulI)                                       \
   V(NumberTagD)                                 \
@@ -325,53 +332,6 @@ class LInstruction: public ZoneObject {
 };
 
 
-class LGapNode;
-
-
-class LGapResolver BASE_EMBEDDED {
- public:
-  LGapResolver(const ZoneList<LMoveOperands>* moves, LOperand* marker_operand);
-  const ZoneList<LMoveOperands>* ResolveInReverseOrder();
-
- private:
-  LGapNode* LookupNode(LOperand* operand);
-  bool CanReach(LGapNode* a, LGapNode* b, int visited_id);
-  bool CanReach(LGapNode* a, LGapNode* b);
-  void RegisterMove(LMoveOperands move);
-  void AddResultMove(LOperand* from, LOperand* to);
-  void AddResultMove(LGapNode* from, LGapNode* to);
-  void ResolveCycle(LGapNode* start);
-
-  ZoneList<LGapNode*> nodes_;
-  ZoneList<LGapNode*> identified_cycles_;
-  ZoneList<LMoveOperands> result_;
-  LOperand* marker_operand_;
-  int next_visited_id_;
-  int bailout_after_ast_id_;
-};
-
-
-class LParallelMove : public ZoneObject {
- public:
-  LParallelMove() : move_operands_(4) { }
-
-  void AddMove(LOperand* from, LOperand* to) {
-    move_operands_.Add(LMoveOperands(from, to));
-  }
-
-  bool IsRedundant() const;
-
-  const ZoneList<LMoveOperands>* move_operands() const {
-    return &move_operands_;
-  }
-
-  void PrintDataTo(StringStream* stream) const;
-
- private:
-  ZoneList<LMoveOperands> move_operands_;
-};
-
-
 class LGap: public LInstruction {
  public:
   explicit LGap(HBasicBlock* block)
@@ -485,6 +445,10 @@ class LCallStub: public LInstruction {
  public:
   DECLARE_CONCRETE_INSTRUCTION(CallStub, "call-stub")
   DECLARE_HYDROGEN_ACCESSOR(CallStub)
+
+  TranscendentalCache::Type transcendental_type() {
+    return hydrogen()->transcendental_type();
+  }
 };
 
 
@@ -621,29 +585,26 @@ class LMulI: public LBinaryOperation {
 
 class LCmpID: public LBinaryOperation {
  public:
-  LCmpID(Token::Value op, LOperand* left, LOperand* right, bool is_double)
-      : LBinaryOperation(left, right), op_(op), is_double_(is_double) { }
+  LCmpID(LOperand* left, LOperand* right)
+      : LBinaryOperation(left, right) { }
 
-  Token::Value op() const { return op_; }
-  bool is_double() const { return is_double_; }
+  Token::Value op() const { return hydrogen()->token(); }
+  bool is_double() const {
+    return hydrogen()->GetInputRepresentation().IsDouble();
+  }
 
   DECLARE_CONCRETE_INSTRUCTION(CmpID, "cmp-id")
-
- private:
-  Token::Value op_;
-  bool is_double_;
+  DECLARE_HYDROGEN_ACCESSOR(Compare)
 };
 
 
 class LCmpIDAndBranch: public LCmpID {
  public:
-  LCmpIDAndBranch(Token::Value op,
-                  LOperand* left,
+  LCmpIDAndBranch(LOperand* left,
                   LOperand* right,
                   int true_block_id,
-                  int false_block_id,
-                  bool is_double)
-      : LCmpID(op, left, right, is_double),
+                  int false_block_id)
+      : LCmpID(left, right),
         true_block_id_(true_block_id),
         false_block_id_(false_block_id) { }
 
@@ -662,14 +623,18 @@ class LCmpIDAndBranch: public LCmpID {
 
 class LUnaryMathOperation: public LUnaryOperation {
  public:
-  explicit LUnaryMathOperation(LOperand* value)
-      : LUnaryOperation(value) { }
+  explicit LUnaryMathOperation(LOperand* value, LOperand* temp)
+      : LUnaryOperation(value), temp_(temp) { }
 
   DECLARE_CONCRETE_INSTRUCTION(UnaryMathOperation, "unary-math-operation")
   DECLARE_HYDROGEN_ACCESSOR(UnaryMathOperation)
 
   virtual void PrintDataTo(StringStream* stream) const;
   BuiltinFunctionId op() const { return hydrogen()->op(); }
+  LOperand* temp() const { return temp_; }
+
+ private:
+  LOperand* temp_;
 };
 
 
@@ -706,27 +671,21 @@ class LCmpJSObjectEqAndBranch: public LCmpJSObjectEq {
 
 class LIsNull: public LUnaryOperation {
  public:
-  LIsNull(LOperand* value, bool is_strict)
-      : LUnaryOperation(value), is_strict_(is_strict) {}
+  explicit LIsNull(LOperand* value) : LUnaryOperation(value) {}
 
   DECLARE_CONCRETE_INSTRUCTION(IsNull, "is-null")
+  DECLARE_HYDROGEN_ACCESSOR(IsNull);
 
-  bool is_strict() const { return is_strict_; }
-
- private:
-  bool is_strict_;
+  bool is_strict() const { return hydrogen()->is_strict(); }
 };
 
 
 class LIsNullAndBranch: public LIsNull {
  public:
   LIsNullAndBranch(LOperand* value,
-                   bool is_strict,
-                   LOperand* temp,
                    int true_block_id,
                    int false_block_id)
-      : LIsNull(value, is_strict),
-        temp_(temp),
+      : LIsNull(value),
         true_block_id_(true_block_id),
         false_block_id_(false_block_id) { }
 
@@ -737,10 +696,7 @@ class LIsNullAndBranch: public LIsNull {
   int true_block_id() const { return true_block_id_; }
   int false_block_id() const { return false_block_id_; }
 
-  LOperand* temp() const { return temp_; }
-
  private:
-  LOperand* temp_;
   int true_block_id_;
   int false_block_id_;
 };
@@ -835,11 +791,9 @@ class LHasInstanceType: public LUnaryOperation {
 class LHasInstanceTypeAndBranch: public LHasInstanceType {
  public:
   LHasInstanceTypeAndBranch(LOperand* value,
-                            LOperand* temporary,
                             int true_block_id,
                             int false_block_id)
       : LHasInstanceType(value),
-        temp_(temporary),
         true_block_id_(true_block_id),
         false_block_id_(false_block_id) { }
 
@@ -851,10 +805,7 @@ class LHasInstanceTypeAndBranch: public LHasInstanceType {
   int true_block_id() const { return true_block_id_; }
   int false_block_id() const { return false_block_id_; }
 
-  LOperand* temp() { return temp_; }
-
  private:
-  LOperand* temp_;
   int true_block_id_;
   int false_block_id_;
 };
@@ -894,18 +845,12 @@ class LHasCachedArrayIndexAndBranch: public LHasCachedArrayIndex {
 
 class LClassOfTest: public LUnaryOperation {
  public:
-  LClassOfTest(LOperand* value, LOperand* temp)
-      : LUnaryOperation(value), temporary_(temp) {}
+  explicit LClassOfTest(LOperand* value) : LUnaryOperation(value) {}
 
   DECLARE_CONCRETE_INSTRUCTION(ClassOfTest, "class-of-test")
   DECLARE_HYDROGEN_ACCESSOR(ClassOfTest)
 
   virtual void PrintDataTo(StringStream* stream) const;
-
-  LOperand* temporary() { return temporary_; }
-
- private:
-  LOperand *temporary_;
 };
 
 
@@ -913,11 +858,10 @@ class LClassOfTestAndBranch: public LClassOfTest {
  public:
   LClassOfTestAndBranch(LOperand* value,
                         LOperand* temporary,
-                        LOperand* temporary2,
                         int true_block_id,
                         int false_block_id)
-      : LClassOfTest(value, temporary),
-        temporary2_(temporary2),
+      : LClassOfTest(value),
+        temporary_(temporary),
         true_block_id_(true_block_id),
         false_block_id_(false_block_id) { }
 
@@ -928,10 +872,10 @@ class LClassOfTestAndBranch: public LClassOfTest {
 
   int true_block_id() const { return true_block_id_; }
   int false_block_id() const { return false_block_id_; }
-  LOperand* temporary2() { return temporary2_; }
+  LOperand* temporary() { return temporary_; }
 
  private:
-  LOperand* temporary2_;
+  LOperand* temporary_;
   int true_block_id_;
   int false_block_id_;
 };
@@ -999,6 +943,19 @@ class LInstanceOfAndBranch: public LInstanceOf {
 };
 
 
+class LInstanceOfKnownGlobal: public LUnaryOperation {
+ public:
+  explicit LInstanceOfKnownGlobal(LOperand* left)
+      : LUnaryOperation(left) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
+                               "instance-of-known-global")
+  DECLARE_HYDROGEN_ACCESSOR(InstanceOfKnownGlobal)
+
+  Handle<JSFunction> function() const { return hydrogen()->function(); }
+};
+
+
 class LBoundsCheck: public LBinaryOperation {
  public:
   LBoundsCheck(LOperand* index, LOperand* length)
@@ -1117,42 +1074,43 @@ class LBranch: public LUnaryOperation {
 
 class LCmpMapAndBranch: public LUnaryOperation {
  public:
-  LCmpMapAndBranch(LOperand* value,
-                   Handle<Map> map,
-                   int true_block_id,
-                   int false_block_id)
-      : LUnaryOperation(value),
-        map_(map),
-        true_block_id_(true_block_id),
-        false_block_id_(false_block_id) { }
+  LCmpMapAndBranch(LOperand* value, LOperand* temp)
+      : LUnaryOperation(value), temp_(temp) { }
 
   DECLARE_CONCRETE_INSTRUCTION(CmpMapAndBranch, "cmp-map-and-branch")
+  DECLARE_HYDROGEN_ACCESSOR(CompareMapAndBranch)
 
   virtual bool IsControl() const { return true; }
 
-  Handle<Map> map() const { return map_; }
-  int true_block_id() const { return true_block_id_; }
-  int false_block_id() const { return false_block_id_; }
+  LOperand* temp() const { return temp_; }
+  Handle<Map> map() const { return hydrogen()->map(); }
+  int true_block_id() const {
+    return hydrogen()->true_destination()->block_id();
+  }
+  int false_block_id() const {
+    return hydrogen()->false_destination()->block_id();
+  }
 
  private:
-  Handle<Map> map_;
-  int true_block_id_;
-  int false_block_id_;
+  LOperand* temp_;
 };
 
 
-class LArrayLength: public LUnaryOperation {
+class LJSArrayLength: public LUnaryOperation {
  public:
-  LArrayLength(LOperand* input, LOperand* temporary)
-      : LUnaryOperation(input), temporary_(temporary) { }
+  explicit LJSArrayLength(LOperand* input) : LUnaryOperation(input) { }
 
-  LOperand* temporary() const { return temporary_; }
+  DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js-array-length")
+  DECLARE_HYDROGEN_ACCESSOR(JSArrayLength)
+};
 
-  DECLARE_CONCRETE_INSTRUCTION(ArrayLength, "array-length")
-  DECLARE_HYDROGEN_ACCESSOR(ArrayLength)
 
- private:
-  LOperand* temporary_;
+class LFixedArrayLength: public LUnaryOperation {
+ public:
+  explicit LFixedArrayLength(LOperand* input) : LUnaryOperation(input) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(FixedArrayLength, "fixed-array-length")
+  DECLARE_HYDROGEN_ACCESSOR(FixedArrayLength)
 };
 
 
@@ -1256,6 +1214,18 @@ class LLoadNamedGeneric: public LUnaryOperation {
 };
 
 
+class LLoadFunctionPrototype: public LUnaryOperation {
+ public:
+  explicit LLoadFunctionPrototype(LOperand* function)
+      : LUnaryOperation(function) { }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load-function-prototype")
+  DECLARE_HYDROGEN_ACCESSOR(LoadFunctionPrototype)
+
+  LOperand* function() const { return input(); }
+};
+
+
 class LLoadElements: public LUnaryOperation {
  public:
   explicit LLoadElements(LOperand* obj) : LUnaryOperation(obj) { }
@@ -1266,21 +1236,14 @@ class LLoadElements: public LUnaryOperation {
 
 class LLoadKeyedFastElement: public LBinaryOperation {
  public:
-  LLoadKeyedFastElement(LOperand* elements,
-                        LOperand* key,
-                        LOperand* load_result)
-      : LBinaryOperation(elements, key),
-        load_result_(load_result) { }
+  LLoadKeyedFastElement(LOperand* elements, LOperand* key)
+      : LBinaryOperation(elements, key) { }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyedFastElement, "load-keyed-fast-element")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyedFastElement)
 
   LOperand* elements() const { return left(); }
   LOperand* key() const { return right(); }
-  LOperand* load_result() const { return load_result_; }
-
- private:
-  LOperand* load_result_;
 };
 
 
@@ -1312,6 +1275,20 @@ class LStoreGlobal: public LUnaryOperation {
 };
 
 
+class LLoadContextSlot: public LInstruction {
+ public:
+  DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load-context-slot")
+  DECLARE_HYDROGEN_ACCESSOR(LoadContextSlot)
+
+  int context_chain_length() const {
+    return hydrogen()->context_chain_length();
+  }
+  int slot_index() const { return hydrogen()->slot_index(); }
+
+  virtual void PrintDataTo(StringStream* stream);
+};
+
+
 class LPushArgument: public LUnaryOperation {
  public:
   explicit LPushArgument(LOperand* argument) : LUnaryOperation(argument) {}
@@ -1516,67 +1493,46 @@ class LSmiUntag: public LUnaryOperation {
 
 class LStoreNamed: public LInstruction {
  public:
-  LStoreNamed(LOperand* obj, Handle<Object> name, LOperand* val)
-      : object_(obj), name_(name), value_(val) { }
+  LStoreNamed(LOperand* obj, LOperand* val)
+      : object_(obj), value_(val) { }
 
   DECLARE_INSTRUCTION(StoreNamed)
+  DECLARE_HYDROGEN_ACCESSOR(StoreNamed)
 
   virtual void PrintDataTo(StringStream* stream) const;
 
   LOperand* object() const { return object_; }
-  Handle<Object> name() const { return name_; }
+  Handle<Object> name() const { return hydrogen()->name(); }
   LOperand* value() const { return value_; }
 
  private:
   LOperand* object_;
-  Handle<Object> name_;
   LOperand* value_;
 };
 
 
 class LStoreNamedField: public LStoreNamed {
  public:
-  LStoreNamedField(LOperand* obj,
-                   Handle<Object> name,
-                   LOperand* val,
-                   bool in_object,
-                   int offset,
-                   LOperand* temp,
-                   bool needs_write_barrier,
-                   Handle<Map> transition)
-      : LStoreNamed(obj, name, val),
-        is_in_object_(in_object),
-        offset_(offset),
-        temp_(temp),
-        needs_write_barrier_(needs_write_barrier),
-        transition_(transition) { }
+  LStoreNamedField(LOperand* obj, LOperand* val)
+      : LStoreNamed(obj, val) { }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedField, "store-named-field")
+  DECLARE_HYDROGEN_ACCESSOR(StoreNamedField)
 
-  bool is_in_object() { return is_in_object_; }
-  int offset() { return offset_; }
-  LOperand* temp() { return temp_; }
-  bool needs_write_barrier() { return needs_write_barrier_; }
-  Handle<Map> transition() const { return transition_; }
-  void set_transition(Handle<Map> map) { transition_ = map; }
-
- private:
-  bool is_in_object_;
-  int offset_;
-  LOperand* temp_;
-  bool needs_write_barrier_;
-  Handle<Map> transition_;
+  bool is_in_object() { return hydrogen()->is_in_object(); }
+  int offset() { return hydrogen()->offset(); }
+  bool needs_write_barrier() { return hydrogen()->NeedsWriteBarrier(); }
+  Handle<Map> transition() { return hydrogen()->transition(); }
 };
 
 
 class LStoreNamedGeneric: public LStoreNamed {
  public:
-  LStoreNamedGeneric(LOperand* obj,
-                     Handle<Object> name,
-                     LOperand* val)
-      : LStoreNamed(obj, name, val) { }
+  LStoreNamedGeneric(LOperand* obj, LOperand* val)
+      : LStoreNamed(obj, val) { }
 
   DECLARE_CONCRETE_INSTRUCTION(StoreNamedGeneric, "store-named-generic")
+  DECLARE_HYDROGEN_ACCESSOR(StoreNamedGeneric)
 };
 
 
@@ -1631,8 +1587,7 @@ class LCheckFunction: public LUnaryOperation {
 
 class LCheckInstanceType: public LUnaryOperation {
  public:
-  LCheckInstanceType(LOperand* use, LOperand* temp)
-      : LUnaryOperation(use), temp_(temp) { }
+  explicit LCheckInstanceType(LOperand* use) : LUnaryOperation(use) { }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckInstanceType, "check-instance-type")
   DECLARE_HYDROGEN_ACCESSOR(CheckInstanceType)
@@ -1655,23 +1610,21 @@ class LCheckMap: public LUnaryOperation {
 
 class LCheckPrototypeMaps: public LInstruction {
  public:
-  LCheckPrototypeMaps(LOperand* temp,
-                      Handle<JSObject> holder,
-                      Handle<Map> receiver_map)
-      : temp_(temp),
-        holder_(holder),
-        receiver_map_(receiver_map) { }
+  LCheckPrototypeMaps(LOperand* temp1, LOperand* temp2)
+      : temp1_(temp1), temp2_(temp2) { }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
+  DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
-  LOperand* temp() const { return temp_; }
-  Handle<JSObject> holder() const { return holder_; }
-  Handle<Map> receiver_map() const { return receiver_map_; }
+  Handle<JSObject> prototype() const { return hydrogen()->prototype(); }
+  Handle<JSObject> holder() const { return hydrogen()->holder(); }
+
+  LOperand* temp1() const { return temp1_; }
+  LOperand* temp2() const { return temp2_; }
 
  private:
-  LOperand* temp_;
-  Handle<JSObject> holder_;
-  Handle<Map> receiver_map_;
+  LOperand* temp1_;
+  LOperand* temp2_;
 };
 
 
@@ -1811,108 +1764,6 @@ class LStackCheck: public LInstruction {
 };
 
 
-class LPointerMap: public ZoneObject {
- public:
-  explicit LPointerMap(int position)
-      : pointer_operands_(8), position_(position), lithium_position_(-1) { }
-
-  const ZoneList<LOperand*>* operands() const { return &pointer_operands_; }
-  int position() const { return position_; }
-  int lithium_position() const { return lithium_position_; }
-
-  void set_lithium_position(int pos) {
-    ASSERT(lithium_position_ == -1);
-    lithium_position_ = pos;
-  }
-
-  void RecordPointer(LOperand* op);
-  void PrintTo(StringStream* stream) const;
-
- private:
-  ZoneList<LOperand*> pointer_operands_;
-  int position_;
-  int lithium_position_;
-};
-
-
-class LEnvironment: public ZoneObject {
- public:
-  LEnvironment(Handle<JSFunction> closure,
-               int ast_id,
-               int parameter_count,
-               int argument_count,
-               int value_count,
-               LEnvironment* outer)
-      : closure_(closure),
-        arguments_stack_height_(argument_count),
-        deoptimization_index_(Safepoint::kNoDeoptimizationIndex),
-        translation_index_(-1),
-        ast_id_(ast_id),
-        parameter_count_(parameter_count),
-        values_(value_count),
-        representations_(value_count),
-        spilled_registers_(NULL),
-        spilled_double_registers_(NULL),
-        outer_(outer) {
-  }
-
-  Handle<JSFunction> closure() const { return closure_; }
-  int arguments_stack_height() const { return arguments_stack_height_; }
-  int deoptimization_index() const { return deoptimization_index_; }
-  int translation_index() const { return translation_index_; }
-  int ast_id() const { return ast_id_; }
-  int parameter_count() const { return parameter_count_; }
-  const ZoneList<LOperand*>* values() const { return &values_; }
-  LEnvironment* outer() const { return outer_; }
-
-  void AddValue(LOperand* operand, Representation representation) {
-    values_.Add(operand);
-    representations_.Add(representation);
-  }
-
-  bool HasTaggedValueAt(int index) const {
-    return representations_[index].IsTagged();
-  }
-
-  void Register(int deoptimization_index, int translation_index) {
-    ASSERT(!HasBeenRegistered());
-    deoptimization_index_ = deoptimization_index;
-    translation_index_ = translation_index;
-  }
-  bool HasBeenRegistered() const {
-    return deoptimization_index_ != Safepoint::kNoDeoptimizationIndex;
-  }
-
-  void SetSpilledRegisters(LOperand** registers,
-                           LOperand** double_registers) {
-    spilled_registers_ = registers;
-    spilled_double_registers_ = double_registers;
-  }
-
-  // Emit frame translation commands for this environment.
-  void WriteTranslation(LCodeGen* cgen, Translation* translation) const;
-
-  void PrintTo(StringStream* stream) const;
-
- private:
-  Handle<JSFunction> closure_;
-  int arguments_stack_height_;
-  int deoptimization_index_;
-  int translation_index_;
-  int ast_id_;
-  int parameter_count_;
-  ZoneList<LOperand*> values_;
-  ZoneList<Representation> representations_;
-
-  // Allocation index indexed arrays of spill slot operands for registers
-  // that are also in spill slots at an OSR entry.  NULL for environments
-  // that do not correspond to an OSR entry.
-  LOperand** spilled_registers_;
-  LOperand** spilled_double_registers_;
-
-  LEnvironment* outer_;
-};
-
 class LChunkBuilder;
 class LChunk: public ZoneObject {
  public:
@@ -2051,7 +1902,6 @@ class LChunkBuilder BASE_EMBEDDED {
   LInstruction* Define(LInstruction* instr);
   LInstruction* DefineAsRegister(LInstruction* instr);
   LInstruction* DefineAsSpilled(LInstruction* instr, int index);
-  LInstruction* DefineSameAsAny(LInstruction* instr);
   LInstruction* DefineSameAsFirst(LInstruction* instr);
   LInstruction* DefineFixed(LInstruction* instr, Register reg);
   LInstruction* DefineFixedDouble(LInstruction* instr, DoubleRegister reg);
@@ -2074,8 +1924,6 @@ class LChunkBuilder BASE_EMBEDDED {
 
   LEnvironment* CreateEnvironment(HEnvironment* hydrogen_env);
 
-  // Temporary operand that may be a memory location.
-  LOperand* Temp();
   // Temporary operand that must be in a register.
   LUnallocated* TempRegister();
   LOperand* FixedTemp(Register reg);

deps/v8/src/arm/lithium-codegen-arm.h

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -39,8 +39,30 @@ namespace internal {
 
 // Forward declarations.
 class LDeferredCode;
+class LGapNode;
 class SafepointGenerator;
 
+class LGapResolver BASE_EMBEDDED {
+ public:
+  LGapResolver();
+  const ZoneList<LMoveOperands>* Resolve(const ZoneList<LMoveOperands>* moves,
+                                         LOperand* marker_operand);
+
+ private:
+  LGapNode* LookupNode(LOperand* operand);
+  bool CanReach(LGapNode* a, LGapNode* b, int visited_id);
+  bool CanReach(LGapNode* a, LGapNode* b);
+  void RegisterMove(LMoveOperands move);
+  void AddResultMove(LOperand* from, LOperand* to);
+  void AddResultMove(LGapNode* from, LGapNode* to);
+  void ResolveCycle(LGapNode* start, LOperand* marker_operand);
+
+  ZoneList<LGapNode*> nodes_;
+  ZoneList<LGapNode*> identified_cycles_;
+  ZoneList<LMoveOperands> result_;
+  int next_visited_id_;
+};
+
 
 class LCodeGen BASE_EMBEDDED {
  public:
@@ -71,6 +93,7 @@ class LCodeGen BASE_EMBEDDED {
   void FinishCode(Handle<Code> code);
 
   // Deferred code support.
+  void DoDeferredGenericBinaryStub(LBinaryOperation* instr, Token::Value op);
   void DoDeferredNumberTagD(LNumberTagD* instr);
   void DoDeferredNumberTagI(LNumberTagI* instr);
   void DoDeferredTaggedToI(LTaggedToI* instr);
@@ -80,6 +103,9 @@ class LCodeGen BASE_EMBEDDED {
   // Parallel move support.
   void DoParallelMove(LParallelMove* move);
 
+  // Emit frame translation commands for an environment.
+  void WriteTranslation(LEnvironment* environment, Translation* translation);
+
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
@@ -103,6 +129,9 @@ class LCodeGen BASE_EMBEDDED {
   HGraph* graph() const { return chunk_->graph(); }
   MacroAssembler* masm() const { return masm_; }
 
+  Register scratch0() { return r9; }
+  DwVfpRegister double_scratch0() { return d0; }
+
   int GetNextEmittedBlock(int block);
   LInstruction* GetNextInstruction();
 
@@ -147,7 +176,7 @@ class LCodeGen BASE_EMBEDDED {
                          int arity,
                          LInstruction* instr);
 
-  void LoadPrototype(Register result, Handle<JSObject> prototype);
+  void LoadHeapObject(Register result, Handle<HeapObject> object);
 
   void RegisterLazyDeoptimization(LInstruction* instr);
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
@@ -192,6 +221,9 @@ class LCodeGen BASE_EMBEDDED {
   void RecordSafepointWithRegisters(LPointerMap* pointers,
                                     int arguments,
                                     int deoptimization_index);
+  void RecordSafepointWithRegistersAndDoubles(LPointerMap* pointers,
+                                              int arguments,
+                                              int deoptimization_index);
   void RecordPosition(int position);
 
   static Condition TokenToCondition(Token::Value op, bool is_unsigned);
@@ -237,6 +269,9 @@ class LCodeGen BASE_EMBEDDED {
   // itself is emitted at the end of the generated code.
   SafepointTableBuilder safepoints_;
 
+  // Compiler from a set of parallel moves to a sequential list of moves.
+  LGapResolver resolver_;
+
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;

deps/v8/src/arm/macro-assembler-arm.cc

@@ -466,6 +466,25 @@ void MacroAssembler::PopSafepointRegisters() {
 }
 
 
+void MacroAssembler::PushSafepointRegistersAndDoubles() {
+  PushSafepointRegisters();
+  sub(sp, sp, Operand(DwVfpRegister::kNumAllocatableRegisters *
+                      kDoubleSize));
+  for (int i = 0; i < DwVfpRegister::kNumAllocatableRegisters; i++) {
+    vstr(DwVfpRegister::FromAllocationIndex(i), sp, i * kDoubleSize);
+  }
+}
+
+
+void MacroAssembler::PopSafepointRegistersAndDoubles() {
+  for (int i = 0; i < DwVfpRegister::kNumAllocatableRegisters; i++) {
+    vldr(DwVfpRegister::FromAllocationIndex(i), sp, i * kDoubleSize);
+  }
+  add(sp, sp, Operand(DwVfpRegister::kNumAllocatableRegisters *
+                      kDoubleSize));
+  PopSafepointRegisters();
+}
+
 int MacroAssembler::SafepointRegisterStackIndex(int reg_code) {
   // The registers are pushed starting with the highest encoding,
   // which means that lowest encodings are closest to the stack pointer.
@@ -519,6 +538,49 @@ void MacroAssembler::Strd(Register src1, Register src2,
 }
 
 
+void MacroAssembler::ClearFPSCRBits(const uint32_t bits_to_clear,
+                                    const Register scratch,
+                                    const Condition cond) {
+  vmrs(scratch, cond);
+  bic(scratch, scratch, Operand(bits_to_clear), LeaveCC, cond);
+  vmsr(scratch, cond);
+}
+
+
+void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1,
+                                           const DwVfpRegister src2,
+                                           const Condition cond) {
+  // Compare and move FPSCR flags to the normal condition flags.
+  VFPCompareAndLoadFlags(src1, src2, pc, cond);
+}
+
+void MacroAssembler::VFPCompareAndSetFlags(const DwVfpRegister src1,
+                                           const double src2,
+                                           const Condition cond) {
+  // Compare and move FPSCR flags to the normal condition flags.
+  VFPCompareAndLoadFlags(src1, src2, pc, cond);
+}
+
+
+void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1,
+                                            const DwVfpRegister src2,
+                                            const Register fpscr_flags,
+                                            const Condition cond) {
+  // Compare and load FPSCR.
+  vcmp(src1, src2, cond);
+  vmrs(fpscr_flags, cond);
+}
+
+void MacroAssembler::VFPCompareAndLoadFlags(const DwVfpRegister src1,
+                                            const double src2,
+                                            const Register fpscr_flags,
+                                            const Condition cond) {
+  // Compare and load FPSCR.
+  vcmp(src1, src2, cond);
+  vmrs(fpscr_flags, cond);
+}
+
+
 void MacroAssembler::EnterFrame(StackFrame::Type type) {
   // r0-r3: preserved
   stm(db_w, sp, cp.bit() | fp.bit() | lr.bit());
@@ -675,7 +737,8 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
                                     Handle<Code> code_constant,
                                     Register code_reg,
                                     Label* done,
-                                    InvokeFlag flag) {
+                                    InvokeFlag flag,
+                                    PostCallGenerator* post_call_generator) {
   bool definitely_matches = false;
   Label regular_invoke;
 
@@ -731,6 +794,7 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
         Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline));
     if (flag == CALL_FUNCTION) {
       Call(adaptor, RelocInfo::CODE_TARGET);
+      if (post_call_generator != NULL) post_call_generator->Generate();
       b(done);
     } else {
       Jump(adaptor, RelocInfo::CODE_TARGET);
@@ -743,12 +807,15 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
 void MacroAssembler::InvokeCode(Register code,
                                 const ParameterCount& expected,
                                 const ParameterCount& actual,
-                                InvokeFlag flag) {
+                                InvokeFlag flag,
+                                PostCallGenerator* post_call_generator) {
   Label done;
 
-  InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag);
+  InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag,
+                 post_call_generator);
   if (flag == CALL_FUNCTION) {
     Call(code);
+    if (post_call_generator != NULL) post_call_generator->Generate();
   } else {
     ASSERT(flag == JUMP_FUNCTION);
     Jump(code);
@@ -782,7 +849,8 @@ void MacroAssembler::InvokeCode(Handle<Code> code,
 
 void MacroAssembler::InvokeFunction(Register fun,
                                     const ParameterCount& actual,
-                                    InvokeFlag flag) {
+                                    InvokeFlag flag,
+                                    PostCallGenerator* post_call_generator) {
   // Contract with called JS functions requires that function is passed in r1.
   ASSERT(fun.is(r1));
 
@@ -799,7 +867,7 @@ void MacroAssembler::InvokeFunction(Register fun,
       FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
 
   ParameterCount expected(expected_reg);
-  InvokeCode(code_reg, expected, actual, flag);
+  InvokeCode(code_reg, expected, actual, flag, post_call_generator);
 }
 
 
@@ -1669,10 +1737,12 @@ void MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) {
 
 
 void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id,
-                                   InvokeJSFlags flags) {
+                                   InvokeJSFlags flags,
+                                   PostCallGenerator* post_call_generator) {
   GetBuiltinEntry(r2, id);
   if (flags == CALL_JS) {
     Call(r2);
+    if (post_call_generator != NULL) post_call_generator->Generate();
   } else {
     ASSERT(flags == JUMP_JS);
     Jump(r2);
@@ -1795,7 +1865,7 @@ void MacroAssembler::Abort(const char* msg) {
   }
 #endif
   // Disable stub call restrictions to always allow calls to abort.
-  set_allow_stub_calls(true);
+  AllowStubCallsScope allow_scope(this, true);
 
   mov(r0, Operand(p0));
   push(r0);

deps/v8/src/arm/macro-assembler-arm.h

@@ -33,6 +33,9 @@
 namespace v8 {
 namespace internal {
 
+// Forward declaration.
+class PostCallGenerator;
+
 // ----------------------------------------------------------------------------
 // Static helper functions
 
@@ -229,6 +232,9 @@ class MacroAssembler: public Assembler {
   // RegList constant kSafepointSavedRegisters.
   void PushSafepointRegisters();
   void PopSafepointRegisters();
+  void PushSafepointRegistersAndDoubles();
+  void PopSafepointRegistersAndDoubles();
+
   static int SafepointRegisterStackIndex(int reg_code);
 
   // Load two consecutive registers with two consecutive memory locations.
@@ -243,6 +249,30 @@ class MacroAssembler: public Assembler {
             const MemOperand& dst,
             Condition cond = al);
 
+  // Clear specified FPSCR bits.
+  void ClearFPSCRBits(const uint32_t bits_to_clear,
+                      const Register scratch,
+                      const Condition cond = al);
+
+  // Compare double values and move the result to the normal condition flags.
+  void VFPCompareAndSetFlags(const DwVfpRegister src1,
+                             const DwVfpRegister src2,
+                             const Condition cond = al);
+  void VFPCompareAndSetFlags(const DwVfpRegister src1,
+                             const double src2,
+                             const Condition cond = al);
+
+  // Compare double values and then load the fpscr flags to a register.
+  void VFPCompareAndLoadFlags(const DwVfpRegister src1,
+                              const DwVfpRegister src2,
+                              const Register fpscr_flags,
+                              const Condition cond = al);
+  void VFPCompareAndLoadFlags(const DwVfpRegister src1,
+                              const double src2,
+                              const Register fpscr_flags,
+                              const Condition cond = al);
+
+
   // ---------------------------------------------------------------------------
   // Activation frames
 
@@ -281,7 +311,8 @@ class MacroAssembler: public Assembler {
   void InvokeCode(Register code,
                   const ParameterCount& expected,
                   const ParameterCount& actual,
-                  InvokeFlag flag);
+                  InvokeFlag flag,
+                  PostCallGenerator* post_call_generator = NULL);
 
   void InvokeCode(Handle<Code> code,
                   const ParameterCount& expected,
@@ -293,7 +324,8 @@ class MacroAssembler: public Assembler {
   // current context to the context in the function before invoking.
   void InvokeFunction(Register function,
                       const ParameterCount& actual,
-                      InvokeFlag flag);
+                      InvokeFlag flag,
+                      PostCallGenerator* post_call_generator = NULL);
 
   void InvokeFunction(JSFunction* function,
                       const ParameterCount& actual,
@@ -379,12 +411,13 @@ class MacroAssembler: public Assembler {
   // ---------------------------------------------------------------------------
   // Allocation support
 
-  // Allocate an object in new space. The object_size is specified in words (not
-  // bytes). If the new space is exhausted control continues at the gc_required
-  // label. The allocated object is returned in result. If the flag
-  // tag_allocated_object is true the result is tagged as as a heap object. All
-  // registers are clobbered also when control continues at the gc_required
-  // label.
+  // Allocate an object in new space. The object_size is specified
+  // either in bytes or in words if the allocation flag SIZE_IN_WORDS
+  // is passed. If the new space is exhausted control continues at the
+  // gc_required label. The allocated object is returned in result. If
+  // the flag tag_allocated_object is true the result is tagged as as
+  // a heap object. All registers are clobbered also when control
+  // continues at the gc_required label.
   void AllocateInNewSpace(int object_size,
                           Register result,
                           Register scratch1,
@@ -633,7 +666,9 @@ class MacroAssembler: public Assembler {
 
   // Invoke specified builtin JavaScript function. Adds an entry to
   // the unresolved list if the name does not resolve.
-  void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags);
+  void InvokeBuiltin(Builtins::JavaScript id,
+                     InvokeJSFlags flags,
+                     PostCallGenerator* post_call_generator = NULL);
 
   // Store the code object for the given builtin in the target register and
   // setup the function in r1.
@@ -684,6 +719,16 @@ class MacroAssembler: public Assembler {
     add(reg, reg, Operand(reg), s);
   }
 
+  // Try to convert int32 to smi. If the value is to large, preserve
+  // the original value and jump to not_a_smi. Destroys scratch and
+  // sets flags.
+  void TrySmiTag(Register reg, Label* not_a_smi, Register scratch) {
+    mov(scratch, reg);
+    SmiTag(scratch, SetCC);
+    b(vs, not_a_smi);
+    mov(reg, scratch);
+  }
+
   void SmiUntag(Register reg) {
     mov(reg, Operand(reg, ASR, kSmiTagSize));
   }
@@ -741,7 +786,8 @@ class MacroAssembler: public Assembler {
                       Handle<Code> code_constant,
                       Register code_reg,
                       Label* done,
-                      InvokeFlag flag);
+                      InvokeFlag flag,
+                      PostCallGenerator* post_call_generator = NULL);
 
   // Activation support.
   void EnterFrame(StackFrame::Type type);

deps/v8/src/arm/regexp-macro-assembler-arm.cc

@@ -417,8 +417,8 @@ void RegExpMacroAssemblerARM::CheckNotBackReference(
 
 
 void RegExpMacroAssemblerARM::CheckNotRegistersEqual(int reg1,
-                                                      int reg2,
-                                                      Label* on_not_equal) {
+                                                     int reg2,
+                                                     Label* on_not_equal) {
   __ ldr(r0, register_location(reg1));
   __ ldr(r1, register_location(reg2));
   __ cmp(r0, r1);
@@ -426,7 +426,7 @@ void RegExpMacroAssemblerARM::CheckNotRegistersEqual(int reg1,
 }
 
 
-void RegExpMacroAssemblerARM::CheckNotCharacter(uint32_t c,
+void RegExpMacroAssemblerARM::CheckNotCharacter(unsigned c,
                                                 Label* on_not_equal) {
   __ cmp(current_character(), Operand(c));
   BranchOrBacktrack(ne, on_not_equal);
@@ -442,8 +442,8 @@ void RegExpMacroAssemblerARM::CheckCharacterAfterAnd(uint32_t c,
 }
 
 
-void RegExpMacroAssemblerARM::CheckNotCharacterAfterAnd(uint32_t c,
-                                                        uint32_t mask,
+void RegExpMacroAssemblerARM::CheckNotCharacterAfterAnd(unsigned c,
+                                                        unsigned mask,
                                                         Label* on_not_equal) {
   __ and_(r0, current_character(), Operand(mask));
   __ cmp(r0, Operand(c));

deps/v8/src/arm/regexp-macro-assembler-arm.h

@@ -50,9 +50,9 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   virtual void Backtrack();
   virtual void Bind(Label* label);
   virtual void CheckAtStart(Label* on_at_start);
-  virtual void CheckCharacter(uint32_t c, Label* on_equal);
-  virtual void CheckCharacterAfterAnd(uint32_t c,
-                                      uint32_t mask,
+  virtual void CheckCharacter(unsigned c, Label* on_equal);
+  virtual void CheckCharacterAfterAnd(unsigned c,
+                                      unsigned mask,
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
   virtual void CheckCharacterLT(uc16 limit, Label* on_less);
@@ -68,9 +68,9 @@ class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
   virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
                                                Label* on_no_match);
   virtual void CheckNotRegistersEqual(int reg1, int reg2, Label* on_not_equal);
-  virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal);
-  virtual void CheckNotCharacterAfterAnd(uint32_t c,
-                                         uint32_t mask,
+  virtual void CheckNotCharacter(unsigned c, Label* on_not_equal);
+  virtual void CheckNotCharacterAfterAnd(unsigned c,
+                                         unsigned mask,
                                          Label* on_not_equal);
   virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
                                               uc16 minus,

deps/v8/src/arm/simulator-arm.cc

@@ -2600,11 +2600,6 @@ void Simulator::DecodeVCMP(Instr* instr) {
     precision = kDoublePrecision;
   }
 
-  if (instr->Bit(7) != 0) {
-    // Raising exceptions for quiet NaNs are not supported.
-    UNIMPLEMENTED();  // Not used by V8.
-  }
-
   int d = instr->VFPDRegCode(precision);
   int m = 0;
   if (instr->Opc2Field() == 0x4) {
@@ -2618,6 +2613,13 @@ void Simulator::DecodeVCMP(Instr* instr) {
       dm_value = get_double_from_d_register(m);
     }
 
+    // Raise exceptions for quiet NaNs if necessary.
+    if (instr->Bit(7) == 1) {
+      if (isnan(dd_value)) {
+        inv_op_vfp_flag_ = true;
+      }
+    }
+
     Compute_FPSCR_Flags(dd_value, dm_value);
   } else {
     UNIMPLEMENTED();  // Not used by V8.

deps/v8/src/arm/stub-cache-arm.cc

@@ -1952,7 +1952,7 @@ MaybeObject* CallStubCompiler::CompileMathFloorCall(Object* object,
   __ cmp(r7, Operand(HeapNumber::kMantissaBits));
   // If greater or equal, the argument is already round and in r0.
   __ b(&restore_fpscr_and_return, ge);
-  __ b(&slow);
+  __ b(&wont_fit_smi);
 
   __ bind(&no_vfp_exception);
   // Move the result back to general purpose register r0.
@@ -1965,7 +1965,7 @@ MaybeObject* CallStubCompiler::CompileMathFloorCall(Object* object,
   __ mov(r0, Operand(r0, LSL, kSmiTagSize));
 
   // Check for -0.
-  __ cmp(r0, Operand(0));
+  __ cmp(r0, Operand(0, RelocInfo::NONE));
   __ b(&restore_fpscr_and_return, ne);
   // r5 already holds the HeapNumber exponent.
   __ tst(r5, Operand(HeapNumber::kSignMask));
@@ -1980,10 +1980,10 @@ MaybeObject* CallStubCompiler::CompileMathFloorCall(Object* object,
   __ Ret();
 
   __ bind(&wont_fit_smi);
-  __ bind(&slow);
   // Restore FPCSR and fall to slow case.
   __ vmsr(r3);
 
+  __ bind(&slow);
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   __ InvokeFunction(function, arguments(), JUMP_FUNCTION);

deps/v8/src/array.js

@@ -117,41 +117,59 @@ function Join(array, length, separator, convert) {
     // Fast case for one-element arrays.
     if (length == 1) {
       var e = array[0];
-      if (!IS_UNDEFINED(e) || (0 in array)) {
-        if (IS_STRING(e)) return e;
-        return convert(e);
-      }
+      if (IS_STRING(e)) return e;
+      return convert(e);
     }
 
     // Construct an array for the elements.
-    var elements;
-    var elements_length = 0;
+    var elements = new $Array(length);
 
     // We pull the empty separator check outside the loop for speed!
     if (separator.length == 0) {
-      elements = new $Array(length);
+      var elements_length = 0;
       for (var i = 0; i < length; i++) {
         var e = array[i];
-        if (!IS_UNDEFINED(e) || (i in array)) {
+        if (!IS_UNDEFINED(e)) {
           if (!IS_STRING(e)) e = convert(e);
           elements[elements_length++] = e;
         }
       }
+      elements.length = elements_length;
+      var result = %_FastAsciiArrayJoin(elements, '');
+      if (!IS_UNDEFINED(result)) return result;
+      return %StringBuilderConcat(elements, elements_length, '');
+    }
+    // Non-empty separator case.
+    // If the first element is a number then use the heuristic that the 
+    // remaining elements are also likely to be numbers.
+    if (!IS_NUMBER(array[0])) {
+      for (var i = 0; i < length; i++) {
+        var e = array[i];
+        if (!IS_STRING(e)) e = convert(e);
+        elements[i] = e;
+      }
     } else { 
-      elements = new $Array(length << 1);
       for (var i = 0; i < length; i++) {
         var e = array[i];
-        if (i != 0) elements[elements_length++] = separator;
-        if (!IS_UNDEFINED(e) || (i in array)) {
+        if (IS_NUMBER(e)) elements[i] = %_NumberToString(e);
+        else {
           if (!IS_STRING(e)) e = convert(e);
-          elements[elements_length++] = e;
+          elements[i] = e;
         }
       }
     }   
-    elements.length = elements_length;
-    var result = %_FastAsciiArrayJoin(elements, "");
+    var result = %_FastAsciiArrayJoin(elements, separator);
     if (!IS_UNDEFINED(result)) return result;   
-    return %StringBuilderConcat(elements, elements_length, '');
+
+    var length2 = (length << 1) - 1;
+    var j = length2;
+    var i = length;
+    elements[--j] = elements[--i];
+    while (i > 0) {
+      elements[--j] = separator;
+      elements[--j] = elements[--i];
+    }
+    return %StringBuilderConcat(elements, length2, '');    
   } finally {
     // Make sure to pop the visited array no matter what happens.
     if (is_array) visited_arrays.pop();
@@ -160,7 +178,7 @@ function Join(array, length, separator, convert) {
 
 
 function ConvertToString(x) {
-  if (IS_STRING(x)) return x;
+  // Assumes x is a non-string. 
   if (IS_NUMBER(x)) return %_NumberToString(x);
   if (IS_BOOLEAN(x)) return x ? 'true' : 'false';
   return (IS_NULL_OR_UNDEFINED(x)) ? '' : %ToString(%DefaultString(x));

deps/v8/src/assembler.cc

@@ -66,6 +66,7 @@ namespace internal {
 
 const double DoubleConstant::min_int = kMinInt;
 const double DoubleConstant::one_half = 0.5;
+const double DoubleConstant::minus_zero = -0.0;
 const double DoubleConstant::negative_infinity = -V8_INFINITY;
 
 
@@ -647,6 +648,11 @@ ExternalReference ExternalReference::the_hole_value_location() {
 }
 
 
+ExternalReference ExternalReference::arguments_marker_location() {
+  return ExternalReference(Factory::arguments_marker().location());
+}
+
+
 ExternalReference ExternalReference::roots_address() {
   return ExternalReference(Heap::roots_address());
 }
@@ -724,6 +730,12 @@ ExternalReference ExternalReference::address_of_one_half() {
 }
 
 
+ExternalReference ExternalReference::address_of_minus_zero() {
+  return ExternalReference(reinterpret_cast<void*>(
+      const_cast<double*>(&DoubleConstant::minus_zero)));
+}
+
+
 ExternalReference ExternalReference::address_of_negative_infinity() {
   return ExternalReference(reinterpret_cast<void*>(
       const_cast<double*>(&DoubleConstant::negative_infinity)));

deps/v8/src/assembler.h

@@ -50,6 +50,7 @@ class DoubleConstant: public AllStatic {
  public:
   static const double min_int;
   static const double one_half;
+  static const double minus_zero;
   static const double negative_infinity;
 };
 
@@ -512,6 +513,9 @@ class ExternalReference BASE_EMBEDDED {
   // Static variable Factory::the_hole_value.location()
   static ExternalReference the_hole_value_location();
 
+  // Static variable Factory::arguments_marker.location()
+  static ExternalReference arguments_marker_location();
+
   // Static variable Heap::roots_address()
   static ExternalReference roots_address();
 
@@ -552,6 +556,7 @@ class ExternalReference BASE_EMBEDDED {
   // Static variables containing common double constants.
   static ExternalReference address_of_min_int();
   static ExternalReference address_of_one_half();
+  static ExternalReference address_of_minus_zero();
   static ExternalReference address_of_negative_infinity();
 
   Address address() const {return reinterpret_cast<Address>(address_);}

deps/v8/src/ast.cc

@@ -166,12 +166,6 @@ bool FunctionLiteral::AllowsLazyCompilation() {
 }
 
 
-bool FunctionLiteral::AllowOptimize() {
-  // We can't deal with heap-allocated locals.
-  return scope()->num_heap_slots() == 0;
-}
-
-
 ObjectLiteral::Property::Property(Literal* key, Expression* value) {
   emit_store_ = true;
   key_ = key;
@@ -215,12 +209,16 @@ bool ObjectLiteral::Property::emit_store() {
 
 
 bool IsEqualString(void* first, void* second) {
+  ASSERT((*reinterpret_cast<String**>(first))->IsString());
+  ASSERT((*reinterpret_cast<String**>(second))->IsString());
   Handle<String> h1(reinterpret_cast<String**>(first));
   Handle<String> h2(reinterpret_cast<String**>(second));
   return (*h1)->Equals(*h2);
 }
 
 bool IsEqualSmi(void* first, void* second) {
+  ASSERT((*reinterpret_cast<Smi**>(first))->IsSmi());
+  ASSERT((*reinterpret_cast<Smi**>(second))->IsSmi());
   Handle<Smi> h1(reinterpret_cast<Smi**>(first));
   Handle<Smi> h2(reinterpret_cast<Smi**>(second));
   return (*h1)->value() == (*h2)->value();
@@ -266,12 +264,12 @@ void ObjectLiteral::CalculateEmitStore() {
     // If the key of a computed property is in the table, do not emit
     // a store for the property later.
     if (property->kind() == ObjectLiteral::Property::COMPUTED) {
-      if (table->Lookup(literal, hash, false) != NULL) {
+      if (table->Lookup(key, hash, false) != NULL) {
         property->set_emit_store(false);
       }
     }
     // Add key to the table.
-    table->Lookup(literal, hash, true);
+    table->Lookup(key, hash, true);
   }
 }
 
@@ -517,6 +515,9 @@ void Property::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
   if (key()->IsPropertyName()) {
     if (oracle->LoadIsBuiltin(this, Builtins::LoadIC_ArrayLength)) {
       is_array_length_ = true;
+    } else if (oracle->LoadIsBuiltin(this,
+                                     Builtins::LoadIC_FunctionPrototype)) {
+      is_function_prototype_ = true;
     } else {
       Literal* lit_key = key()->AsLiteral();
       ASSERT(lit_key != NULL && lit_key->handle()->IsString());
@@ -638,10 +639,19 @@ void Call::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
     }
   }
 #endif
-  if (receiver_types_ != NULL && receiver_types_->length() > 0) {
-    Handle<Map> type = receiver_types_->at(0);
-    is_monomorphic_ = oracle->CallIsMonomorphic(this);
-    if (is_monomorphic_) is_monomorphic_ = ComputeTarget(type, name);
+  is_monomorphic_ = oracle->CallIsMonomorphic(this);
+  check_type_ = oracle->GetCallCheckType(this);
+  if (is_monomorphic_) {
+    Handle<Map> map;
+    if (receiver_types_ != NULL && receiver_types_->length() > 0) {
+      ASSERT(check_type_ == RECEIVER_MAP_CHECK);
+      map = receiver_types_->at(0);
+    } else {
+      ASSERT(check_type_ != RECEIVER_MAP_CHECK);
+      map = Handle<Map>(
+          oracle->GetPrototypeForPrimitiveCheck(check_type_)->map());
+    }
+    is_monomorphic_ = ComputeTarget(map, name);
   }
 }
 

deps/v8/src/ast.h

@@ -1208,6 +1208,7 @@ class Property: public Expression {
         is_monomorphic_(false),
         receiver_types_(NULL),
         is_array_length_(false),
+        is_function_prototype_(false),
         is_arguments_access_(false) { }
 
   DECLARE_NODE_TYPE(Property)
@@ -1220,6 +1221,8 @@ class Property: public Expression {
   int position() const { return pos_; }
   bool is_synthetic() const { return type_ == SYNTHETIC; }
 
+  bool IsFunctionPrototype() const { return is_function_prototype_; }
+
   // Marks that this is actually an argument rewritten to a keyed property
   // accessing the argument through the arguments shadow object.
   void set_is_arguments_access(bool is_arguments_access) {
@@ -1249,6 +1252,7 @@ class Property: public Expression {
   bool is_monomorphic_;
   ZoneMapList* receiver_types_;
   bool is_array_length_;
+  bool is_function_prototype_;
   bool is_arguments_access_;
   Handle<Map> monomorphic_receiver_type_;
 
@@ -1264,6 +1268,7 @@ class Call: public Expression {
         arguments_(arguments),
         pos_(pos),
         is_monomorphic_(false),
+        check_type_(RECEIVER_MAP_CHECK),
         receiver_types_(NULL),
         return_id_(GetNextId()) {
   }
@@ -1279,6 +1284,7 @@ class Call: public Expression {
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   virtual ZoneMapList* GetReceiverTypes() { return receiver_types_; }
   virtual bool IsMonomorphic() { return is_monomorphic_; }
+  CheckType check_type() const { return check_type_; }
   Handle<JSFunction> target() { return target_; }
   Handle<JSObject> holder() { return holder_; }
   Handle<JSGlobalPropertyCell> cell() { return cell_; }
@@ -1302,6 +1308,7 @@ class Call: public Expression {
   int pos_;
 
   bool is_monomorphic_;
+  CheckType check_type_;
   ZoneMapList* receiver_types_;
   Handle<JSFunction> target_;
   Handle<JSObject> holder_;
@@ -1391,7 +1398,7 @@ class BinaryOperation: public Expression {
       : op_(op), left_(left), right_(right), pos_(pos), is_smi_only_(false) {
     ASSERT(Token::IsBinaryOp(op));
     right_id_ = (op == Token::AND || op == Token::OR)
-        ? GetNextId()
+        ? static_cast<int>(GetNextId())
         : AstNode::kNoNumber;
   }
 
@@ -1710,7 +1717,6 @@ class FunctionLiteral: public Expression {
   int num_parameters() { return num_parameters_; }
 
   bool AllowsLazyCompilation();
-  bool AllowOptimize();
 
   Handle<String> debug_name() const {
     if (name_->length() > 0) return name_;

deps/v8/src/builtins.cc

@@ -380,7 +380,7 @@ static inline MaybeObject* EnsureJSArrayWithWritableFastElements(
     Object* receiver) {
   if (!receiver->IsJSArray()) return NULL;
   JSArray* array = JSArray::cast(receiver);
-  HeapObject* elms = HeapObject::cast(array->elements());
+  HeapObject* elms = array->elements();
   if (elms->map() == Heap::fixed_array_map()) return elms;
   if (elms->map() == Heap::fixed_cow_array_map()) {
     return array->EnsureWritableFastElements();
@@ -613,41 +613,42 @@ BUILTIN(ArraySlice) {
   Object* receiver = *args.receiver();
   FixedArray* elms;
   int len = -1;
-  { MaybeObject* maybe_elms_obj =
-        EnsureJSArrayWithWritableFastElements(receiver);
-    Object* elms_obj;
-    if (maybe_elms_obj != NULL && maybe_elms_obj->ToObject(&elms_obj)) {
-      if (!IsJSArrayFastElementMovingAllowed(JSArray::cast(receiver))) {
-        return CallJsBuiltin("ArraySlice", args);
-      }
-      elms = FixedArray::cast(elms_obj);
-      JSArray* array = JSArray::cast(receiver);
-      ASSERT(array->HasFastElements());
+  if (receiver->IsJSArray()) {
+    JSArray* array = JSArray::cast(receiver);
+    if (!array->HasFastElements() ||
+        !IsJSArrayFastElementMovingAllowed(array)) {
+      return CallJsBuiltin("ArraySlice", args);
+    }
 
-      len = Smi::cast(array->length())->value();
-    } else {
-      // Array.slice(arguments, ...) is quite a common idiom (notably more
-      // than 50% of invocations in Web apps).  Treat it in C++ as well.
-      Map* arguments_map =
-          Top::context()->global_context()->arguments_boilerplate()->map();
-
-      bool is_arguments_object_with_fast_elements =
-          receiver->IsJSObject()
-          && JSObject::cast(receiver)->map() == arguments_map
-          && JSObject::cast(receiver)->HasFastElements();
-      if (!is_arguments_object_with_fast_elements) {
+    elms = FixedArray::cast(array->elements());
+    len = Smi::cast(array->length())->value();
+  } else {
+    // Array.slice(arguments, ...) is quite a common idiom (notably more
+    // than 50% of invocations in Web apps).  Treat it in C++ as well.
+    Map* arguments_map =
+        Top::context()->global_context()->arguments_boilerplate()->map();
+
+    bool is_arguments_object_with_fast_elements =
+        receiver->IsJSObject()
+        && JSObject::cast(receiver)->map() == arguments_map
+        && JSObject::cast(receiver)->HasFastElements();
+    if (!is_arguments_object_with_fast_elements) {
+      return CallJsBuiltin("ArraySlice", args);
+    }
+    elms = FixedArray::cast(JSObject::cast(receiver)->elements());
+    Object* len_obj = JSObject::cast(receiver)
+        ->InObjectPropertyAt(Heap::arguments_length_index);
+    if (!len_obj->IsSmi()) {
+      return CallJsBuiltin("ArraySlice", args);
+    }
+    len = Smi::cast(len_obj)->value();
+    if (len > elms->length()) {
+      return CallJsBuiltin("ArraySlice", args);
+    }
+    for (int i = 0; i < len; i++) {
+      if (elms->get(i) == Heap::the_hole_value()) {
         return CallJsBuiltin("ArraySlice", args);
       }
-      elms = FixedArray::cast(JSObject::cast(receiver)->elements());
-      len = elms->length();
-#ifdef DEBUG
-      // Arguments object by construction should have no holes, check it.
-      if (FLAG_enable_slow_asserts) {
-        for (int i = 0; i < len; i++) {
-          ASSERT(elms->get(i) != Heap::the_hole_value());
-        }
-      }
-#endif
     }
   }
   ASSERT(len >= 0);

deps/v8/src/code-stubs.cc

@@ -49,8 +49,10 @@ bool CodeStub::FindCodeInCache(Code** code_out) {
 void CodeStub::GenerateCode(MacroAssembler* masm) {
   // Update the static counter each time a new code stub is generated.
   Counters::code_stubs.Increment();
+
   // Nested stubs are not allowed for leafs.
-  masm->set_allow_stub_calls(AllowsStubCalls());
+  AllowStubCallsScope allow_scope(masm, AllowsStubCalls());
+
   // Generate the code for the stub.
   masm->set_generating_stub(true);
   Generate(masm);
@@ -197,4 +199,34 @@ void ICCompareStub::Generate(MacroAssembler* masm) {
 }
 
 
+const char* InstanceofStub::GetName() {
+  if (name_ != NULL) return name_;
+  const int kMaxNameLength = 100;
+  name_ = Bootstrapper::AllocateAutoDeletedArray(kMaxNameLength);
+  if (name_ == NULL) return "OOM";
+
+  const char* args = "";
+  if (HasArgsInRegisters()) {
+    args = "_REGS";
+  }
+
+  const char* inline_check = "";
+  if (HasCallSiteInlineCheck()) {
+    inline_check = "_INLINE";
+  }
+
+  const char* return_true_false_object = "";
+  if (ReturnTrueFalseObject()) {
+    return_true_false_object = "_TRUEFALSE";
+  }
+
+  OS::SNPrintF(Vector<char>(name_, kMaxNameLength),
+               "InstanceofStub%s%s%s",
+               args,
+               inline_check,
+               return_true_false_object);
+  return name_;
+}
+
+
 } }  // namespace v8::internal

deps/v8/src/code-stubs.h

@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -34,7 +34,7 @@ namespace v8 {
 namespace internal {
 
 // List of code stubs used on all platforms. The order in this list is important
-// as only the stubs up to and including RecordWrite allows nested stub calls.
+// as only the stubs up to and including Instanceof allows nested stub calls.
 #define CODE_STUB_LIST_ALL_PLATFORMS(V)  \
   V(CallFunction)                        \
   V(GenericBinaryOp)                     \
@@ -48,7 +48,7 @@ namespace internal {
   V(CompareIC)                           \
   V(MathPow)                             \
   V(TranscendentalCache)                 \
-  V(RecordWrite)                         \
+  V(Instanceof)                          \
   V(ConvertToDouble)                     \
   V(WriteInt32ToHeapNumber)              \
   V(IntegerMod)                          \
@@ -59,7 +59,6 @@ namespace internal {
   V(GenericUnaryOp)                      \
   V(RevertToNumber)                      \
   V(ToBoolean)                           \
-  V(Instanceof)                          \
   V(CounterOp)                           \
   V(ArgumentsAccess)                     \
   V(RegExpExec)                          \
@@ -180,7 +179,7 @@ class CodeStub BASE_EMBEDDED {
            MajorKeyBits::encode(MajorKey());
   }
 
-  bool AllowsStubCalls() { return MajorKey() <= RecordWrite; }
+  bool AllowsStubCalls() { return MajorKey() <= Instanceof; }
 
   class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {};
   class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {};
@@ -327,22 +326,38 @@ class InstanceofStub: public CodeStub {
  public:
   enum Flags {
     kNoFlags = 0,
-    kArgsInRegisters = 1 << 0
+    kArgsInRegisters = 1 << 0,
+    kCallSiteInlineCheck = 1 << 1,
+    kReturnTrueFalseObject = 1 << 2
   };
 
-  explicit InstanceofStub(Flags flags) : flags_(flags) { }
+  explicit InstanceofStub(Flags flags) : flags_(flags), name_(NULL) { }
+
+  static Register left();
+  static Register right();
 
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return Instanceof; }
-  int MinorKey() { return args_in_registers() ? 1 : 0; }
+  int MinorKey() { return static_cast<int>(flags_); }
 
-  bool args_in_registers() {
+  bool HasArgsInRegisters() const {
     return (flags_ & kArgsInRegisters) != 0;
   }
 
+  bool HasCallSiteInlineCheck() const {
+    return (flags_ & kCallSiteInlineCheck) != 0;
+  }
+
+  bool ReturnTrueFalseObject() const {
+    return (flags_ & kReturnTrueFalseObject) != 0;
+  }
+
+  const char* GetName();
+
   Flags flags_;
+  char* name_;
 };
 
 
@@ -707,6 +722,10 @@ class CallFunctionStub: public CodeStub {
 
   void Generate(MacroAssembler* masm);
 
+  static int ExtractArgcFromMinorKey(int minor_key) {
+    return ArgcBits::decode(minor_key);
+  }
+
  private:
   int argc_;
   InLoopFlag in_loop_;
@@ -738,11 +757,6 @@ class CallFunctionStub: public CodeStub {
   bool ReceiverMightBeValue() {
     return (flags_ & RECEIVER_MIGHT_BE_VALUE) != 0;
   }
-
- public:
-  static int ExtractArgcFromMinorKey(int minor_key) {
-    return ArgcBits::decode(minor_key);
-  }
 };
 
 
@@ -902,6 +916,24 @@ class StringCharAtGenerator {
   DISALLOW_COPY_AND_ASSIGN(StringCharAtGenerator);
 };
 
+
+class AllowStubCallsScope {
+ public:
+  AllowStubCallsScope(MacroAssembler* masm, bool allow)
+       : masm_(masm), previous_allow_(masm->allow_stub_calls()) {
+    masm_->set_allow_stub_calls(allow);
+  }
+  ~AllowStubCallsScope() {
+    masm_->set_allow_stub_calls(previous_allow_);
+  }
+
+ private:
+  MacroAssembler* masm_;
+  bool previous_allow_;
+
+  DISALLOW_COPY_AND_ASSIGN(AllowStubCallsScope);
+};
+
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_

deps/v8/src/compiler.cc

@@ -92,6 +92,25 @@ CompilationInfo::CompilationInfo(Handle<JSFunction> closure)
 }
 
 
+void CompilationInfo::DisableOptimization() {
+  if (FLAG_optimize_closures) {
+    // If we allow closures optimizations and it's an optimizable closure
+    // mark it correspondingly.
+    bool is_closure = closure_.is_null() && !scope_->HasTrivialOuterContext();
+    if (is_closure) {
+      bool is_optimizable_closure =
+          !scope_->outer_scope_calls_eval() && !scope_->inside_with();
+      if (is_optimizable_closure) {
+        SetMode(BASE);
+        return;
+      }
+    }
+  }
+
+  SetMode(NONOPT);
+}
+
+
 // Determine whether to use the full compiler for all code. If the flag
 // --always-full-compiler is specified this is the case. For the virtual frame
 // based compiler the full compiler is also used if a debugger is connected, as
@@ -262,7 +281,9 @@ static bool MakeCrankshaftCode(CompilationInfo* info) {
     HTracer::Instance()->TraceCompilation(info->function());
   }
 
-  TypeFeedbackOracle oracle(Handle<Code>(info->shared_info()->code()));
+  TypeFeedbackOracle oracle(
+      Handle<Code>(info->shared_info()->code()),
+      Handle<Context>(info->closure()->context()->global_context()));
   HGraphBuilder builder(&oracle);
   HPhase phase(HPhase::kTotal);
   HGraph* graph = builder.CreateGraph(info);

deps/v8/src/compiler.h

@@ -114,7 +114,7 @@ class CompilationInfo BASE_EMBEDDED {
     SetMode(OPTIMIZE);
     osr_ast_id_ = osr_ast_id;
   }
-  void DisableOptimization() { SetMode(NONOPT); }
+  void DisableOptimization();
 
   // Deoptimization support.
   bool HasDeoptimizationSupport() const { return supports_deoptimization_; }
@@ -125,9 +125,7 @@ class CompilationInfo BASE_EMBEDDED {
 
   // Determine whether or not we can adaptively optimize.
   bool AllowOptimize() {
-    return V8::UseCrankshaft() &&
-           !closure_.is_null() &&
-           function_->AllowOptimize();
+    return V8::UseCrankshaft() && !closure_.is_null();
   }
 
  private:

deps/v8/src/cpu-profiler.cc

@@ -47,7 +47,8 @@ static const int kTickSamplesBufferChunksCount = 16;
 
 
 ProfilerEventsProcessor::ProfilerEventsProcessor(ProfileGenerator* generator)
-    : generator_(generator),
+    : Thread("v8:ProfEvntProc"),
+      generator_(generator),
       running_(true),
       ticks_buffer_(sizeof(TickSampleEventRecord),
                     kTickSamplesBufferChunkSize,

deps/v8/src/d8-debug.cc

@@ -34,12 +34,21 @@
 
 namespace v8 {
 
-void PrintPrompt() {
-  printf("dbg> ");
+static bool was_running = true;
+
+void PrintPrompt(bool is_running) {
+  const char* prompt = is_running? "> " : "dbg> ";
+  was_running = is_running;
+  printf("%s", prompt);
   fflush(stdout);
 }
 
 
+void PrintPrompt() {
+  PrintPrompt(was_running);
+}
+
+
 void HandleDebugEvent(DebugEvent event,
                       Handle<Object> exec_state,
                       Handle<Object> event_data,
@@ -91,7 +100,7 @@ void HandleDebugEvent(DebugEvent event,
   bool running = false;
   while (!running) {
     char command[kBufferSize];
-    PrintPrompt();
+    PrintPrompt(running);
     char* str = fgets(command, kBufferSize, stdin);
     if (str == NULL) break;
 
@@ -284,7 +293,9 @@ void RemoteDebugger::HandleMessageReceived(char* message) {
   } else {
     printf("???\n");
   }
-  PrintPrompt();
+
+  bool is_running = details->Get(String::New("running"))->ToBoolean()->Value();
+  PrintPrompt(is_running);
 }
 
 

deps/v8/src/d8-debug.h

@@ -98,7 +98,8 @@ class RemoteDebugger {
 class ReceiverThread: public i::Thread {
  public:
   explicit ReceiverThread(RemoteDebugger* remote_debugger)
-      : remote_debugger_(remote_debugger) {}
+      : Thread("d8:ReceiverThrd"),
+        remote_debugger_(remote_debugger) {}
   ~ReceiverThread() {}
 
   void Run();
@@ -112,7 +113,8 @@ class ReceiverThread: public i::Thread {
 class KeyboardThread: public i::Thread {
  public:
   explicit KeyboardThread(RemoteDebugger* remote_debugger)
-      : remote_debugger_(remote_debugger) {}
+      : Thread("d8:KeyboardThrd"),
+        remote_debugger_(remote_debugger) {}
   ~KeyboardThread() {}
 
   void Run();

deps/v8/src/d8.cc

@@ -599,7 +599,8 @@ void Shell::RunShell() {
 class ShellThread : public i::Thread {
  public:
   ShellThread(int no, i::Vector<const char> files)
-    : no_(no), files_(files) { }
+    : Thread("d8:ShellThread"),
+      no_(no), files_(files) { }
   virtual void Run();
  private:
   int no_;

deps/v8/src/d8.js

@@ -110,17 +110,32 @@ Debug.ScopeType = { Global: 0,
 const kNoFrame = -1;
 Debug.State = {
   currentFrame: kNoFrame,
+  displaySourceStartLine: -1,
+  displaySourceEndLine: -1,
   currentSourceLine: -1
 }
 var trace_compile = false;  // Tracing all compile events?
+var trace_debug_json = false; // Tracing all debug json packets?
+var last_cmd_line = '';
+var repeat_cmd_line = '';
+var is_running = true;
+
+// Copied from debug-delay.js.  This is needed below:
+function ScriptTypeFlag(type) {
+  return (1 << type);
+}
 
 
 // Process a debugger JSON message into a display text and a running status.
 // This function returns an object with properties "text" and "running" holding
 // this information.
 function DebugMessageDetails(message) {
+  if (trace_debug_json) {
+    print("received: '" + message + "'");
+  }
   // Convert the JSON string to an object.
   var response = new ProtocolPackage(message);
+  is_running = response.running();
 
   if (response.type() == 'event') {
     return DebugEventDetails(response);
@@ -161,6 +176,8 @@ function DebugEventDetails(response) {
       result += '\n';
       result += SourceUnderline(body.sourceLineText, body.sourceColumn);
       Debug.State.currentSourceLine = body.sourceLine;
+      Debug.State.displaySourceStartLine = -1;
+      Debug.State.displaySourceEndLine = -1;
       Debug.State.currentFrame = 0;
       details.text = result;
       break;
@@ -180,10 +197,14 @@ function DebugEventDetails(response) {
         result += '\n';
         result += SourceUnderline(body.sourceLineText, body.sourceColumn);
         Debug.State.currentSourceLine = body.sourceLine;
+        Debug.State.displaySourceStartLine = -1;
+        Debug.State.displaySourceEndLine = -1;
         Debug.State.currentFrame = 0;
       } else {
         result += ' (empty stack)';
         Debug.State.currentSourceLine = -1;
+        Debug.State.displaySourceStartLine = -1;
+        Debug.State.displaySourceEndLine = -1;
         Debug.State.currentFrame = kNoFrame;
       }
       details.text = result;
@@ -202,6 +223,10 @@ function DebugEventDetails(response) {
       details.text = result;
       break;
 
+    case 'scriptCollected':
+      details.text = result;
+      break;
+
     default:
       details.text = 'Unknown debug event ' + response.event();
   }
@@ -254,7 +279,11 @@ function SourceUnderline(source_text, position) {
 
 // Converts a text command to a JSON request.
 function DebugCommandToJSONRequest(cmd_line) {
-  return new DebugRequest(cmd_line).JSONRequest();
+  var result = new DebugRequest(cmd_line).JSONRequest();
+  if (trace_debug_json && result) {
+    print("sending: '" + result + "'");
+  }
+  return result;
 };
 
 
@@ -266,6 +295,20 @@ function DebugRequest(cmd_line) {
     return;
   }
 
+  // Check for a simple carriage return to repeat the last command:
+  var is_repeating = false;
+  if (cmd_line == '\n') {
+    if (is_running) {
+      cmd_line = 'break'; // Not in debugger mode, break with a frame request.
+    } else {
+      cmd_line = repeat_cmd_line; // use command to repeat.
+      is_repeating = true;
+    }
+  }
+  if (!is_running) { // Only save the command if in debugger mode.
+    repeat_cmd_line = cmd_line;   // save last command.
+  }
+
   // Trim string for leading and trailing whitespace.
   cmd_line = cmd_line.replace(/^\s+|\s+$/g, '');
 
@@ -281,6 +324,13 @@ function DebugRequest(cmd_line) {
     args = cmd_line.slice(pos).replace(/^\s+|\s+$/g, '');
   }
 
+  if ((cmd === undefined) || !cmd) {
+    this.request_ = void 0;
+    return;
+  }
+
+  last_cmd = cmd;
+
   // Switch on command.
   switch (cmd) {
     case 'continue':
@@ -290,7 +340,22 @@ function DebugRequest(cmd_line) {
 
     case 'step':
     case 's':
-      this.request_ = this.stepCommandToJSONRequest_(args);
+      this.request_ = this.stepCommandToJSONRequest_(args, 'in');
+      break;
+
+    case 'stepi':
+    case 'si':
+      this.request_ = this.stepCommandToJSONRequest_(args, 'min');
+      break;
+
+    case 'next':
+    case 'n':
+      this.request_ = this.stepCommandToJSONRequest_(args, 'next');
+      break;
+
+    case 'finish':
+    case 'fin':
+      this.request_ = this.stepCommandToJSONRequest_(args, 'out');
       break;
 
     case 'backtrace':
@@ -311,6 +376,26 @@ function DebugRequest(cmd_line) {
       this.request_ = this.scopeCommandToJSONRequest_(args);
       break;
 
+    case 'disconnect':
+    case 'exit':
+    case 'quit':
+      this.request_ = this.disconnectCommandToJSONRequest_(args);
+      break;
+
+    case 'up':
+      this.request_ =
+          this.frameCommandToJSONRequest_('' +
+                                          (Debug.State.currentFrame + 1));
+      break;
+      
+    case 'down':
+    case 'do':
+      this.request_ =
+          this.frameCommandToJSONRequest_('' +
+                                          (Debug.State.currentFrame - 1));
+      break;
+      
+    case 'set':
     case 'print':
     case 'p':
       this.request_ = this.printCommandToJSONRequest_(args);
@@ -328,11 +413,17 @@ function DebugRequest(cmd_line) {
       this.request_ = this.instancesCommandToJSONRequest_(args);
       break;
 
+    case 'list':
+    case 'l':
+      this.request_ = this.listCommandToJSONRequest_(args);
+      break;
     case 'source':
       this.request_ = this.sourceCommandToJSONRequest_(args);
       break;
 
     case 'scripts':
+    case 'script':
+    case 'scr':
       this.request_ = this.scriptsCommandToJSONRequest_(args);
       break;
 
@@ -347,6 +438,8 @@ function DebugRequest(cmd_line) {
       break;
 
     case 'clear':
+    case 'delete':
+    case 'd':
       this.request_ = this.clearCommandToJSONRequest_(args);
       break;
 
@@ -354,7 +447,42 @@ function DebugRequest(cmd_line) {
       this.request_ = this.threadsCommandToJSONRequest_(args);
       break;
 
+    case 'cond':
+      this.request_ = this.changeBreakpointCommandToJSONRequest_(args, 'cond');
+      break;
+
+    case 'enable':
+    case 'en':
+      this.request_ =
+          this.changeBreakpointCommandToJSONRequest_(args, 'enable');
+      break;
+
+    case 'disable':
+    case 'dis':
+      this.request_ =
+          this.changeBreakpointCommandToJSONRequest_(args, 'disable');
+      break;
+
+    case 'ignore':
+      this.request_ =
+          this.changeBreakpointCommandToJSONRequest_(args, 'ignore');
+      break;
+
+    case 'info':
+    case 'inf':
+      this.request_ = this.infoCommandToJSONRequest_(args);
+      break;
+
+    case 'flags':
+      this.request_ = this.v8FlagsToJSONRequest_(args);
+      break;
+
+    case 'gc':
+      this.request_ = this.gcToJSONRequest_(args);
+      break;
+
     case 'trace':
+    case 'tr':
       // Return undefined to indicate command handled internally (no JSON).
       this.request_ = void 0;
       this.traceCommand_(args);
@@ -370,8 +498,6 @@ function DebugRequest(cmd_line) {
     default:
       throw new Error('Unknown command "' + cmd + '"');
   }
-
-  last_cmd = cmd;
 }
 
 DebugRequest.prototype.JSONRequest = function() {
@@ -465,59 +591,73 @@ DebugRequest.prototype.continueCommandToJSONRequest_ = function(args) {
 
 
 // Create a JSON request for the step command.
-DebugRequest.prototype.stepCommandToJSONRequest_ = function(args) {
+DebugRequest.prototype.stepCommandToJSONRequest_ = function(args, type) {
   // Requesting a step is through the continue command with additional
   // arguments.
   var request = this.createRequest('continue');
   request.arguments = {};
 
   // Process arguments if any.
+
+  // Only process args if the command is 'step' which is indicated by type being
+  // set to 'in'.  For all other commands, ignore the args.
   if (args && args.length > 0) {
-    args = args.split(/\s*[ ]+\s*/g);
+    args = args.split(/\s+/g);
 
     if (args.length > 2) {
       throw new Error('Invalid step arguments.');
     }
 
     if (args.length > 0) {
-      // Get step count argument if any.
-      if (args.length == 2) {
-        var stepcount = parseInt(args[1]);
-        if (isNaN(stepcount) || stepcount <= 0) {
-          throw new Error('Invalid step count argument "' + args[0] + '".');
+      // Check if we have a gdb stype step command.  If so, the 1st arg would
+      // be the step count.  If it's not a number, then assume that we're
+      // parsing for the legacy v8 step command.
+      var stepcount = Number(args[0]);
+      if (stepcount == Number.NaN) {
+        // No step count at arg 1.  Process as legacy d8 step command:
+        if (args.length == 2) {
+          var stepcount = parseInt(args[1]);
+          if (isNaN(stepcount) || stepcount <= 0) {
+            throw new Error('Invalid step count argument "' + args[0] + '".');
+          }
+          request.arguments.stepcount = stepcount;
         }
-        request.arguments.stepcount = stepcount;
-      }
 
-      // Get the step action.
-      switch (args[0]) {
-        case 'in':
-        case 'i':
-          request.arguments.stepaction = 'in';
-          break;
+        // Get the step action.
+        switch (args[0]) {
+          case 'in':
+          case 'i':
+            request.arguments.stepaction = 'in';
+            break;
 
-        case 'min':
-        case 'm':
-          request.arguments.stepaction = 'min';
-          break;
+          case 'min':
+          case 'm':
+            request.arguments.stepaction = 'min';
+            break;
 
-        case 'next':
-        case 'n':
-          request.arguments.stepaction = 'next';
-          break;
+          case 'next':
+          case 'n':
+            request.arguments.stepaction = 'next';
+            break;
 
-        case 'out':
-        case 'o':
-          request.arguments.stepaction = 'out';
-          break;
+          case 'out':
+          case 'o':
+            request.arguments.stepaction = 'out';
+            break;
 
-        default:
-          throw new Error('Invalid step argument "' + args[0] + '".');
+          default:
+            throw new Error('Invalid step argument "' + args[0] + '".');
+        }
+
+      } else {
+        // gdb style step commands:
+        request.arguments.stepaction = type;
+        request.arguments.stepcount = stepcount;
       }
     }
   } else {
-    // Default is step next.
-    request.arguments.stepaction = 'next';
+    // Default is step of the specified type.
+    request.arguments.stepaction = type;
   }
 
   return request.toJSONProtocol();
@@ -648,6 +788,41 @@ DebugRequest.prototype.instancesCommandToJSONRequest_ = function(args) {
 };
 
 
+// Create a JSON request for the list command.
+DebugRequest.prototype.listCommandToJSONRequest_ = function(args) {
+
+  // Default is ten lines starting five lines before the current location.
+  if (Debug.State.displaySourceEndLine == -1) {
+    // If we list forwards, we will start listing after the last source end
+    // line.  Set it to start from 5 lines before the current location.
+    Debug.State.displaySourceEndLine = Debug.State.currentSourceLine - 5;
+    // If we list backwards, we will start listing backwards from the last
+    // source start line.  Set it to start from 1 lines before the current
+    // location.
+    Debug.State.displaySourceStartLine = Debug.State.currentSourceLine + 1;
+  }
+
+  var from = Debug.State.displaySourceEndLine + 1;
+  var lines = 10;
+
+  // Parse the arguments.
+  args = args.split(/\s*,\s*/g);
+  if (args == '') {
+  } else if ((args.length == 1) && (args[0] == '-')) {
+    from = Debug.State.displaySourceStartLine - lines;
+  } else if (args.length == 2) {
+    from = parseInt(args[0]);
+    lines = parseInt(args[1]) - from + 1; // inclusive of the ending line.
+  } else {
+    throw new Error('Invalid list arguments.');
+  }
+  Debug.State.displaySourceStartLine = from;
+  Debug.State.displaySourceEndLine = from + lines - 1;
+  var sourceArgs = '' + from + ' ' + lines;
+  return this.sourceCommandToJSONRequest_(sourceArgs);
+};
+
+
 // Create a JSON request for the source command.
 DebugRequest.prototype.sourceCommandToJSONRequest_ = function(args) {
   // Build a evaluate request from the text command.
@@ -709,7 +884,10 @@ DebugRequest.prototype.scriptsCommandToJSONRequest_ = function(args) {
         break;
 
       default:
-        throw new Error('Invalid argument "' + args[0] + '".');
+        // If the arg is not one of the know one aboves, then it must be a
+        // filter used for filtering the results:
+        request.arguments.filter = args[0];
+        break;
     }
   }
 
@@ -731,6 +909,8 @@ DebugRequest.prototype.breakCommandToJSONRequest_ = function(args) {
 
     var request = this.createRequest('setbreakpoint');
 
+    // Break the args into target spec and condition if appropriate.
+
     // Check for breakpoint condition.
     pos = args.indexOf(' ');
     if (pos > 0) {
@@ -801,6 +981,178 @@ DebugRequest.prototype.clearCommandToJSONRequest_ = function(args) {
 };
 
 
+// Create a JSON request for the change breakpoint command.
+DebugRequest.prototype.changeBreakpointCommandToJSONRequest_ =
+    function(args, command) {
+
+  var request;
+
+  // Check for exception breaks first:
+  //   en[able] exc[eptions] [all|unc[aught]]
+  //   en[able] [all|unc[aught]] exc[eptions]
+  //   dis[able] exc[eptions] [all|unc[aught]]
+  //   dis[able] [all|unc[aught]] exc[eptions]
+  if ((command == 'enable' || command == 'disable') &&
+      args && args.length > 1) {
+    var nextPos = args.indexOf(' ');
+    var arg1 = (nextPos > 0) ? args.substring(0, nextPos) : args;
+    var excType = null;
+
+    // Check for:
+    //   en[able] exc[eptions] [all|unc[aught]]
+    //   dis[able] exc[eptions] [all|unc[aught]]
+    if (arg1 == 'exc' || arg1 == 'exception' || arg1 == 'exceptions') {
+
+      var arg2 = (nextPos > 0) ?
+          args.substring(nextPos + 1, args.length) : 'all';
+      if (!arg2) {
+        arg2 = 'all'; // if unspecified, set for all.
+      } if (arg2 == 'unc') { // check for short cut.
+        arg2 = 'uncaught';
+      }
+      excType = arg2;
+      
+    // Check for:
+    //   en[able] [all|unc[aught]] exc[eptions]
+    //   dis[able] [all|unc[aught]] exc[eptions]
+    } else if (arg1 == 'all' || arg1 == 'unc' || arg1 == 'uncaught') {
+
+      var arg2 = (nextPos > 0) ?
+          args.substring(nextPos + 1, args.length) : null;
+      if (arg2 == 'exc' || arg1 == 'exception' || arg1 == 'exceptions') {
+        excType = arg1;
+        if (excType == 'unc') {
+          excType = 'uncaught';
+        }
+      }
+    }
+
+    // If we matched one of the command formats, then excType will be non-null:
+    if (excType) {
+      // Build a evaluate request from the text command.
+      request = this.createRequest('setexceptionbreak');
+
+      request.arguments = {};
+      request.arguments.type = excType;
+      request.arguments.enabled = (command == 'enable');
+
+      return request.toJSONProtocol();
+    }
+  }
+
+  // Build a evaluate request from the text command.
+  request = this.createRequest('changebreakpoint');
+
+  // Process arguments if any.
+  if (args && args.length > 0) {
+    request.arguments = {};
+    var pos = args.indexOf(' ');
+    var breakpointArg = args;
+    var otherArgs;
+    if (pos > 0) {
+      breakpointArg = args.substring(0, pos);
+      otherArgs = args.substring(pos + 1, args.length);
+    }
+
+    request.arguments.breakpoint = parseInt(breakpointArg);
+
+    switch(command) {
+      case 'cond':
+        request.arguments.condition = otherArgs ? otherArgs : null;
+        break;
+      case 'enable':
+        request.arguments.enabled = true;
+        break;
+      case 'disable':
+        request.arguments.enabled = false;
+        break;
+      case 'ignore':
+        request.arguments.ignoreCount = parseInt(otherArgs);
+        break;
+      default:
+        throw new Error('Invalid arguments.');  
+    }
+  } else {
+    throw new Error('Invalid arguments.');
+  }
+
+  return request.toJSONProtocol();
+};
+
+
+// Create a JSON request for the disconnect command.
+DebugRequest.prototype.disconnectCommandToJSONRequest_ = function(args) {
+  var request;
+  request = this.createRequest('disconnect');
+  return request.toJSONProtocol();
+};
+
+
+// Create a JSON request for the info command.
+DebugRequest.prototype.infoCommandToJSONRequest_ = function(args) {
+  var request;
+  if (args && (args == 'break' || args == 'br')) {
+    // Build a evaluate request from the text command.
+    request = this.createRequest('listbreakpoints');
+    last_cmd = 'info break';
+  } else if (args && (args == 'locals' || args == 'lo')) {
+    // Build a evaluate request from the text command.
+    request = this.createRequest('frame');
+    last_cmd = 'info locals';
+  } else if (args && (args == 'args' || args == 'ar')) {
+    // Build a evaluate request from the text command.
+    request = this.createRequest('frame');
+    last_cmd = 'info args';
+  } else {
+    throw new Error('Invalid info arguments.');
+  }
+
+  return request.toJSONProtocol();
+};
+
+
+DebugRequest.prototype.v8FlagsToJSONRequest_ = function(args) {
+  var request;
+  request = this.createRequest('v8flags');
+  request.arguments = {};
+  request.arguments.flags = args;
+  return request.toJSONProtocol();
+};
+
+
+DebugRequest.prototype.gcToJSONRequest_ = function(args) {
+  var request;
+  if (!args) {
+    args = 'all';
+  }
+  var args = args.split(/\s+/g);
+  var cmd = args[0];
+
+  switch(cmd) {
+    case 'all':
+    case 'quick':
+    case 'full':
+    case 'young':
+    case 'old':
+    case 'compact':
+    case 'sweep':
+    case 'scavenge': {
+      if (cmd == 'young') { cmd = 'quick'; }
+      else if (cmd == 'old') { cmd = 'full'; }
+
+      request = this.createRequest('gc');
+      request.arguments = {};
+      request.arguments.type = cmd;
+      break;
+    }
+      // Else fall thru to the default case below to report the error.
+    default:
+      throw new Error('Missing arguments after ' + cmd + '.');
+  }
+  return request.toJSONProtocol();
+};
+
+
 // Create a JSON request for the threads command.
 DebugRequest.prototype.threadsCommandToJSONRequest_ = function(args) {
   // Build a threads request from the text command.
@@ -816,6 +1168,10 @@ DebugRequest.prototype.traceCommand_ = function(args) {
     if (args == 'compile') {
       trace_compile = !trace_compile;
       print('Tracing of compiled scripts ' + (trace_compile ? 'on' : 'off'));
+    } else if (args === 'debug json' || args === 'json' || args === 'packets') {
+      trace_debug_json = !trace_debug_json;
+      print('Tracing of debug json packets ' +
+            (trace_debug_json ? 'on' : 'off'));
     } else {
       throw new Error('Invalid trace arguments.');
     }
@@ -831,24 +1187,63 @@ DebugRequest.prototype.helpCommand_ = function(args) {
     print('warning: arguments to \'help\' are ignored');
   }
 
-  print('break');
-  print('break location [condition]');
-  print('  break on named function: location is a function name');
-  print('  break on function: location is #<id>#');
-  print('  break on script position: location is name:line[:column]');
-  print('clear <breakpoint #>');
-  print('backtrace [n] | [-n] | [from to]');
-  print('frame <frame #>');
+  print('Note: <> denotes symbollic values to be replaced with real values.');
+  print('Note: [] denotes optional parts of commands, or optional options / arguments.');
+  print('      e.g. d[elete] - you get the same command if you type d or delete.');
+  print('');
+  print('[break] - break as soon as possible');
+  print('b[reak] location [condition]');
+  print('        - break on named function: location is a function name');
+  print('        - break on function: location is #<id>#');
+  print('        - break on script position: location is name:line[:column]');
+  print('');
+  print('clear <breakpoint #>       - deletes the specified user defined breakpoint');
+  print('d[elete]  <breakpoint #>   - deletes the specified user defined breakpoint');
+  print('dis[able] <breakpoint #>   - disables the specified user defined breakpoint');
+  print('dis[able] exc[eptions] [[all] | unc[aught]]');
+  print('                           - disables breaking on exceptions');
+  print('en[able]  <breakpoint #>   - enables the specified user defined breakpoint');
+  print('en[able]  exc[eptions] [[all] | unc[aught]]');
+  print('                           - enables breaking on exceptions');
+  print('');
+  print('b[ack]t[race] [n] | [-n] | [from to]');
+  print('                           - prints the stack back trace');
+  print('f[rame]                    - prints info about the current frame context');
+  print('f[rame] <frame #>          - set context to specified frame #');
   print('scopes');
   print('scope <scope #>');
+  print('');
+  print('up                         - set context to caller of current frame');
+  print('do[wn]                     - set context to callee of current frame');
+  print('inf[o] br[eak]             - prints info about breakpoints in use');
+  print('inf[o] ar[gs]              - prints info about arguments of the current function');
+  print('inf[o] lo[cals]            - prints info about locals in the current function');
+  print('inf[o] liveobjectlist|lol  - same as \'lol info\'');
+  print('');
   print('step [in | next | out| min [step count]]');
-  print('print <expression>');
-  print('dir <expression>');
+  print('c[ontinue]                 - continue executing after a breakpoint');
+  print('s[tep]   [<N>]             - step into the next N callees (default N is 1)');
+  print('s[tep]i  [<N>]             - step into the next N callees (default N is 1)');
+  print('n[ext]   [<N>]             - step over the next N callees (default N is 1)');
+  print('fin[ish] [<N>]             - step out of N frames (default N is 1)');
+  print('');
+  print('p[rint] <expression>       - prints the result of the specified expression');
+  print('dir <expression>           - prints the object structure of the result');
+  print('set <var> = <expression>   - executes the specified statement');
+  print('');
+  print('l[ist]                     - list the source code around for the current pc');
+  print('l[ist] [- | <start>,<end>] - list the specified range of source code');
   print('source [from line [num lines]]');
-  print('scripts');
-  print('continue');
+  print('scr[ipts] [native|extensions|all]');
+  print('scr[ipts] [<filter text>]  - list scripts with the specified text in its description');
+  print('');
+  print('gc                         - runs the garbage collector');
+  print('');
   print('trace compile');
-  print('help');
+  // hidden command: trace debug json - toggles tracing of debug json packets
+  print('');
+  print('disconnect|exit|quit       - disconnects and quits the debugger');
+  print('help                       - prints this help information');
 }
 
 
@@ -930,6 +1325,27 @@ function formatScope_(scope) {
 }
 
 
+function refObjectToString_(protocolPackage, handle) {
+  var value = protocolPackage.lookup(handle);
+  var result = '';
+  if (value.isString()) {
+    result = '"' + value.value() + '"';
+  } else if (value.isPrimitive()) {
+    result = value.valueString();
+  } else if (value.isObject()) {
+    result += formatObject_(value, true);
+  }
+  return result;
+}
+
+
+// Rounds number 'num' to 'length' decimal places.
+function roundNumber(num, length) {
+  var factor = Math.pow(10, length);
+  return Math.round(num * factor) / factor;
+}
+
+
 // Convert a JSON response to text for display in a text based debugger.
 function DebugResponseDetails(response) {
   details = {text:'', running:false}
@@ -962,6 +1378,11 @@ function DebugResponseDetails(response) {
         details.text = result;
         break;
 
+      case 'changebreakpoint':
+        result = 'successfully changed breakpoint';
+        details.text = result;
+        break;
+
       case 'listbreakpoints':
         result = 'breakpoints: (' + body.breakpoints.length + ')';
         for (var i = 0; i < body.breakpoints.length; i++) {
@@ -974,9 +1395,9 @@ function DebugResponseDetails(response) {
           if (breakpoint.script_name) {
               result += ' script_name=' + breakpoint.script_name;
           }
-          result += ' line=' + breakpoint.line;
+          result += ' line=' + (breakpoint.line + 1);
           if (breakpoint.column != null) {
-            result += ' column=' + breakpoint.column;
+            result += ' column=' + (breakpoint.column + 1);
           }
           if (breakpoint.groupId) {
             result += ' groupId=' + breakpoint.groupId;
@@ -992,6 +1413,24 @@ function DebugResponseDetails(response) {
           }
           result += ' hit_count=' + breakpoint.hit_count;
         }
+        if (body.breakpoints.length === 0) {
+          result = "No user defined breakpoints\n";
+        } else {
+          result += '\n';
+        }
+        if (body.breakOnExceptions) {
+          result += '* breaking on ALL exceptions is enabled\n';
+        } else if (body.breakOnUncaughtExceptions) {
+          result += '* breaking on UNCAUGHT exceptions is enabled\n';
+        } else {
+          result += '* all exception breakpoints are disabled\n';            
+        }
+        details.text = result;
+        break;
+
+      case 'setexceptionbreak':
+        result = 'Break on ' + body.type + ' exceptions: ';
+        result += body.enabled ? 'enabled' : 'disabled';
         details.text = result;
         break;
 
@@ -1010,10 +1449,39 @@ function DebugResponseDetails(response) {
         break;
 
       case 'frame':
-        details.text = SourceUnderline(body.sourceLineText,
-                                       body.column);
-        Debug.State.currentSourceLine = body.line;
-        Debug.State.currentFrame = body.index;
+        if (last_cmd === 'info locals') {
+          var locals = body.locals;
+          if (locals.length === 0) {
+            result = 'No locals';
+          } else {
+            for (var i = 0; i < locals.length; i++) {
+              var local = locals[i];
+              result += local.name + ' = ';
+              result += refObjectToString_(response, local.value.ref);
+              result += '\n';
+            }
+          }
+        } else if (last_cmd === 'info args') {
+          var args = body.arguments;
+          if (args.length === 0) {
+            result = 'No arguments';
+          } else {
+            for (var i = 0; i < args.length; i++) {
+              var arg = args[i];
+              result += arg.name + ' = ';
+              result += refObjectToString_(response, arg.value.ref);
+              result += '\n';
+            }
+          }
+        } else {
+          result = SourceUnderline(body.sourceLineText,
+                                   body.column);
+          Debug.State.currentSourceLine = body.line;
+          Debug.State.currentFrame = body.index;
+          Debug.State.displaySourceStartLine = -1;
+          Debug.State.displaySourceEndLine = -1;
+        }
+        details.text = result;
         break;
 
       case 'scopes':
@@ -1132,7 +1600,9 @@ function DebugResponseDetails(response) {
           if (body[i].name) {
             result += body[i].name;
           } else {
-            if (body[i].compilationType == Debug.ScriptCompilationType.Eval) {
+            if (body[i].compilationType == Debug.ScriptCompilationType.Eval
+                && body[i].evalFromScript
+                ) {
               result += 'eval from ';
               var script_value = response.lookup(body[i].evalFromScript.ref);
               result += ' ' + script_value.field('name');
@@ -1162,6 +1632,9 @@ function DebugResponseDetails(response) {
           result += sourceStart;
           result += ']';
         }
+        if (body.length == 0) {
+          result = "no matching scripts found";
+        }
         details.text = result;
         break;
 
@@ -1181,6 +1654,23 @@ function DebugResponseDetails(response) {
         details.text = "(running)";
         break;
 
+      case 'v8flags':
+        details.text = "flags set";
+        break;
+
+      case 'gc':
+        details.text = "GC " + body.before + " => " + body.after;
+        if (body.after > (1024*1024)) {
+          details.text +=
+              " (" + roundNumber(body.before/(1024*1024), 1) + "M => " +
+                     roundNumber(body.after/(1024*1024), 1) + "M)";
+        } else if (body.after > 1024) {
+          details.text +=
+              " (" + roundNumber(body.before/1024, 1) + "K => " +
+                     roundNumber(body.after/1024, 1) + "K)";
+        }
+        break;
+
       default:
         details.text =
             'Response for unknown command \'' + response.command() + '\'' +
@@ -1467,6 +1957,11 @@ ProtocolValue.prototype.value = function() {
 }
 
 
+ProtocolValue.prototype.valueString = function() {
+  return this.value_.text;
+}
+
+
 function ProtocolReference(handle) {
   this.handle_ = handle;
 }
@@ -1613,7 +2108,9 @@ function SimpleObjectToJSON_(object) {
       var property_value_json;
       switch (typeof property_value) {
         case 'object':
-          if (typeof property_value.toJSONProtocol == 'function') {
+          if (property_value === null) {
+            property_value_json = 'null';
+          } else if (typeof property_value.toJSONProtocol == 'function') {
             property_value_json = property_value.toJSONProtocol(true)
           } else if (property_value.constructor.name == 'Array'){
             property_value_json = SimpleArrayToJSON_(property_value);

deps/v8/src/data-flow.h

@@ -112,10 +112,13 @@ class BitVector: public ZoneObject {
   }
 
   void CopyFrom(const BitVector& other) {
-    ASSERT(other.length() == length());
-    for (int i = 0; i < data_length_; i++) {
+    ASSERT(other.length() <= length());
+    for (int i = 0; i < other.data_length_; i++) {
       data_[i] = other.data_[i];
     }
+    for (int i = other.data_length_; i < data_length_; i++) {
+      data_[i] = 0;
+    }
   }
 
   bool Contains(int i) const {

deps/v8/src/date.js

@@ -1000,7 +1000,7 @@ function DateToISOString() {
 function DateToJSON(key) {
   var o = ToObject(this);
   var tv = DefaultNumber(o);
-  if (IS_NUMBER(tv) && !$isFinite(tv)) { 
+  if (IS_NUMBER(tv) && !NUMBER_IS_FINITE(tv)) { 
     return null; 
   }
   return o.toISOString();

deps/v8/src/debug-agent.cc

@@ -27,9 +27,11 @@
 
 
 #include "v8.h"
+#include "debug.h"
 #include "debug-agent.h"
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
+
 namespace v8 {
 namespace internal {
 
@@ -167,22 +169,33 @@ void DebuggerAgentSession::Run() {
   while (true) {
     // Read data from the debugger front end.
     SmartPointer<char> message = DebuggerAgentUtil::ReceiveMessage(client_);
-    if (*message == NULL) {
-      // Session is closed.
-      agent_->OnSessionClosed(this);
-      return;
+
+    const char* msg = *message;
+    bool is_closing_session = (msg == NULL);
+
+    if (msg == NULL) {
+      // If we lost the connection, then simulate a disconnect msg:
+      msg = "{\"seq\":1,\"type\":\"request\",\"command\":\"disconnect\"}";
+
+    } else {
+      // Check if we're getting a disconnect request:
+      const char* disconnectRequestStr =
+          "\"type\":\"request\",\"command\":\"disconnect\"}";
+      const char* result = strstr(msg, disconnectRequestStr);
+      if (result != NULL) {
+        is_closing_session = true;
+      }
     }
 
     // Convert UTF-8 to UTF-16.
-    unibrow::Utf8InputBuffer<> buf(*message,
-                                   StrLength(*message));
+    unibrow::Utf8InputBuffer<> buf(msg, StrLength(msg));
     int len = 0;
     while (buf.has_more()) {
       buf.GetNext();
       len++;
     }
     ScopedVector<int16_t> temp(len + 1);
-    buf.Reset(*message, StrLength(*message));
+    buf.Reset(msg, StrLength(msg));
     for (int i = 0; i < len; i++) {
       temp[i] = buf.GetNext();
     }
@@ -190,6 +203,12 @@ void DebuggerAgentSession::Run() {
     // Send the request received to the debugger.
     v8::Debug::SendCommand(reinterpret_cast<const uint16_t *>(temp.start()),
                            len);
+
+    if (is_closing_session) {
+      // Session is closed.
+      agent_->OnSessionClosed(this);
+      return;
+    }
   }
 }
 

deps/v8/src/debug-agent.h

@@ -44,7 +44,8 @@ class DebuggerAgentSession;
 class DebuggerAgent: public Thread {
  public:
   explicit DebuggerAgent(const char* name, int port)
-      : name_(StrDup(name)), port_(port),
+      : Thread(name),
+        name_(StrDup(name)), port_(port),
         server_(OS::CreateSocket()), terminate_(false),
         session_access_(OS::CreateMutex()), session_(NULL),
         terminate_now_(OS::CreateSemaphore(0)),
@@ -90,7 +91,8 @@ class DebuggerAgent: public Thread {
 class DebuggerAgentSession: public Thread {
  public:
   DebuggerAgentSession(DebuggerAgent* agent, Socket* client)
-      : agent_(agent), client_(client) {}
+      : Thread("v8:DbgAgntSessn"),
+        agent_(agent), client_(client) {}
 
   void DebuggerMessage(Vector<uint16_t> message);
   void Shutdown();

deps/v8/src/debug-debugger.js

@@ -112,8 +112,8 @@ var debugger_flags = {
 
 
 // Create a new break point object and add it to the list of break points.
-function MakeBreakPoint(source_position, opt_line, opt_column, opt_script_break_point) {
-  var break_point = new BreakPoint(source_position, opt_line, opt_column, opt_script_break_point);
+function MakeBreakPoint(source_position, opt_script_break_point) {
+  var break_point = new BreakPoint(source_position, opt_script_break_point);
   break_points.push(break_point);
   return break_point;
 }
@@ -123,10 +123,8 @@ function MakeBreakPoint(source_position, opt_line, opt_column, opt_script_break_
 // NOTE: This object does not have a reference to the function having break
 // point as this would cause function not to be garbage collected when it is
 // not used any more. We do not want break points to keep functions alive.
-function BreakPoint(source_position, opt_line, opt_column, opt_script_break_point) {
+function BreakPoint(source_position, opt_script_break_point) {
   this.source_position_ = source_position;
-  this.source_line_ = opt_line;
-  this.source_column_ = opt_column;
   if (opt_script_break_point) {
     this.script_break_point_ = opt_script_break_point;
   } else {
@@ -424,7 +422,7 @@ ScriptBreakPoint.prototype.set = function (script) {
   if (position === null) return;
 
   // Create a break point object and set the break point.
-  break_point = MakeBreakPoint(position, this.line(), this.column(), this);
+  break_point = MakeBreakPoint(position, this);
   break_point.setIgnoreCount(this.ignoreCount());
   var actual_position = %SetScriptBreakPoint(script, position, break_point);
   if (IS_UNDEFINED(actual_position)) {
@@ -639,7 +637,7 @@ Debug.setBreakPoint = function(func, opt_line, opt_column, opt_condition) {
                                         opt_condition);
   } else {
     // Set a break point directly on the function.
-    var break_point = MakeBreakPoint(source_position, opt_line, opt_column);
+    var break_point = MakeBreakPoint(source_position);
     var actual_position =
         %SetFunctionBreakPoint(func, source_position, break_point);
     actual_position += this.sourcePosition(func);
@@ -652,15 +650,40 @@ Debug.setBreakPoint = function(func, opt_line, opt_column, opt_condition) {
 };
 
 
+Debug.setBreakPointByScriptIdAndPosition = function(script_id, position,
+                                                    condition, enabled)
+{
+  break_point = MakeBreakPoint(position);
+  break_point.setCondition(condition);
+  if (!enabled)
+    break_point.disable();
+  var scripts = this.scripts();
+  for (var i = 0; i < scripts.length; i++) {
+    if (script_id == scripts[i].id) {
+      break_point.actual_position = %SetScriptBreakPoint(scripts[i], position,
+                                                         break_point);
+      break;
+    }
+  }
+  return break_point;
+};
+
+
 Debug.enableBreakPoint = function(break_point_number) {
   var break_point = this.findBreakPoint(break_point_number, false);
-  break_point.enable();
+  // Only enable if the breakpoint hasn't been deleted:
+  if (break_point) {
+    break_point.enable();
+  }
 };
 
 
 Debug.disableBreakPoint = function(break_point_number) {
   var break_point = this.findBreakPoint(break_point_number, false);
-  break_point.disable();
+  // Only enable if the breakpoint hasn't been deleted:
+  if (break_point) {
+    break_point.disable();
+  }
 };
 
 
@@ -701,6 +724,17 @@ Debug.clearAllBreakPoints = function() {
 };
 
 
+Debug.disableAllBreakPoints = function() {
+  // Disable all user defined breakpoints:
+  for (var i = 1; i < next_break_point_number; i++) {
+    Debug.disableBreakPoint(i);
+  }
+  // Disable all exception breakpoints:
+  %ChangeBreakOnException(Debug.ExceptionBreak.Caught, false);
+  %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, false);
+};
+
+
 Debug.findScriptBreakPoint = function(break_point_number, remove) {
   var script_break_point;
   for (var i = 0; i < script_break_points.length; i++) {
@@ -1341,6 +1375,10 @@ DebugCommandProcessor.prototype.processDebugJSONRequest = function(json_request)
         this.clearBreakPointRequest_(request, response);
       } else if (request.command == 'clearbreakpointgroup') {
         this.clearBreakPointGroupRequest_(request, response);
+      } else if (request.command == 'disconnect') {
+        this.disconnectRequest_(request, response);
+      } else if (request.command == 'setexceptionbreak') {
+        this.setExceptionBreakRequest_(request, response);
       } else if (request.command == 'listbreakpoints') {
         this.listBreakpointsRequest_(request, response);
       } else if (request.command == 'backtrace') {
@@ -1373,6 +1411,13 @@ DebugCommandProcessor.prototype.processDebugJSONRequest = function(json_request)
         this.changeLiveRequest_(request, response);
       } else if (request.command == 'flags') {
         this.debuggerFlagsRequest_(request, response);
+      } else if (request.command == 'v8flags') {
+        this.v8FlagsRequest_(request, response);
+
+      // GC tools:
+      } else if (request.command == 'gc') {
+        this.gcRequest_(request, response);
+
       } else {
         throw new Error('Unknown command "' + request.command + '" in request');
       }
@@ -1690,7 +1735,63 @@ DebugCommandProcessor.prototype.listBreakpointsRequest_ = function(request, resp
     array.push(description);
   }
 
-  response.body = { breakpoints: array }
+  response.body = {
+    breakpoints: array,
+    breakOnExceptions: Debug.isBreakOnException(),
+    breakOnUncaughtExceptions: Debug.isBreakOnUncaughtException()
+  }
+}
+
+
+DebugCommandProcessor.prototype.disconnectRequest_ =
+    function(request, response) {
+  Debug.disableAllBreakPoints();
+  this.continueRequest_(request, response);
+}
+
+
+DebugCommandProcessor.prototype.setExceptionBreakRequest_ =
+    function(request, response) {
+  // Check for legal request.
+  if (!request.arguments) {
+    response.failed('Missing arguments');
+    return;
+  }
+
+  // Pull out and check the 'type' argument:
+  var type = request.arguments.type;
+  if (!type) {
+    response.failed('Missing argument "type"');
+    return;
+  }
+
+  // Initialize the default value of enable:
+  var enabled;
+  if (type == 'all') {
+    enabled = !Debug.isBreakOnException();
+  } else if (type == 'uncaught') {
+    enabled = !Debug.isBreakOnUncaughtException();
+  }  
+
+  // Pull out and check the 'enabled' argument if present:
+  if (!IS_UNDEFINED(request.arguments.enabled)) {
+    enabled = request.arguments.enabled;
+    if ((enabled != true) && (enabled != false)) {
+      response.failed('Illegal value for "enabled":"' + enabled + '"');
+    }
+  }
+
+  // Now set the exception break state:
+  if (type == 'all') {
+    %ChangeBreakOnException(Debug.ExceptionBreak.Caught, enabled);
+  } else if (type == 'uncaught') {
+    %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, enabled);
+  } else {
+    response.failed('Unknown "type":"' + type + '"');
+  }
+
+  // Add the cleared break point number to the response.
+  response.body = { 'type': type, 'enabled': enabled };
 }
 
 
@@ -2047,6 +2148,16 @@ DebugCommandProcessor.prototype.scriptsRequest_ = function(request, response) {
         idsToInclude[ids[i]] = true;
       }
     }
+
+    var filterStr = null;
+    var filterNum = null;
+    if (!IS_UNDEFINED(request.arguments.filter)) {
+      var num = %ToNumber(request.arguments.filter);
+      if (!isNaN(num)) {
+        filterNum = num;
+      }
+      filterStr = request.arguments.filter;
+    }
   }
 
   // Collect all scripts in the heap.
@@ -2058,6 +2169,21 @@ DebugCommandProcessor.prototype.scriptsRequest_ = function(request, response) {
     if (idsToInclude && !idsToInclude[scripts[i].id]) {
       continue;
     }
+    if (filterStr || filterNum) {
+      var script = scripts[i];
+      var found = false;
+      if (filterNum && !found) {
+        if (script.id && script.id === filterNum) {
+          found = true;
+        }
+      }
+      if (filterStr && !found) {
+        if (script.name && script.name.indexOf(filterStr) >= 0) {
+          found = true;
+        }
+      }
+      if (!found) continue;
+    }
     if (types & ScriptTypeFlag(scripts[i].type)) {
       response.body.push(MakeMirror(scripts[i]));
     }
@@ -2196,6 +2322,27 @@ DebugCommandProcessor.prototype.debuggerFlagsRequest_ = function(request,
 }
 
 
+DebugCommandProcessor.prototype.v8FlagsRequest_ = function(request, response) {
+  var flags = request.arguments.flags;
+  if (!flags) flags = '';
+  %SetFlags(flags);
+};
+
+
+DebugCommandProcessor.prototype.gcRequest_ = function(request, response) {
+  var type = request.arguments.type;
+  if (!type) type = 'all';
+
+  var before = %GetHeapUsage();
+  %CollectGarbage(type);
+  var after = %GetHeapUsage();
+
+  response.body = { "before": before, "after": after };
+};
+
+
+
+
 // Check whether the previously processed command caused the VM to become
 // running.
 DebugCommandProcessor.prototype.isRunning = function() {

deps/v8/src/debug.cc

@@ -622,7 +622,7 @@ bool Debug::disable_break_ = false;
 
 // Default call debugger on uncaught exception.
 bool Debug::break_on_exception_ = false;
-bool Debug::break_on_uncaught_exception_ = true;
+bool Debug::break_on_uncaught_exception_ = false;
 
 Handle<Context> Debug::debug_context_ = Handle<Context>();
 Code* Debug::debug_break_return_ = NULL;
@@ -2740,8 +2740,10 @@ bool Debugger::StartAgent(const char* name, int port,
   }
 
   if (Socket::Setup()) {
-    agent_ = new DebuggerAgent(name, port);
-    agent_->Start();
+    if (agent_ == NULL) {
+      agent_ = new DebuggerAgent(name, port);
+      agent_->Start();
+    }
     return true;
   }
 
@@ -3037,7 +3039,8 @@ void LockingCommandMessageQueue::Clear() {
 
 
 MessageDispatchHelperThread::MessageDispatchHelperThread()
-    : sem_(OS::CreateSemaphore(0)), mutex_(OS::CreateMutex()),
+    : Thread("v8:MsgDispHelpr"),
+      sem_(OS::CreateSemaphore(0)), mutex_(OS::CreateMutex()),
       already_signalled_(false) {
 }
 

deps/v8/src/debug.h

@@ -32,6 +32,7 @@
 #include "debug-agent.h"
 #include "execution.h"
 #include "factory.h"
+#include "flags.h"
 #include "hashmap.h"
 #include "platform.h"
 #include "string-stream.h"
@@ -772,6 +773,15 @@ class Debugger {
       }
     }
 
+    if (((event == v8::BeforeCompile) || (event == v8::AfterCompile)) &&
+        !FLAG_debug_compile_events) {
+      return false;
+
+    } else if ((event == v8::ScriptCollected) &&
+               !FLAG_debug_script_collected_events) {
+      return false;
+    }
+
     // Currently argument event is not used.
     return !compiling_natives_ && Debugger::IsDebuggerActive();
   }

deps/v8/src/deoptimizer.cc

@@ -309,9 +309,9 @@ void Deoptimizer::TearDown() {
 }
 
 
-unsigned Deoptimizer::GetOutputInfo(DeoptimizationOutputData* data,
-                                    unsigned id,
-                                    SharedFunctionInfo* shared) {
+int Deoptimizer::GetOutputInfo(DeoptimizationOutputData* data,
+                               unsigned id,
+                               SharedFunctionInfo* shared) {
   // TODO(kasperl): For now, we do a simple linear search for the PC
   // offset associated with the given node id. This should probably be
   // changed to a binary search.
@@ -618,17 +618,17 @@ void Deoptimizer::DoTranslateCommand(TranslationIterator* iterator,
     }
 
     case Translation::ARGUMENTS_OBJECT: {
-      // Use the hole value as a sentinel and fill in the arguments object
-      // after the deoptimized frame is built.
+      // Use the arguments marker value as a sentinel and fill in the arguments
+      // object after the deoptimized frame is built.
       ASSERT(frame_index == 0);  // Only supported for first frame.
       if (FLAG_trace_deopt) {
         PrintF("    0x%08" V8PRIxPTR ": [top + %d] <- ",
                output_[frame_index]->GetTop() + output_offset,
                output_offset);
-        Heap::the_hole_value()->ShortPrint();
+        Heap::arguments_marker()->ShortPrint();
         PrintF(" ; arguments object\n");
       }
-      intptr_t value = reinterpret_cast<intptr_t>(Heap::the_hole_value());
+      intptr_t value = reinterpret_cast<intptr_t>(Heap::arguments_marker());
       output_[frame_index]->SetFrameSlot(output_offset, value);
       return;
     }

deps/v8/src/deoptimizer.h

@@ -145,9 +145,9 @@ class Deoptimizer : public Malloced {
 
   static Address GetDeoptimizationEntry(int id, BailoutType type);
   static int GetDeoptimizationId(Address addr, BailoutType type);
-  static unsigned GetOutputInfo(DeoptimizationOutputData* data,
-                                unsigned node_id,
-                                SharedFunctionInfo* shared);
+  static int GetOutputInfo(DeoptimizationOutputData* data,
+                           unsigned node_id,
+                           SharedFunctionInfo* shared);
 
   static void Setup();
   static void TearDown();

deps/v8/src/disassembler.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -268,10 +268,13 @@ static int DecodeIt(FILE* f,
                              Code::Kind2String(kind),
                              CodeStub::MajorName(major_key, false));
             switch (major_key) {
-              case CodeStub::CallFunction:
-                out.AddFormatted("argc = %d", minor_key);
+              case CodeStub::CallFunction: {
+                int argc =
+                    CallFunctionStub::ExtractArgcFromMinorKey(minor_key);
+                out.AddFormatted("argc = %d", argc);
                 break;
-            default:
+              }
+              default:
                 out.AddFormatted("minor: %d", minor_key);
             }
           }

deps/v8/src/extensions/experimental/experimental.gyp

@@ -0,0 +1,50 @@
+# Copyright 2011 the V8 project authors. All rights reserved.
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+#       copyright notice, this list of conditions and the following
+#       disclaimer in the documentation and/or other materials provided
+#       with the distribution.
+#     * Neither the name of Google Inc. nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+{
+  'variables': {
+    'icu_src_dir%': '',
+  },
+  'targets': [
+    {
+      'target_name': 'i18n_api',
+      'type': 'static_library',
+      'sources': [
+        'i18n-extension.cc',
+        'i18n-extension.h',
+      ],
+      'include_dirs': [
+        '<(icu_src_dir)/public/common',
+        '../..',
+      ],
+      'dependencies': [
+        '<(icu_src_dir)/icu.gyp:*',
+        '../../../tools/gyp/v8.gyp:v8',
+      ],
+    },
+  ],  # targets
+}

deps/v8/src/factory.cc

@@ -99,6 +99,14 @@ Handle<String> Factory::LookupSymbol(Vector<const char> string) {
   CALL_HEAP_FUNCTION(Heap::LookupSymbol(string), String);
 }
 
+Handle<String> Factory::LookupAsciiSymbol(Vector<const char> string) {
+  CALL_HEAP_FUNCTION(Heap::LookupAsciiSymbol(string), String);
+}
+
+Handle<String> Factory::LookupTwoByteSymbol(Vector<const uc16> string) {
+  CALL_HEAP_FUNCTION(Heap::LookupTwoByteSymbol(string), String);
+}
+
 
 Handle<String> Factory::NewStringFromAscii(Vector<const char> string,
                                            PretenureFlag pretenure) {

deps/v8/src/factory.h

@@ -61,6 +61,8 @@ class Factory : public AllStatic {
       PretenureFlag pretenure);
 
   static Handle<String> LookupSymbol(Vector<const char> str);
+  static Handle<String> LookupAsciiSymbol(Vector<const char> str);
+  static Handle<String> LookupTwoByteSymbol(Vector<const uc16> str);
   static Handle<String> LookupAsciiSymbol(const char* str) {
     return LookupSymbol(CStrVector(str));
   }

deps/v8/src/flag-definitions.h

@@ -122,7 +122,6 @@ DEFINE_bool(trace_inlining, false, "trace inlining decisions")
 DEFINE_bool(trace_alloc, false, "trace register allocator")
 DEFINE_bool(trace_range, false, "trace range analysis")
 DEFINE_bool(trace_gvn, false, "trace global value numbering")
-DEFINE_bool(trace_environment, false, "trace lithium environments")
 DEFINE_bool(trace_representation, false, "trace representation types")
 DEFINE_bool(stress_pointer_maps, false, "pointer map for every instruction")
 DEFINE_bool(stress_environments, false, "environment for every instruction")
@@ -142,6 +141,7 @@ DEFINE_bool(use_osr, false, "use on-stack replacement")
 #endif
 DEFINE_bool(trace_osr, false, "trace on-stack replacement")
 DEFINE_int(stress_runs, 0, "number of stress runs")
+DEFINE_bool(optimize_closures, true, "optimize closures")
 
 // assembler-ia32.cc / assembler-arm.cc / assembler-x64.cc
 DEFINE_bool(debug_code, false,
@@ -356,6 +356,16 @@ DEFINE_string(map_counters, NULL, "Map counters to a file")
 DEFINE_args(js_arguments, JSArguments(),
             "Pass all remaining arguments to the script. Alias for \"--\".")
 
+#if defined(WEBOS__)
+DEFINE_bool(debug_compile_events, false, "Enable debugger compile events")
+DEFINE_bool(debug_script_collected_events, false,
+            "Enable debugger script collected events")
+#else
+DEFINE_bool(debug_compile_events, true, "Enable debugger compile events")
+DEFINE_bool(debug_script_collected_events, true,
+            "Enable debugger script collected events")
+#endif
+
 //
 // Debug only flags
 //

deps/v8/src/frames.cc

@@ -329,21 +329,20 @@ void SafeStackTraceFrameIterator::Advance() {
 
 
 Code* StackFrame::GetSafepointData(Address pc,
-                                   uint8_t** safepoint_entry,
+                                   SafepointEntry* safepoint_entry,
                                    unsigned* stack_slots) {
   PcToCodeCache::PcToCodeCacheEntry* entry = PcToCodeCache::GetCacheEntry(pc);
-  uint8_t* cached_safepoint_entry = entry->safepoint_entry;
-  if (cached_safepoint_entry == NULL) {
-    cached_safepoint_entry = entry->code->GetSafepointEntry(pc);
-    ASSERT(cached_safepoint_entry != NULL);  // No safepoint found.
-    entry->safepoint_entry = cached_safepoint_entry;
+  SafepointEntry cached_safepoint_entry = entry->safepoint_entry;
+  if (!entry->safepoint_entry.is_valid()) {
+    entry->safepoint_entry = entry->code->GetSafepointEntry(pc);
+    ASSERT(entry->safepoint_entry.is_valid());
   } else {
-    ASSERT(cached_safepoint_entry == entry->code->GetSafepointEntry(pc));
+    ASSERT(entry->safepoint_entry.Equals(entry->code->GetSafepointEntry(pc)));
   }
 
   // Fill in the results and return the code.
   Code* code = entry->code;
-  *safepoint_entry = cached_safepoint_entry;
+  *safepoint_entry = entry->safepoint_entry;
   *stack_slots = code->stack_slots();
   return code;
 }
@@ -536,7 +535,7 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
 
   // Compute the safepoint information.
   unsigned stack_slots = 0;
-  uint8_t* safepoint_entry = NULL;
+  SafepointEntry safepoint_entry;
   Code* code = StackFrame::GetSafepointData(
       pc(), &safepoint_entry, &stack_slots);
   unsigned slot_space = stack_slots * kPointerSize;
@@ -548,10 +547,22 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
   Object** parameters_limit = &Memory::Object_at(
       fp() + JavaScriptFrameConstants::kFunctionOffset - slot_space);
 
+  // Visit the parameters that may be on top of the saved registers.
+  if (safepoint_entry.argument_count() > 0) {
+    v->VisitPointers(parameters_base,
+                     parameters_base + safepoint_entry.argument_count());
+    parameters_base += safepoint_entry.argument_count();
+  }
+
+  if (safepoint_entry.has_doubles()) {
+    parameters_base += DoubleRegister::kNumAllocatableRegisters *
+        kDoubleSize / kPointerSize;
+  }
+
   // Visit the registers that contain pointers if any.
-  if (SafepointTable::HasRegisters(safepoint_entry)) {
+  if (safepoint_entry.HasRegisters()) {
     for (int i = kNumSafepointRegisters - 1; i >=0; i--) {
-      if (SafepointTable::HasRegisterAt(safepoint_entry, i)) {
+      if (safepoint_entry.HasRegisterAt(i)) {
         int reg_stack_index = MacroAssembler::SafepointRegisterStackIndex(i);
         v->VisitPointer(parameters_base + reg_stack_index);
       }
@@ -561,7 +572,8 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
   }
 
   // We're done dealing with the register bits.
-  safepoint_entry += kNumSafepointRegisters >> kBitsPerByteLog2;
+  uint8_t* safepoint_bits = safepoint_entry.bits();
+  safepoint_bits += kNumSafepointRegisters >> kBitsPerByteLog2;
 
   // Visit the rest of the parameters.
   v->VisitPointers(parameters_base, parameters_limit);
@@ -570,7 +582,7 @@ void OptimizedFrame::Iterate(ObjectVisitor* v) const {
   for (unsigned index = 0; index < stack_slots; index++) {
     int byte_index = index >> kBitsPerByteLog2;
     int bit_index = index & (kBitsPerByte - 1);
-    if ((safepoint_entry[byte_index] & (1U << bit_index)) != 0) {
+    if ((safepoint_bits[byte_index] & (1U << bit_index)) != 0) {
       v->VisitPointer(parameters_limit + index);
     }
   }
@@ -778,14 +790,8 @@ DeoptimizationInputData* OptimizedFrame::GetDeoptimizationData(
   ASSERT(code != NULL);
   ASSERT(code->kind() == Code::OPTIMIZED_FUNCTION);
 
-  SafepointTable table(code);
-  unsigned pc_offset = static_cast<unsigned>(pc() - code->instruction_start());
-  for (unsigned i = 0; i < table.length(); i++) {
-    if (table.GetPcOffset(i) == pc_offset) {
-      *deopt_index = table.GetDeoptimizationIndex(i);
-      break;
-    }
-  }
+  SafepointEntry safepoint_entry = code->GetSafepointEntry(pc());
+  *deopt_index = safepoint_entry.deoptimization_index();
   ASSERT(*deopt_index != AstNode::kNoNumber);
 
   return DeoptimizationInputData::cast(code->deoptimization_data());
@@ -1150,7 +1156,7 @@ PcToCodeCache::PcToCodeCacheEntry* PcToCodeCache::GetCacheEntry(Address pc) {
     // been set. Otherwise, we risk trying to use a cache entry before
     // the code has been computed.
     entry->code = GcSafeFindCodeForPc(pc);
-    entry->safepoint_entry = NULL;
+    entry->safepoint_entry.Reset();
     entry->pc = pc;
   }
   return entry;

deps/v8/src/frames.h

@@ -28,6 +28,8 @@
 #ifndef V8_FRAMES_H_
 #define V8_FRAMES_H_
 
+#include "safepoint-table.h"
+
 namespace v8 {
 namespace internal {
 
@@ -51,7 +53,7 @@ class PcToCodeCache : AllStatic {
   struct PcToCodeCacheEntry {
     Address pc;
     Code* code;
-    uint8_t* safepoint_entry;
+    SafepointEntry safepoint_entry;
   };
 
   static PcToCodeCacheEntry* cache(int index) {
@@ -208,7 +210,7 @@ class StackFrame BASE_EMBEDDED {
   // safepoint entry and the number of stack slots. The pc must be at
   // a safepoint.
   static Code* GetSafepointData(Address pc,
-                                uint8_t** safepoint_entry,
+                                SafepointEntry* safepoint_entry,
                                 unsigned* stack_slots);
 
   virtual void Iterate(ObjectVisitor* v) const = 0;

deps/v8/src/globals.h

@@ -181,10 +181,6 @@ typedef byte* Address;
 #define USING_BSD_ABI
 #endif
 
-// Code-point values in Unicode 4.0 are 21 bits wide.
-typedef uint16_t uc16;
-typedef int32_t uc32;
-
 // -----------------------------------------------------------------------------
 // Constants
 
@@ -228,6 +224,15 @@ const int kBinary32MinExponent  = 0x01;
 const int kBinary32MantissaBits = 23;
 const int kBinary32ExponentShift = 23;
 
+// ASCII/UC16 constants
+// Code-point values in Unicode 4.0 are 21 bits wide.
+typedef uint16_t uc16;
+typedef int32_t uc32;
+const int kASCIISize    = kCharSize;
+const int kUC16Size     = sizeof(uc16);      // NOLINT
+const uc32 kMaxAsciiCharCode = 0x7f;
+const uint32_t kMaxAsciiCharCodeU = 0x7fu;
+
 
 // The expression OFFSET_OF(type, field) computes the byte-offset
 // of the specified field relative to the containing type. This

deps/v8/src/handles.cc

@@ -280,13 +280,13 @@ Handle<Object> ForceDeleteProperty(Handle<JSObject> object,
 }
 
 
-Handle<Object> IgnoreAttributesAndSetLocalProperty(
+Handle<Object> SetLocalPropertyIgnoreAttributes(
     Handle<JSObject> object,
     Handle<String> key,
     Handle<Object> value,
     PropertyAttributes attributes) {
   CALL_HEAP_FUNCTION(object->
-      IgnoreAttributesAndSetLocalProperty(*key, *value, attributes), Object);
+      SetLocalPropertyIgnoreAttributes(*key, *value, attributes), Object);
 }
 
 
@@ -422,6 +422,15 @@ Handle<Object> SetElement(Handle<JSObject> object,
 }
 
 
+Handle<Object> SetOwnElement(Handle<JSObject> object,
+                             uint32_t index,
+                             Handle<Object> value) {
+  ASSERT(!object->HasPixelElements());
+  ASSERT(!object->HasExternalArrayElements());
+  CALL_HEAP_FUNCTION(object->SetElement(index, *value, false), Object);
+}
+
+
 Handle<JSObject> Copy(Handle<JSObject> obj) {
   CALL_HEAP_FUNCTION(Heap::CopyJSObject(*obj), JSObject);
 }

deps/v8/src/handles.h

@@ -217,9 +217,10 @@ Handle<Object> SetNormalizedProperty(Handle<JSObject> object,
 Handle<Object> ForceDeleteProperty(Handle<JSObject> object,
                                    Handle<Object> key);
 
-Handle<Object> IgnoreAttributesAndSetLocalProperty(Handle<JSObject> object,
-                                                   Handle<String> key,
-                                                   Handle<Object> value,
+Handle<Object> SetLocalPropertyIgnoreAttributes(
+    Handle<JSObject> object,
+    Handle<String> key,
+    Handle<Object> value,
     PropertyAttributes attributes);
 
 Handle<Object> SetPropertyWithInterceptor(Handle<JSObject> object,
@@ -231,6 +232,10 @@ Handle<Object> SetElement(Handle<JSObject> object,
                           uint32_t index,
                           Handle<Object> value);
 
+Handle<Object> SetOwnElement(Handle<JSObject> object,
+                             uint32_t index,
+                             Handle<Object> value);
+
 Handle<Object> GetProperty(Handle<JSObject> obj,
                            const char* name);
 

deps/v8/src/heap-inl.h

@@ -40,6 +40,19 @@ int Heap::MaxObjectSizeInPagedSpace() {
 }
 
 
+MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> str,
+                                          PretenureFlag pretenure) {
+  // Check for ASCII first since this is the common case.
+  if (String::IsAscii(str.start(), str.length())) {
+    // If the string is ASCII, we do not need to convert the characters
+    // since UTF8 is backwards compatible with ASCII.
+    return AllocateStringFromAscii(str, pretenure);
+  }
+  // Non-ASCII and we need to decode.
+  return AllocateStringFromUtf8Slow(str, pretenure);
+}
+
+
 MaybeObject* Heap::AllocateSymbol(Vector<const char> str,
                                   int chars,
                                   uint32_t hash_field) {
@@ -49,6 +62,71 @@ MaybeObject* Heap::AllocateSymbol(Vector<const char> str,
 }
 
 
+MaybeObject* Heap::AllocateAsciiSymbol(Vector<const char> str,
+                                       uint32_t hash_field) {
+  if (str.length() > SeqAsciiString::kMaxLength) {
+    return Failure::OutOfMemoryException();
+  }
+  // Compute map and object size.
+  Map* map = ascii_symbol_map();
+  int size = SeqAsciiString::SizeFor(str.length());
+
+  // Allocate string.
+  Object* result;
+  { MaybeObject* maybe_result = (size > MaxObjectSizeInPagedSpace())
+                   ? lo_space_->AllocateRaw(size)
+                   : old_data_space_->AllocateRaw(size);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+  }
+
+  reinterpret_cast<HeapObject*>(result)->set_map(map);
+  // Set length and hash fields of the allocated string.
+  String* answer = String::cast(result);
+  answer->set_length(str.length());
+  answer->set_hash_field(hash_field);
+
+  ASSERT_EQ(size, answer->Size());
+
+  // Fill in the characters.
+  memcpy(answer->address() + SeqAsciiString::kHeaderSize,
+         str.start(), str.length());
+
+  return answer;
+}
+
+
+MaybeObject* Heap::AllocateTwoByteSymbol(Vector<const uc16> str,
+                                         uint32_t hash_field) {
+  if (str.length() > SeqTwoByteString::kMaxLength) {
+    return Failure::OutOfMemoryException();
+  }
+  // Compute map and object size.
+  Map* map = symbol_map();
+  int size = SeqTwoByteString::SizeFor(str.length());
+
+  // Allocate string.
+  Object* result;
+  { MaybeObject* maybe_result = (size > MaxObjectSizeInPagedSpace())
+                   ? lo_space_->AllocateRaw(size)
+                   : old_data_space_->AllocateRaw(size);
+    if (!maybe_result->ToObject(&result)) return maybe_result;
+  }
+
+  reinterpret_cast<HeapObject*>(result)->set_map(map);
+  // Set length and hash fields of the allocated string.
+  String* answer = String::cast(result);
+  answer->set_length(str.length());
+  answer->set_hash_field(hash_field);
+
+  ASSERT_EQ(size, answer->Size());
+
+  // Fill in the characters.
+  memcpy(answer->address() + SeqTwoByteString::kHeaderSize,
+         str.start(), str.length() * kUC16Size);
+
+  return answer;
+}
+
 MaybeObject* Heap::CopyFixedArray(FixedArray* src) {
   return CopyFixedArrayWithMap(src, src->map());
 }

deps/v8/src/heap.cc

@@ -2011,6 +2011,12 @@ bool Heap::CreateInitialObjects() {
   }
   set_the_hole_value(obj);
 
+  { MaybeObject* maybe_obj = CreateOddball("arguments_marker",
+                                           Smi::FromInt(-4));
+    if (!maybe_obj->ToObject(&obj)) return false;
+  }
+  set_arguments_marker(obj);
+
   { MaybeObject* maybe_obj =
         CreateOddball("no_interceptor_result_sentinel", Smi::FromInt(-2));
     if (!maybe_obj->ToObject(&obj)) return false;
@@ -2549,20 +2555,10 @@ MaybeObject* Heap::AllocateExternalStringFromTwoByte(
   }
 
   // For small strings we check whether the resource contains only
-  // ascii characters.  If yes, we use a different string map.
-  bool is_ascii = true;
-  if (length >= static_cast<size_t>(String::kMinNonFlatLength)) {
-    is_ascii = false;
-  } else {
-    const uc16* data = resource->data();
-    for (size_t i = 0; i < length; i++) {
-      if (data[i] > String::kMaxAsciiCharCode) {
-        is_ascii = false;
-        break;
-      }
-    }
-  }
-
+  // ASCII characters.  If yes, we use a different string map.
+  static const size_t kAsciiCheckLengthLimit = 32;
+  bool is_ascii = length <= kAsciiCheckLengthLimit &&
+      String::IsAscii(resource->data(), static_cast<int>(length));
   Map* map = is_ascii ?
       Heap::external_string_with_ascii_data_map() : Heap::external_string_map();
   Object* result;
@@ -2728,6 +2724,9 @@ MaybeObject* Heap::CreateCode(const CodeDesc& desc,
   code->set_instruction_size(desc.instr_size);
   code->set_relocation_info(ByteArray::cast(reloc_info));
   code->set_flags(flags);
+  if (code->is_call_stub() || code->is_keyed_call_stub()) {
+    code->set_check_type(RECEIVER_MAP_CHECK);
+  }
   code->set_deoptimization_data(empty_fixed_array());
   // Allow self references to created code object by patching the handle to
   // point to the newly allocated Code object.
@@ -3307,8 +3306,8 @@ MaybeObject* Heap::AllocateStringFromAscii(Vector<const char> string,
 }
 
 
-MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> string,
-                                          PretenureFlag pretenure) {
+MaybeObject* Heap::AllocateStringFromUtf8Slow(Vector<const char> string,
+                                              PretenureFlag pretenure) {
   // V8 only supports characters in the Basic Multilingual Plane.
   const uc32 kMaxSupportedChar = 0xFFFF;
   // Count the number of characters in the UTF-8 string and check if
@@ -3317,17 +3316,11 @@ MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> string,
       decoder(ScannerConstants::utf8_decoder());
   decoder->Reset(string.start(), string.length());
   int chars = 0;
-  bool is_ascii = true;
   while (decoder->has_more()) {
-    uc32 r = decoder->GetNext();
-    if (r > String::kMaxAsciiCharCode) is_ascii = false;
+    decoder->GetNext();
     chars++;
   }
 
-  // If the string is ascii, we do not need to convert the characters
-  // since UTF8 is backwards compatible with ascii.
-  if (is_ascii) return AllocateStringFromAscii(string, pretenure);
-
   Object* result;
   { MaybeObject* maybe_result = AllocateRawTwoByteString(chars, pretenure);
     if (!maybe_result->ToObject(&result)) return maybe_result;
@@ -3348,11 +3341,8 @@ MaybeObject* Heap::AllocateStringFromUtf8(Vector<const char> string,
 MaybeObject* Heap::AllocateStringFromTwoByte(Vector<const uc16> string,
                                              PretenureFlag pretenure) {
   // Check if the string is an ASCII string.
-  int i = 0;
-  while (i < string.length() && string[i] <= String::kMaxAsciiCharCode) i++;
-
   MaybeObject* maybe_result;
-  if (i == string.length()) {  // It's an ASCII string.
+  if (String::IsAscii(string.start(), string.length())) {
     maybe_result = AllocateRawAsciiString(string.length(), pretenure);
   } else {  // It's not an ASCII string.
     maybe_result = AllocateRawTwoByteString(string.length(), pretenure);
@@ -4032,6 +4022,36 @@ MaybeObject* Heap::LookupSymbol(Vector<const char> string) {
 }
 
 
+MaybeObject* Heap::LookupAsciiSymbol(Vector<const char> string) {
+  Object* symbol = NULL;
+  Object* new_table;
+  { MaybeObject* maybe_new_table =
+        symbol_table()->LookupAsciiSymbol(string, &symbol);
+    if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
+  }
+  // Can't use set_symbol_table because SymbolTable::cast knows that
+  // SymbolTable is a singleton and checks for identity.
+  roots_[kSymbolTableRootIndex] = new_table;
+  ASSERT(symbol != NULL);
+  return symbol;
+}
+
+
+MaybeObject* Heap::LookupTwoByteSymbol(Vector<const uc16> string) {
+  Object* symbol = NULL;
+  Object* new_table;
+  { MaybeObject* maybe_new_table =
+        symbol_table()->LookupTwoByteSymbol(string, &symbol);
+    if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
+  }
+  // Can't use set_symbol_table because SymbolTable::cast knows that
+  // SymbolTable is a singleton and checks for identity.
+  roots_[kSymbolTableRootIndex] = new_table;
+  ASSERT(symbol != NULL);
+  return symbol;
+}
+
+
 MaybeObject* Heap::LookupSymbol(String* string) {
   if (string->IsSymbol()) return string;
   Object* symbol = NULL;
@@ -5012,7 +5032,7 @@ class UnreachableObjectsFilter : public HeapObjectsFilter {
       obj->SetMark();
     }
     UnmarkingVisitor visitor;
-    Heap::IterateRoots(&visitor, VISIT_ONLY_STRONG);
+    Heap::IterateRoots(&visitor, VISIT_ALL);
     while (visitor.can_process())
       visitor.ProcessNext();
   }

deps/v8/src/heap.h

@@ -53,6 +53,7 @@ namespace internal {
   V(Object, null_value, NullValue)                                             \
   V(Object, true_value, TrueValue)                                             \
   V(Object, false_value, FalseValue)                                           \
+  V(Object, arguments_marker, ArgumentsMarker)                                 \
   V(Map, heap_number_map, HeapNumberMap)                                       \
   V(Map, global_context_map, GlobalContextMap)                                 \
   V(Map, fixed_array_map, FixedArrayMap)                                       \
@@ -412,7 +413,10 @@ class Heap : public AllStatic {
   MUST_USE_RESULT static MaybeObject* AllocateStringFromAscii(
       Vector<const char> str,
       PretenureFlag pretenure = NOT_TENURED);
-  MUST_USE_RESULT static MaybeObject* AllocateStringFromUtf8(
+  MUST_USE_RESULT static inline MaybeObject* AllocateStringFromUtf8(
+      Vector<const char> str,
+      PretenureFlag pretenure = NOT_TENURED);
+  MUST_USE_RESULT static MaybeObject* AllocateStringFromUtf8Slow(
       Vector<const char> str,
       PretenureFlag pretenure = NOT_TENURED);
   MUST_USE_RESULT static MaybeObject* AllocateStringFromTwoByte(
@@ -428,6 +432,14 @@ class Heap : public AllStatic {
       int chars,
       uint32_t hash_field);
 
+  MUST_USE_RESULT static inline MaybeObject* AllocateAsciiSymbol(
+        Vector<const char> str,
+        uint32_t hash_field);
+
+  MUST_USE_RESULT static inline MaybeObject* AllocateTwoByteSymbol(
+        Vector<const uc16> str,
+        uint32_t hash_field);
+
   MUST_USE_RESULT static MaybeObject* AllocateInternalSymbol(
       unibrow::CharacterStream* buffer, int chars, uint32_t hash_field);
 
@@ -683,6 +695,9 @@ class Heap : public AllStatic {
   // failed.
   // Please note this function does not perform a garbage collection.
   MUST_USE_RESULT static MaybeObject* LookupSymbol(Vector<const char> str);
+  MUST_USE_RESULT static MaybeObject* LookupAsciiSymbol(Vector<const char> str);
+  MUST_USE_RESULT static MaybeObject* LookupTwoByteSymbol(
+      Vector<const uc16> str);
   MUST_USE_RESULT static MaybeObject* LookupAsciiSymbol(const char* str) {
     return LookupSymbol(CStrVector(str));
   }
@@ -1850,7 +1865,7 @@ class GCTracer BASE_EMBEDDED {
     }
 
     ~Scope() {
-      ASSERT((0 <= scope_) && (scope_ < kNumberOfScopes));
+      ASSERT(scope_ < kNumberOfScopes);  // scope_ is unsigned.
       tracer_->scopes_[scope_] += OS::TimeCurrentMillis() - start_time_;
     }
 

deps/v8/src/hydrogen-instructions.cc

@@ -1190,6 +1190,11 @@ void HStoreGlobal::PrintDataTo(StringStream* stream) const {
 }
 
 
+void HLoadContextSlot::PrintDataTo(StringStream* stream) const {
+  stream->Add("(%d, %d)", context_chain_length(), slot_index());
+}
+
+
 // Implementation of type inference and type conversions. Calculates
 // the inferred type of this instruction based on the input operands.
 

deps/v8/src/hydrogen-instructions.h

@@ -73,10 +73,10 @@ class LChunkBuilder;
 //       HCompare
 //       HCompareJSObjectEq
 //       HInstanceOf
+//       HInstanceOfKnownGlobal
 //       HLoadKeyed
 //         HLoadKeyedFastElement
 //         HLoadKeyedGeneric
-//       HLoadNamedGeneric
 //       HPower
 //       HStoreNamed
 //         HStoreNamedField
@@ -92,6 +92,7 @@ class LChunkBuilder;
 //       HCallNew
 //       HCallRuntime
 //     HCallStub
+//     HCheckPrototypeMaps
 //     HConstant
 //     HControlInstruction
 //       HDeoptimize
@@ -106,6 +107,7 @@ class LChunkBuilder;
 //     HGlobalObject
 //     HGlobalReceiver
 //     HLeaveInlined
+//     HLoadContextSlot
 //     HLoadGlobal
 //     HMaterializedLiteral
 //       HArrayLiteral
@@ -119,19 +121,21 @@ class LChunkBuilder;
 //       HStoreKeyedFastElement
 //       HStoreKeyedGeneric
 //     HUnaryOperation
-//       HArrayLength
 //       HBitNot
 //       HChange
 //       HCheckFunction
 //       HCheckInstanceType
 //       HCheckMap
 //       HCheckNonSmi
-//       HCheckPrototypeMaps
 //       HCheckSmi
 //       HDeleteProperty
+//       HFixedArrayLength
+//       HJSArrayLength
 //       HLoadElements
 //         HTypeofIs
 //       HLoadNamedField
+//       HLoadNamedGeneric
+//       HLoadFunctionPrototype
 //       HPushArgument
 //       HTypeof
 //       HUnaryMathOperation
@@ -170,7 +174,6 @@ class LChunkBuilder;
   V(ArgumentsElements)                         \
   V(ArgumentsLength)                           \
   V(ArgumentsObject)                           \
-  V(ArrayLength)                               \
   V(ArrayLiteral)                              \
   V(BitAnd)                                    \
   V(BitNot)                                    \
@@ -203,24 +206,29 @@ class LChunkBuilder;
   V(Deoptimize)                                \
   V(Div)                                       \
   V(EnterInlined)                              \
+  V(FixedArrayLength)                          \
   V(FunctionLiteral)                           \
   V(GlobalObject)                              \
   V(GlobalReceiver)                            \
   V(Goto)                                      \
   V(InstanceOf)                                \
+  V(InstanceOfKnownGlobal)                     \
   V(IsNull)                                    \
   V(IsObject)                                  \
   V(IsSmi)                                     \
   V(HasInstanceType)                           \
   V(HasCachedArrayIndex)                       \
+  V(JSArrayLength)                             \
   V(ClassOfTest)                               \
   V(LeaveInlined)                              \
+  V(LoadContextSlot)                           \
   V(LoadElements)                              \
   V(LoadGlobal)                                \
   V(LoadKeyedFastElement)                      \
   V(LoadKeyedGeneric)                          \
   V(LoadNamedField)                            \
   V(LoadNamedGeneric)                          \
+  V(LoadFunctionPrototype)                     \
   V(Mod)                                       \
   V(Mul)                                       \
   V(ObjectLiteral)                             \
@@ -256,6 +264,7 @@ class LChunkBuilder;
   V(GlobalVars)                                \
   V(Maps)                                      \
   V(ArrayLengths)                              \
+  V(FunctionPrototypes)                        \
   V(OsrEntries)
 
 #define DECLARE_INSTRUCTION(type)                   \
@@ -905,6 +914,9 @@ class HCompareMapAndBranch: public HUnaryControlInstruction {
   virtual HBasicBlock* FirstSuccessor() const { return true_destination_; }
   virtual HBasicBlock* SecondSuccessor() const { return false_destination_; }
 
+  HBasicBlock* true_destination() const { return true_destination_; }
+  HBasicBlock* false_destination() const { return false_destination_; }
+
   virtual void PrintDataTo(StringStream* stream) const;
 
   Handle<Map> map() const { return map_; }
@@ -1015,10 +1027,10 @@ class HChange: public HUnaryOperation {
 
 class HSimulate: public HInstruction {
  public:
-  HSimulate(int ast_id, int pop_count, int environment_height)
+  HSimulate(int ast_id, int pop_count, int environment_length)
       : ast_id_(ast_id),
         pop_count_(pop_count),
-        environment_height_(environment_height),
+        environment_length_(environment_length),
         values_(2),
         assigned_indexes_(2) {}
   virtual ~HSimulate() {}
@@ -1032,7 +1044,7 @@ class HSimulate: public HInstruction {
     ast_id_ = id;
   }
 
-  int environment_height() const { return environment_height_; }
+  int environment_length() const { return environment_length_; }
   int pop_count() const { return pop_count_; }
   const ZoneList<HValue*>* values() const { return &values_; }
   int GetAssignedIndexAt(int index) const {
@@ -1074,7 +1086,7 @@ class HSimulate: public HInstruction {
   }
   int ast_id_;
   int pop_count_;
-  int environment_height_;
+  int environment_length_;
   ZoneList<HValue*> values_;
   ZoneList<int> assigned_indexes_;
 };
@@ -1336,9 +1348,9 @@ class HCallRuntime: public HCall {
 };
 
 
-class HArrayLength: public HUnaryOperation {
+class HJSArrayLength: public HUnaryOperation {
  public:
-  explicit HArrayLength(HValue* value) : HUnaryOperation(value) {
+  explicit HJSArrayLength(HValue* value) : HUnaryOperation(value) {
     // The length of an array is stored as a tagged value in the array
     // object. It is guaranteed to be 32 bit integer, but it can be
     // represented as either a smi or heap number.
@@ -1351,7 +1363,23 @@ class HArrayLength: public HUnaryOperation {
     return Representation::Tagged();
   }
 
-  DECLARE_CONCRETE_INSTRUCTION(ArrayLength, "array_length")
+  DECLARE_CONCRETE_INSTRUCTION(JSArrayLength, "js_array_length")
+};
+
+
+class HFixedArrayLength: public HUnaryOperation {
+ public:
+  explicit HFixedArrayLength(HValue* value) : HUnaryOperation(value) {
+    set_representation(Representation::Tagged());
+    SetFlag(kDependsOnArrayLengths);
+    SetFlag(kUseGVN);
+  }
+
+  virtual Representation RequiredInputRepresentation(int index) const {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(FixedArrayLength, "fixed_array_length")
 };
 
 
@@ -1596,42 +1624,40 @@ class HCheckNonSmi: public HUnaryOperation {
 };
 
 
-class HCheckPrototypeMaps: public HUnaryOperation {
+class HCheckPrototypeMaps: public HInstruction {
  public:
-  HCheckPrototypeMaps(HValue* value,
-                      Handle<JSObject> holder,
-                      Handle<Map> receiver_map)
-      : HUnaryOperation(value),
-        holder_(holder),
-        receiver_map_(receiver_map) {
-    set_representation(Representation::Tagged());
+  HCheckPrototypeMaps(Handle<JSObject> prototype, Handle<JSObject> holder)
+      : prototype_(prototype), holder_(holder) {
     SetFlag(kUseGVN);
     SetFlag(kDependsOnMaps);
   }
 
-  virtual Representation RequiredInputRepresentation(int index) const {
-    return Representation::Tagged();
-  }
-
 #ifdef DEBUG
   virtual void Verify() const;
 #endif
 
+  Handle<JSObject> prototype() const { return prototype_; }
   Handle<JSObject> holder() const { return holder_; }
-  Handle<Map> receiver_map() const { return receiver_map_; }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check_prototype_maps")
 
+  virtual intptr_t Hashcode() const {
+    ASSERT(!Heap::IsAllocationAllowed());
+    intptr_t hash = reinterpret_cast<intptr_t>(*prototype());
+    hash = 17 * hash + reinterpret_cast<intptr_t>(*holder());
+    return hash;
+  }
+
  protected:
   virtual bool DataEquals(HValue* other) const {
     HCheckPrototypeMaps* b = HCheckPrototypeMaps::cast(other);
-    return holder_.is_identical_to(b->holder()) &&
-        receiver_map_.is_identical_to(b->receiver_map());
+    return prototype_.is_identical_to(b->prototype()) &&
+        holder_.is_identical_to(b->holder());
   }
 
  private:
+  Handle<JSObject> prototype_;
   Handle<JSObject> holder_;
-  Handle<Map> receiver_map_;
 };
 
 
@@ -1766,6 +1792,8 @@ class HConstant: public HInstruction {
 
   Handle<Object> handle() const { return handle_; }
 
+  bool InOldSpace() const { return !Heap::InNewSpace(*handle_); }
+
   virtual bool EmitAtUses() const { return !representation().IsDouble(); }
   virtual void PrintDataTo(StringStream* stream) const;
   virtual HType CalculateInferredType() const;
@@ -2236,6 +2264,28 @@ class HInstanceOf: public HBinaryOperation {
 };
 
 
+class HInstanceOfKnownGlobal: public HUnaryOperation {
+ public:
+  HInstanceOfKnownGlobal(HValue* left, Handle<JSFunction> right)
+      : HUnaryOperation(left), function_(right) {
+    set_representation(Representation::Tagged());
+    SetFlagMask(AllSideEffects());
+  }
+
+  Handle<JSFunction> function() { return function_; }
+
+  virtual Representation RequiredInputRepresentation(int index) const {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(InstanceOfKnownGlobal,
+                               "instance_of_known_global")
+
+ private:
+  Handle<JSFunction> function_;
+};
+
+
 class HPower: public HBinaryOperation {
  public:
   HPower(HValue* left, HValue* right)
@@ -2551,6 +2601,39 @@ class HStoreGlobal: public HUnaryOperation {
 };
 
 
+class HLoadContextSlot: public HInstruction {
+ public:
+  HLoadContextSlot(int context_chain_length , int slot_index)
+      : context_chain_length_(context_chain_length), slot_index_(slot_index) {
+    set_representation(Representation::Tagged());
+    SetFlag(kUseGVN);
+    SetFlag(kDependsOnCalls);
+  }
+
+  int context_chain_length() const { return context_chain_length_; }
+  int slot_index() const { return slot_index_; }
+
+  virtual void PrintDataTo(StringStream* stream) const;
+
+  virtual intptr_t Hashcode() const {
+    return context_chain_length() * 29 + slot_index();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadContextSlot, "load_context_slot")
+
+ protected:
+  virtual bool DataEquals(HValue* other) const {
+    HLoadContextSlot* b = HLoadContextSlot::cast(other);
+    return (context_chain_length() == b->context_chain_length())
+        && (slot_index() == b->slot_index());
+  }
+
+ private:
+  int context_chain_length_;
+  int slot_index_;
+};
+
+
 class HLoadNamedField: public HUnaryOperation {
  public:
   HLoadNamedField(HValue* object, bool is_in_object, int offset)
@@ -2617,6 +2700,27 @@ class HLoadNamedGeneric: public HUnaryOperation {
 };
 
 
+class HLoadFunctionPrototype: public HUnaryOperation {
+ public:
+  explicit HLoadFunctionPrototype(HValue* function)
+      : HUnaryOperation(function) {
+    set_representation(Representation::Tagged());
+    SetFlagMask(kDependsOnFunctionPrototypes);
+  }
+
+  HValue* function() const { return OperandAt(0); }
+
+  virtual Representation RequiredInputRepresentation(int index) const {
+    return Representation::Tagged();
+  }
+
+  DECLARE_CONCRETE_INSTRUCTION(LoadFunctionPrototype, "load_function_prototype")
+
+ protected:
+  virtual bool DataEquals(HValue* other) const { return true; }
+};
+
+
 class HLoadKeyed: public HBinaryOperation {
  public:
   HLoadKeyed(HValue* obj, HValue* key) : HBinaryOperation(obj, key) {
@@ -2663,6 +2767,12 @@ class HLoadKeyedGeneric: public HLoadKeyed {
 };
 
 
+static inline bool StoringValueNeedsWriteBarrier(HValue* value) {
+  return !value->type().IsSmi() &&
+      !(value->IsConstant() && HConstant::cast(value)->InOldSpace());
+}
+
+
 class HStoreNamed: public HBinaryOperation {
  public:
   HStoreNamed(HValue* obj, Handle<Object> name, HValue* val)
@@ -2680,6 +2790,10 @@ class HStoreNamed: public HBinaryOperation {
   HValue* value() const { return OperandAt(1); }
   void set_value(HValue* value) { SetOperandAt(1, value); }
 
+  bool NeedsWriteBarrier() const {
+    return StoringValueNeedsWriteBarrier(value());
+  }
+
   DECLARE_INSTRUCTION(StoreNamed)
 
  protected:
@@ -2760,6 +2874,10 @@ class HStoreKeyed: public HInstruction {
   HValue* key() const { return OperandAt(1); }
   HValue* value() const { return OperandAt(2); }
 
+  bool NeedsWriteBarrier() const {
+    return StoringValueNeedsWriteBarrier(value());
+  }
+
   DECLARE_INSTRUCTION(StoreKeyed)
 
  protected:
@@ -2779,10 +2897,6 @@ class HStoreKeyedFastElement: public HStoreKeyed {
     SetFlag(kChangesArrayElements);
   }
 
-  bool NeedsWriteBarrier() const {
-    return !value()->type().IsSmi();
-  }
-
   virtual Representation RequiredInputRepresentation(int index) const {
     // The key is supposed to be Integer32.
     return (index == 1) ? Representation::Integer32()

deps/v8/src/hydrogen.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -128,7 +128,7 @@ HSimulate* HBasicBlock::CreateSimulate(int id) {
   int push_count = environment->push_count();
   int pop_count = environment->pop_count();
 
-  int length = environment->values()->length();
+  int length = environment->length();
   HSimulate* instr = new HSimulate(id, pop_count, length);
   for (int i = push_count - 1; i >= 0; --i) {
     instr->AddPushedValue(environment->ExpressionStackAt(i));
@@ -222,7 +222,7 @@ void HBasicBlock::RegisterPredecessor(HBasicBlock* pred) {
     ASSERT(IsLoopHeader() || first_ == NULL);
     HEnvironment* incoming_env = pred->last_environment();
     if (IsLoopHeader()) {
-      ASSERT(phis()->length() == incoming_env->values()->length());
+      ASSERT(phis()->length() == incoming_env->length());
       for (int i = 0; i < phis_.length(); ++i) {
         phis_[i]->AddInput(incoming_env->values()->at(i));
       }
@@ -1982,7 +1982,7 @@ AstContext::AstContext(HGraphBuilder* owner, Expression::Context kind)
     : owner_(owner), kind_(kind), outer_(owner->ast_context()) {
   owner->set_ast_context(this);  // Push.
 #ifdef DEBUG
-  original_count_ = owner->environment()->total_count();
+  original_length_ = owner->environment()->length();
 #endif
 }
 
@@ -1995,14 +1995,14 @@ AstContext::~AstContext() {
 EffectContext::~EffectContext() {
   ASSERT(owner()->HasStackOverflow() ||
          !owner()->subgraph()->HasExit() ||
-         owner()->environment()->total_count() == original_count_);
+         owner()->environment()->length() == original_length_);
 }
 
 
 ValueContext::~ValueContext() {
   ASSERT(owner()->HasStackOverflow() ||
          !owner()->subgraph()->HasExit() ||
-         owner()->environment()->total_count() == original_count_ + 1);
+         owner()->environment()->length() == original_length_ + 1);
 }
 
 
@@ -2343,7 +2343,7 @@ void HGraphBuilder::SetupScope(Scope* scope) {
   }
 
   // Set the initial values of stack-allocated locals.
-  for (int i = count; i < environment()->values()->length(); ++i) {
+  for (int i = count; i < environment()->length(); ++i) {
     environment()->Bind(i, undefined_constant);
   }
 
@@ -2702,7 +2702,7 @@ void HSubgraph::PreProcessOsrEntry(IterationStatement* statement) {
   int osr_entry_id = statement->OsrEntryId();
   // We want the correct environment at the OsrEntry instruction.  Build
   // it explicitly.  The expression stack should be empty.
-  int count = osr_entry->last_environment()->total_count();
+  int count = osr_entry->last_environment()->length();
   ASSERT(count == (osr_entry->last_environment()->parameter_count() +
                    osr_entry->last_environment()->local_count()));
   for (int i = 0; i < count; ++i) {
@@ -2940,6 +2940,21 @@ void HGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
       BAILOUT("unsupported context for arguments object");
     }
     ast_context()->ReturnValue(environment()->Lookup(variable));
+  } else if (variable->IsContextSlot()) {
+    if (variable->mode() == Variable::CONST) {
+      BAILOUT("reference to const context slot");
+    }
+    Slot* slot = variable->AsSlot();
+    CompilationInfo* info = graph()->info();
+    int context_chain_length = info->function()->scope()->
+        ContextChainLength(slot->var()->scope());
+    ASSERT(context_chain_length >= 0);
+    // TODO(antonm): if slot's value is not modified by closures, instead
+    // of reading it out of context, we could just embed the value as
+    // a constant.
+    HLoadContextSlot* instr =
+        new HLoadContextSlot(context_chain_length, slot->index());
+    ast_context()->ReturnInstruction(instr, expr->id());
   } else if (variable->is_global()) {
     LookupResult lookup;
     LookupGlobalPropertyCell(variable, &lookup, false);
@@ -2956,7 +2971,7 @@ void HGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
     HLoadGlobal* instr = new HLoadGlobal(cell, check_hole);
     ast_context()->ReturnInstruction(instr, expr->id());
   } else {
-    BAILOUT("reference to non-stack-allocated/non-global variable");
+    BAILOUT("reference to a variable which requires dynamic lookup");
   }
 }
 
@@ -3103,8 +3118,15 @@ HBasicBlock* HGraphBuilder::BuildTypeSwitch(ZoneMapList* maps,
   // this basic block the current basic block.
   HBasicBlock* join_block = graph_->CreateBasicBlock();
   for (int i = 0; i < subgraphs->length(); ++i) {
-    if (subgraphs->at(i)->HasExit()) {
-      subgraphs->at(i)->exit_block()->Goto(join_block);
+    HSubgraph* subgraph = subgraphs->at(i);
+    if (subgraph->HasExit()) {
+      // In an effect context the value of the type switch is not needed.
+      // There is no need to merge it at the join block only to discard it.
+      HBasicBlock* subgraph_exit = subgraph->exit_block();
+      if (ast_context()->IsEffect()) {
+        subgraph_exit->last_environment()->Drop(1);
+      }
+      subgraph_exit->Goto(join_block);
     }
   }
 
@@ -3242,7 +3264,8 @@ void HGraphBuilder::HandlePolymorphicStoreNamedField(Assignment* expr,
     Push(value);
     instr->set_position(expr->position());
     AddInstruction(instr);
-    if (instr->HasSideEffects()) AddSimulate(expr->id());
+    if (instr->HasSideEffects()) AddSimulate(expr->AssignmentId());
+    ast_context()->ReturnValue(Pop());
   } else {
     // Build subgraph for generic store through IC.
     {
@@ -3260,11 +3283,14 @@ void HGraphBuilder::HandlePolymorphicStoreNamedField(Assignment* expr,
     }
 
     HBasicBlock* new_exit_block =
-        BuildTypeSwitch(&maps, &subgraphs, object, expr->AssignmentId());
+        BuildTypeSwitch(&maps, &subgraphs, object, expr->id());
     subgraph()->set_exit_block(new_exit_block);
+    // In an effect context, we did not materialized the value in the
+    // predecessor environments so there's no need to handle it here.
+    if (subgraph()->HasExit() && !ast_context()->IsEffect()) {
+      ast_context()->ReturnValue(Pop());
+    }
   }
-
-  if (subgraph()->HasExit()) ast_context()->ReturnValue(Pop());
 }
 
 
@@ -3471,7 +3497,7 @@ void HGraphBuilder::VisitAssignment(Assignment* expr) {
                                      Top(),
                                      expr->position(),
                                      expr->AssignmentId());
-    } else {
+    } else if (var->IsStackAllocated()) {
       // We allow reference to the arguments object only in assignemtns
       // to local variables to make sure that the arguments object does
       // not escape and is not modified.
@@ -3484,6 +3510,8 @@ void HGraphBuilder::VisitAssignment(Assignment* expr) {
         VISIT_FOR_VALUE(expr->value());
       }
       Bind(proxy->var(), Top());
+    } else {
+      BAILOUT("Assigning to no non-stack-allocated/non-global variable");
     }
     // Return the value.
     ast_context()->ReturnValue(Pop());
@@ -3548,8 +3576,7 @@ void HGraphBuilder::HandlePolymorphicLoadNamedField(Property* expr,
   if (maps.length() == 0) {
     HInstruction* instr = BuildLoadNamedGeneric(object, expr);
     instr->set_position(expr->position());
-    PushAndAdd(instr);
-    if (instr->HasSideEffects()) AddSimulate(expr->id());
+    ast_context()->ReturnInstruction(instr, expr->id());
   } else {
     // Build subgraph for generic load through IC.
     {
@@ -3568,9 +3595,12 @@ void HGraphBuilder::HandlePolymorphicLoadNamedField(Property* expr,
     HBasicBlock* new_exit_block =
         BuildTypeSwitch(&maps, &subgraphs, object, expr->id());
     subgraph()->set_exit_block(new_exit_block);
+    // In an effect context, we did not materialized the value in the
+    // predecessor environments so there's no need to handle it here.
+    if (subgraph()->HasExit() && !ast_context()->IsEffect()) {
+      ast_context()->ReturnValue(Pop());
+    }
   }
-
-  if (subgraph()->HasExit()) ast_context()->ReturnValue(Pop());
 }
 
 
@@ -3643,9 +3673,18 @@ HInstruction* HGraphBuilder::BuildLoadKeyedFastElement(HValue* object,
   Handle<Map> map = expr->GetMonomorphicReceiverType();
   ASSERT(map->has_fast_elements());
   AddInstruction(new HCheckMap(object, map));
-  HInstruction* elements = AddInstruction(new HLoadElements(object));
-  HInstruction* length = AddInstruction(new HArrayLength(elements));
-  AddInstruction(new HBoundsCheck(key, length));
+  bool is_array = (map->instance_type() == JS_ARRAY_TYPE);
+  HLoadElements* elements = new HLoadElements(object);
+  HInstruction* length = NULL;
+  if (is_array) {
+    length = AddInstruction(new HJSArrayLength(object));
+    AddInstruction(new HBoundsCheck(key, length));
+    AddInstruction(elements);
+  } else {
+    AddInstruction(elements);
+    length = AddInstruction(new HFixedArrayLength(elements));
+    AddInstruction(new HBoundsCheck(key, length));
+  }
   return new HLoadKeyedFastElement(elements, key);
 }
 
@@ -3671,9 +3710,9 @@ HInstruction* HGraphBuilder::BuildStoreKeyedFastElement(HValue* object,
   bool is_array = (map->instance_type() == JS_ARRAY_TYPE);
   HInstruction* length = NULL;
   if (is_array) {
-    length = AddInstruction(new HArrayLength(object));
+    length = AddInstruction(new HJSArrayLength(object));
   } else {
-    length = AddInstruction(new HArrayLength(elements));
+    length = AddInstruction(new HFixedArrayLength(elements));
   }
   AddInstruction(new HBoundsCheck(key, length));
   return new HStoreKeyedFastElement(elements, key, val);
@@ -3720,7 +3759,13 @@ void HGraphBuilder::VisitProperty(Property* expr) {
   if (expr->IsArrayLength()) {
     HValue* array = Pop();
     AddInstruction(new HCheckNonSmi(array));
-    instr = new HArrayLength(array);
+    AddInstruction(new HCheckInstanceType(array, JS_ARRAY_TYPE, JS_ARRAY_TYPE));
+    instr = new HJSArrayLength(array);
+
+  } else if (expr->IsFunctionPrototype()) {
+    HValue* function = Pop();
+    AddInstruction(new HCheckNonSmi(function));
+    instr = new HLoadFunctionPrototype(function);
 
   } else if (expr->key()->IsPropertyName()) {
     Handle<String> name = expr->key()->AsLiteral()->AsPropertyName();
@@ -3767,9 +3812,9 @@ void HGraphBuilder::AddCheckConstantFunction(Call* expr,
     AddInstruction(new HCheckMap(receiver, receiver_map));
   }
   if (!expr->holder().is_null()) {
-    AddInstruction(new HCheckPrototypeMaps(receiver,
-                                           expr->holder(),
-                                           receiver_map));
+    AddInstruction(new HCheckPrototypeMaps(
+        Handle<JSObject>(JSObject::cast(receiver_map->prototype())),
+        expr->holder()));
   }
 }
 
@@ -3841,7 +3886,11 @@ void HGraphBuilder::HandlePolymorphicCallNamed(Call* expr,
     HBasicBlock* new_exit_block =
         BuildTypeSwitch(&maps, &subgraphs, receiver, expr->id());
     subgraph()->set_exit_block(new_exit_block);
-    if (new_exit_block != NULL) ast_context()->ReturnValue(Pop());
+    // In an effect context, we did not materialized the value in the
+    // predecessor environments so there's no need to handle it here.
+    if (new_exit_block != NULL && !ast_context()->IsEffect()) {
+      ast_context()->ReturnValue(Pop());
+    }
   }
 }
 
@@ -3977,7 +4026,9 @@ bool HGraphBuilder::TryInline(Call* expr) {
     function_return_->MarkAsInlineReturnTarget();
   }
   call_context_ = ast_context();
-  TypeFeedbackOracle new_oracle(Handle<Code>(shared->code()));
+  TypeFeedbackOracle new_oracle(
+      Handle<Code>(shared->code()),
+      Handle<Context>(target->context()->global_context()));
   oracle_ = &new_oracle;
   graph()->info()->SetOsrAstId(AstNode::kNoNumber);
 
@@ -4179,7 +4230,8 @@ bool HGraphBuilder::TryCallApply(Call* expr) {
   HValue* arg_two_value = environment()->Lookup(arg_two->var());
   if (!arg_two_value->CheckFlag(HValue::kIsArguments)) return false;
 
-  if (!expr->IsMonomorphic()) return false;
+  if (!expr->IsMonomorphic() ||
+      expr->check_type() != RECEIVER_MAP_CHECK) return false;
 
   // Found pattern f.apply(receiver, arguments).
   VisitForValue(prop->obj());
@@ -4248,7 +4300,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
     expr->RecordTypeFeedback(oracle());
     ZoneMapList* types = expr->GetReceiverTypes();
 
-    if (expr->IsMonomorphic()) {
+    if (expr->IsMonomorphic() && expr->check_type() == RECEIVER_MAP_CHECK) {
       AddCheckConstantFunction(expr, receiver, types->first(), true);
 
       if (TryMathFunctionInline(expr)) {
@@ -4273,6 +4325,7 @@ void HGraphBuilder::VisitCall(Call* expr) {
       }
 
     } else if (types != NULL && types->length() > 1) {
+      ASSERT(expr->check_type() == RECEIVER_MAP_CHECK);
       HandlePolymorphicCallNamed(expr, receiver, types, name);
       return;
 
@@ -4847,14 +4900,49 @@ void HGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
   TypeInfo info = oracle()->CompareType(expr, TypeFeedbackOracle::RESULT);
   HInstruction* instr = NULL;
   if (op == Token::INSTANCEOF) {
-    instr = new HInstanceOf(left, right);
+    // Check to see if the rhs of the instanceof is a global function not
+    // residing in new space. If it is we assume that the function will stay the
+    // same.
+    Handle<JSFunction> target = Handle<JSFunction>::null();
+    Variable* var = expr->right()->AsVariableProxy()->AsVariable();
+    bool global_function = (var != NULL) && var->is_global() && !var->is_this();
+    CompilationInfo* info = graph()->info();
+    if (global_function &&
+        info->has_global_object() &&
+        !info->global_object()->IsAccessCheckNeeded()) {
+      Handle<String> name = var->name();
+      Handle<GlobalObject> global(info->global_object());
+      LookupResult lookup;
+      global->Lookup(*name, &lookup);
+      if (lookup.IsProperty() &&
+          lookup.type() == NORMAL &&
+          lookup.GetValue()->IsJSFunction()) {
+        Handle<JSFunction> candidate(JSFunction::cast(lookup.GetValue()));
+        // If the function is in new space we assume it's more likely to
+        // change and thus prefer the general IC code.
+        if (!Heap::InNewSpace(*candidate)) {
+          target = candidate;
+        }
+      }
+    }
+
+    // If the target is not null we have found a known global function that is
+    // assumed to stay the same for this instanceof.
+    if (target.is_null()) {
+      instr = new HInstanceOf(left, right);
+    } else {
+      AddInstruction(new HCheckFunction(right, target));
+      instr = new HInstanceOfKnownGlobal(left, target);
+    }
   } else if (op == Token::IN) {
     BAILOUT("Unsupported comparison: in");
   } else if (info.IsNonPrimitive()) {
     switch (op) {
       case Token::EQ:
       case Token::EQ_STRICT: {
+        AddInstruction(new HCheckNonSmi(left));
         AddInstruction(HCheckInstanceType::NewIsJSObjectOrJSFunction(left));
+        AddInstruction(new HCheckNonSmi(right));
         AddInstruction(HCheckInstanceType::NewIsJSObjectOrJSFunction(right));
         instr = new HCompareJSObjectEq(left, right);
         break;
@@ -5262,6 +5350,19 @@ void HEnvironment::Initialize(int parameter_count,
 }
 
 
+void HEnvironment::Initialize(const HEnvironment* other) {
+  closure_ = other->closure();
+  values_.AddAll(other->values_);
+  assigned_variables_.AddAll(other->assigned_variables_);
+  parameter_count_ = other->parameter_count_;
+  local_count_ = other->local_count_;
+  if (other->outer_ != NULL) outer_ = other->outer_->Copy();  // Deep copy.
+  pop_count_ = other->pop_count_;
+  push_count_ = other->push_count_;
+  ast_id_ = other->ast_id_;
+}
+
+
 void HEnvironment::AddIncomingEdge(HBasicBlock* block, HEnvironment* other) {
   ASSERT(!block->IsLoopHeader());
   ASSERT(values_.length() == other->values_.length());
@@ -5292,26 +5393,45 @@ void HEnvironment::AddIncomingEdge(HBasicBlock* block, HEnvironment* other) {
 }
 
 
-void HEnvironment::Initialize(const HEnvironment* other) {
-  closure_ = other->closure();
-  values_.AddAll(other->values_);
-  assigned_variables_.AddAll(other->assigned_variables_);
-  parameter_count_ = other->parameter_count_;
-  local_count_ = other->local_count_;
-  if (other->outer_ != NULL) outer_ = other->outer_->Copy();  // Deep copy.
-  pop_count_ = other->pop_count_;
-  push_count_ = other->push_count_;
-  ast_id_ = other->ast_id_;
+void HEnvironment::Bind(int index, HValue* value) {
+  ASSERT(value != NULL);
+  if (!assigned_variables_.Contains(index)) {
+    assigned_variables_.Add(index);
+  }
+  values_[index] = value;
 }
 
 
-int HEnvironment::IndexFor(Variable* variable) const {
-  Slot* slot = variable->AsSlot();
-  ASSERT(slot != NULL && slot->IsStackAllocated());
-  if (slot->type() == Slot::PARAMETER) {
-    return slot->index() + 1;
-  } else {
-    return parameter_count_ + slot->index();
+bool HEnvironment::HasExpressionAt(int index) const {
+  return index >= parameter_count_ + local_count_;
+}
+
+
+bool HEnvironment::ExpressionStackIsEmpty() const {
+  int first_expression = parameter_count() + local_count();
+  ASSERT(length() >= first_expression);
+  return length() == first_expression;
+}
+
+
+void HEnvironment::SetExpressionStackAt(int index_from_top, HValue* value) {
+  int count = index_from_top + 1;
+  int index = values_.length() - count;
+  ASSERT(HasExpressionAt(index));
+  // The push count must include at least the element in question or else
+  // the new value will not be included in this environment's history.
+  if (push_count_ < count) {
+    // This is the same effect as popping then re-pushing 'count' elements.
+    pop_count_ += (count - push_count_);
+    push_count_ = count;
+  }
+  values_[index] = value;
+}
+
+
+void HEnvironment::Drop(int count) {
+  for (int i = 0; i < count; ++i) {
+    Pop();
   }
 }
 
@@ -5376,7 +5496,7 @@ HEnvironment* HEnvironment::CopyForInlining(Handle<JSFunction> target,
 
 
 void HEnvironment::PrintTo(StringStream* stream) {
-  for (int i = 0; i < total_count(); i++) {
+  for (int i = 0; i < length(); i++) {
     if (i == 0) stream->Add("parameters\n");
     if (i == parameter_count()) stream->Add("locals\n");
     if (i == parameter_count() + local_count()) stream->Add("expressions");
@@ -5614,31 +5734,40 @@ void HStatistics::Print() {
     PrintF("%30s", names_[i]);
     double ms = static_cast<double>(timing_[i]) / 1000;
     double percent = static_cast<double>(timing_[i]) * 100 / sum;
-    PrintF(" - %0.3f ms / %0.3f %% \n", ms, percent);
+    PrintF(" - %7.3f ms / %4.1f %% ", ms, percent);
+
+    unsigned size = sizes_[i];
+    double size_percent = static_cast<double>(size) * 100 / total_size_;
+    PrintF(" %8u bytes / %4.1f %%\n", size, size_percent);
   }
-  PrintF("%30s - %0.3f ms \n", "Sum", static_cast<double>(sum) / 1000);
+  PrintF("%30s - %7.3f ms           %8u bytes\n", "Sum",
+         static_cast<double>(sum) / 1000,
+         total_size_);
   PrintF("---------------------------------------------------------------\n");
-  PrintF("%30s - %0.3f ms (%0.1f times slower than full code gen)\n",
+  PrintF("%30s - %7.3f ms (%.1f times slower than full code gen)\n",
          "Total",
          static_cast<double>(total_) / 1000,
          static_cast<double>(total_) / full_code_gen_);
 }
 
 
-void HStatistics::SaveTiming(const char* name, int64_t ticks) {
+void HStatistics::SaveTiming(const char* name, int64_t ticks, unsigned size) {
   if (name == HPhase::kFullCodeGen) {
     full_code_gen_ += ticks;
   } else if (name == HPhase::kTotal) {
     total_ += ticks;
   } else {
+    total_size_ += size;
     for (int i = 0; i < names_.length(); ++i) {
       if (names_[i] == name) {
         timing_[i] += ticks;
+        sizes_[i] += size;
         return;
       }
     }
     names_.Add(name);
     timing_.Add(ticks);
+    sizes_.Add(size);
   }
 }
 
@@ -5659,13 +5788,15 @@ void HPhase::Begin(const char* name,
     chunk_ = allocator->chunk();
   }
   if (FLAG_time_hydrogen) start_ = OS::Ticks();
+  start_allocation_size_ = Zone::allocation_size_;
 }
 
 
 void HPhase::End() const {
   if (FLAG_time_hydrogen) {
     int64_t end = OS::Ticks();
-    HStatistics::Instance()->SaveTiming(name_, end - start_);
+    unsigned size = Zone::allocation_size_ - start_allocation_size_;
+    HStatistics::Instance()->SaveTiming(name_, end - start_, size);
   }
 
   if (FLAG_trace_hydrogen) {
@@ -5678,7 +5809,6 @@ void HPhase::End() const {
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
-  if (chunk_ != NULL) chunk_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }

deps/v8/src/hydrogen.h

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -401,27 +401,33 @@ class HEnvironment: public ZoneObject {
                Scope* scope,
                Handle<JSFunction> closure);
 
+  // Simple accessors.
+  Handle<JSFunction> closure() const { return closure_; }
+  const ZoneList<HValue*>* values() const { return &values_; }
+  const ZoneList<int>* assigned_variables() const {
+    return &assigned_variables_;
+  }
+  int parameter_count() const { return parameter_count_; }
+  int local_count() const { return local_count_; }
+  HEnvironment* outer() const { return outer_; }
+  int pop_count() const { return pop_count_; }
+  int push_count() const { return push_count_; }
+
+  int ast_id() const { return ast_id_; }
+  void set_ast_id(int id) { ast_id_ = id; }
+
+  int length() const { return values_.length(); }
+
   void Bind(Variable* variable, HValue* value) {
     Bind(IndexFor(variable), value);
-
-    if (FLAG_trace_environment) {
-      PrintF("Slot index=%d name=%s\n",
-             variable->AsSlot()->index(),
-             *variable->name()->ToCString());
-    }
   }
 
-  void Bind(int index, HValue* value) {
-    ASSERT(value != NULL);
-    if (!assigned_variables_.Contains(index)) {
-      assigned_variables_.Add(index);
-    }
-    values_[index] = value;
-  }
+  void Bind(int index, HValue* value);
 
   HValue* Lookup(Variable* variable) const {
     return Lookup(IndexFor(variable));
   }
+
   HValue* Lookup(int index) const {
     HValue* result = values_[index];
     ASSERT(result != NULL);
@@ -434,53 +440,28 @@ class HEnvironment: public ZoneObject {
     values_.Add(value);
   }
 
-  HValue* Top() const { return ExpressionStackAt(0); }
-
-  HValue* ExpressionStackAt(int index_from_top) const {
-    int index = values_.length() - index_from_top - 1;
-    ASSERT(IsExpressionStackIndex(index));
-    return values_[index];
-  }
-
-  void SetExpressionStackAt(int index_from_top, HValue* value) {
-    int index = values_.length() - index_from_top - 1;
-    ASSERT(IsExpressionStackIndex(index));
-    values_[index] = value;
-  }
-
   HValue* Pop() {
-    ASSERT(!IsExpressionStackEmpty());
+    ASSERT(!ExpressionStackIsEmpty());
     if (push_count_ > 0) {
       --push_count_;
-      ASSERT(push_count_ >= 0);
     } else {
       ++pop_count_;
     }
     return values_.RemoveLast();
   }
 
-  void Drop(int count) {
-    for (int i = 0; i < count; ++i) {
-      Pop();
-    }
-  }
-
-  Handle<JSFunction> closure() const { return closure_; }
+  void Drop(int count);
 
-  // ID of the original AST node to identify deoptimization points.
-  int ast_id() const { return ast_id_; }
-  void set_ast_id(int id) { ast_id_ = id; }
+  HValue* Top() const { return ExpressionStackAt(0); }
 
-  const ZoneList<HValue*>* values() const { return &values_; }
-  const ZoneList<int>* assigned_variables() const {
-    return &assigned_variables_;
+  HValue* ExpressionStackAt(int index_from_top) const {
+    int index = length() - index_from_top - 1;
+    ASSERT(HasExpressionAt(index));
+    return values_[index];
   }
-  int parameter_count() const { return parameter_count_; }
-  int local_count() const { return local_count_; }
-  int push_count() const { return push_count_; }
-  int pop_count() const { return pop_count_; }
-  int total_count() const { return values_.length(); }
-  HEnvironment* outer() const { return outer_; }
+
+  void SetExpressionStackAt(int index_from_top, HValue* value);
+
   HEnvironment* Copy() const;
   HEnvironment* CopyWithoutHistory() const;
   HEnvironment* CopyAsLoopHeader(HBasicBlock* block) const;
@@ -496,13 +477,15 @@ class HEnvironment: public ZoneObject {
                                 HConstant* undefined) const;
 
   void AddIncomingEdge(HBasicBlock* block, HEnvironment* other);
+
   void ClearHistory() {
     pop_count_ = 0;
     push_count_ = 0;
     assigned_variables_.Clear();
   }
+
   void SetValueAt(int index, HValue* value) {
-    ASSERT(index < total_count());
+    ASSERT(index < length());
     values_[index] = value;
   }
 
@@ -512,19 +495,23 @@ class HEnvironment: public ZoneObject {
  private:
   explicit HEnvironment(const HEnvironment* other);
 
-  bool IsExpressionStackIndex(int index) const {
-    return index >= parameter_count_ + local_count_;
-  }
-  bool IsExpressionStackEmpty() const {
-    int length = values_.length();
-    int first_expression = parameter_count() + local_count();
-    ASSERT(length >= first_expression);
-    return length == first_expression;
-  }
+  // True if index is included in the expression stack part of the environment.
+  bool HasExpressionAt(int index) const;
+
+  bool ExpressionStackIsEmpty() const;
+
   void Initialize(int parameter_count, int local_count, int stack_height);
   void Initialize(const HEnvironment* other);
-  int VariableToIndex(Variable* var);
-  int IndexFor(Variable* variable) const;
+
+  // Map a variable to an environment index.  Parameter indices are shifted
+  // by 1 (receiver is parameter index -1 but environment index 0).
+  // Stack-allocated local indices are shifted by the number of parameters.
+  int IndexFor(Variable* variable) const {
+    Slot* slot = variable->AsSlot();
+    ASSERT(slot != NULL && slot->IsStackAllocated());
+    int shift = (slot->type() == Slot::PARAMETER) ? 1 : parameter_count_;
+    return slot->index() + shift;
+  }
 
   Handle<JSFunction> closure_;
   // Value array [parameters] [locals] [temporaries].
@@ -567,7 +554,7 @@ class AstContext {
   // We want to be able to assert, in a context-specific way, that the stack
   // height makes sense when the context is filled.
 #ifdef DEBUG
-  int original_count_;
+  int original_length_;
 #endif
 
  private:
@@ -919,7 +906,7 @@ class HValueMap: public ZoneObject {
 class HStatistics: public Malloced {
  public:
   void Print();
-  void SaveTiming(const char* name, int64_t ticks);
+  void SaveTiming(const char* name, int64_t ticks, unsigned size);
   static HStatistics* Instance() {
     static SetOncePointer<HStatistics> instance;
     if (!instance.is_set()) {
@@ -930,11 +917,19 @@ class HStatistics: public Malloced {
 
  private:
 
-  HStatistics() : timing_(5), names_(5), total_(0), full_code_gen_(0) { }
+  HStatistics()
+      : timing_(5),
+        names_(5),
+        sizes_(5),
+        total_(0),
+        total_size_(0),
+        full_code_gen_(0) { }
 
   List<int64_t> timing_;
   List<const char*> names_;
+  List<unsigned> sizes_;
   int64_t total_;
+  unsigned total_size_;
   int64_t full_code_gen_;
 };
 
@@ -971,6 +966,7 @@ class HPhase BASE_EMBEDDED {
   HGraph* graph_;
   LChunk* chunk_;
   LAllocator* allocator_;
+  unsigned start_allocation_size_;
 };
 
 

deps/v8/src/ia32/assembler-ia32.cc

@@ -2465,6 +2465,17 @@ void Assembler::pxor(XMMRegister dst, XMMRegister src) {
 }
 
 
+void Assembler::por(XMMRegister dst, XMMRegister src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0xEB);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::ptest(XMMRegister dst, XMMRegister src) {
   ASSERT(CpuFeatures::IsEnabled(SSE4_1));
   EnsureSpace ensure_space(this);
@@ -2489,6 +2500,40 @@ void Assembler::psllq(XMMRegister reg, int8_t shift) {
 }
 
 
+void Assembler::psllq(XMMRegister dst, XMMRegister src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0xF3);
+  emit_sse_operand(dst, src);
+}
+
+
+void Assembler::psrlq(XMMRegister reg, int8_t shift) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0x73);
+  emit_sse_operand(edx, reg);  // edx == 2
+  EMIT(shift);
+}
+
+
+void Assembler::psrlq(XMMRegister dst, XMMRegister src) {
+  ASSERT(CpuFeatures::IsEnabled(SSE2));
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x66);
+  EMIT(0x0F);
+  EMIT(0xD3);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::pshufd(XMMRegister dst, XMMRegister src, int8_t shuffle) {
   ASSERT(CpuFeatures::IsEnabled(SSE2));
   EnsureSpace ensure_space(this);

deps/v8/src/ia32/assembler-ia32.h

@@ -919,9 +919,13 @@ class Assembler : public Malloced {
 
   void pand(XMMRegister dst, XMMRegister src);
   void pxor(XMMRegister dst, XMMRegister src);
+  void por(XMMRegister dst, XMMRegister src);
   void ptest(XMMRegister dst, XMMRegister src);
 
   void psllq(XMMRegister reg, int8_t shift);
+  void psllq(XMMRegister dst, XMMRegister src);
+  void psrlq(XMMRegister reg, int8_t shift);
+  void psrlq(XMMRegister dst, XMMRegister src);
   void pshufd(XMMRegister dst, XMMRegister src, int8_t shuffle);
   void pextrd(const Operand& dst, XMMRegister src, int8_t offset);
 

deps/v8/src/ia32/builtins-ia32.cc

@@ -399,7 +399,7 @@ void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                              bool is_construct) {
   // Clear the context before we push it when entering the JS frame.
-  __ xor_(esi, Operand(esi));  // clear esi
+  __ Set(esi, Immediate(0));
 
   // Enter an internal frame.
   __ EnterInternalFrame();
@@ -421,7 +421,7 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
 
   // Copy arguments to the stack in a loop.
   Label loop, entry;
-  __ xor_(ecx, Operand(ecx));  // clear ecx
+  __ Set(ecx, Immediate(0));
   __ jmp(&entry);
   __ bind(&loop);
   __ mov(edx, Operand(ebx, ecx, times_4, 0));  // push parameter from argv
@@ -644,7 +644,7 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   __ bind(&non_function);
   __ mov(Operand(esp, eax, times_4, 0), edi);
   // Clear edi to indicate a non-function being called.
-  __ xor_(edi, Operand(edi));
+  __ Set(edi, Immediate(0));
 
   // 4. Shift arguments and return address one slot down on the stack
   //    (overwriting the original receiver).  Adjust argument count to make
@@ -665,7 +665,7 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   { Label function;
     __ test(edi, Operand(edi));
     __ j(not_zero, &function, taken);
-    __ xor_(ebx, Operand(ebx));
+    __ Set(ebx, Immediate(0));
     __ GetBuiltinEntry(edx, Builtins::CALL_NON_FUNCTION);
     __ jmp(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
            RelocInfo::CODE_TARGET);

deps/v8/src/ia32/code-stubs-ia32.cc

@@ -104,7 +104,7 @@ void FastNewContextStub::Generate(MacroAssembler* masm) {
          Immediate(Smi::FromInt(length)));
 
   // Setup the fixed slots.
-  __ xor_(ebx, Operand(ebx));  // Set to NULL.
+  __ Set(ebx, Immediate(0));  // Set to NULL.
   __ mov(Operand(eax, Context::SlotOffset(Context::CLOSURE_INDEX)), ecx);
   __ mov(Operand(eax, Context::SlotOffset(Context::FCONTEXT_INDEX)), eax);
   __ mov(Operand(eax, Context::SlotOffset(Context::PREVIOUS_INDEX)), ebx);
@@ -1772,7 +1772,6 @@ void TypeRecordingBinaryOpStub::GenerateSmiStub(MacroAssembler* masm) {
 }
 
 
-
 void TypeRecordingBinaryOpStub::GenerateStringStub(MacroAssembler* masm) {
   Label call_runtime;
   ASSERT(operands_type_ == TRBinaryOpIC::STRING);
@@ -2016,8 +2015,7 @@ void TypeRecordingBinaryOpStub::GenerateInt32Stub(MacroAssembler* masm) {
 
 void TypeRecordingBinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
   Label call_runtime;
-  ASSERT(operands_type_ == TRBinaryOpIC::HEAP_NUMBER ||
-         operands_type_ == TRBinaryOpIC::INT32);
+  ASSERT(operands_type_ == TRBinaryOpIC::HEAP_NUMBER);
 
   // Floating point case.
   switch (op_) {
@@ -4303,7 +4301,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
       // that contains the exponent and high bit of the mantissa.
       STATIC_ASSERT(((kQuietNaNHighBitsMask << 1) & 0x80000000u) != 0);
       __ mov(edx, FieldOperand(edx, HeapNumber::kExponentOffset));
-      __ xor_(eax, Operand(eax));
+      __ Set(eax, Immediate(0));
       // Shift value and mask so kQuietNaNHighBitsMask applies to topmost
       // bits.
       __ add(edx, Operand(edx));
@@ -4433,7 +4431,7 @@ void CompareStub::Generate(MacroAssembler* masm) {
       __ j(below, &below_label, not_taken);
       __ j(above, &above_label, not_taken);
 
-      __ xor_(eax, Operand(eax));
+      __ Set(eax, Immediate(0));
       __ ret(0);
 
       __ bind(&below_label);
@@ -4646,7 +4644,7 @@ void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) {
   // Before returning we restore the context from the frame pointer if
   // not NULL.  The frame pointer is NULL in the exception handler of
   // a JS entry frame.
-  __ xor_(esi, Operand(esi));  // Tentatively set context pointer to NULL.
+  __ Set(esi, Immediate(0));  // Tentatively set context pointer to NULL.
   NearLabel skip;
   __ cmp(ebp, 0);
   __ j(equal, &skip, not_taken);
@@ -4799,7 +4797,7 @@ void CEntryStub::GenerateThrowUncatchable(MacroAssembler* masm,
   }
 
   // Clear the context pointer.
-  __ xor_(esi, Operand(esi));
+  __ Set(esi, Immediate(0));
 
   // Restore fp from handler and discard handler state.
   STATIC_ASSERT(StackHandlerConstants::kFPOffset == 1 * kPointerSize);
@@ -4973,7 +4971,26 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
 }
 
 
+// Generate stub code for instanceof.
+// This code can patch a call site inlined cache of the instance of check,
+// which looks like this.
+//
+//   81 ff XX XX XX XX   cmp    edi, <the hole, patched to a map>
+//   75 0a               jne    <some near label>
+//   b8 XX XX XX XX      mov    eax, <the hole, patched to either true or false>
+//
+// If call site patching is requested the stack will have the delta from the
+// return address to the cmp instruction just below the return address. This
+// also means that call site patching can only take place with arguments in
+// registers. TOS looks like this when call site patching is requested
+//
+//   esp[0] : return address
+//   esp[4] : delta from return address to cmp instruction
+//
 void InstanceofStub::Generate(MacroAssembler* masm) {
+  // Call site inlining and patching implies arguments in registers.
+  ASSERT(HasArgsInRegisters() || !HasCallSiteInlineCheck());
+
   // Fixed register usage throughout the stub.
   Register object = eax;  // Object (lhs).
   Register map = ebx;  // Map of the object.
@@ -4981,9 +4998,22 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   Register prototype = edi;  // Prototype of the function.
   Register scratch = ecx;
 
+  // Constants describing the call site code to patch.
+  static const int kDeltaToCmpImmediate = 2;
+  static const int kDeltaToMov = 8;
+  static const int kDeltaToMovImmediate = 9;
+  static const int8_t kCmpEdiImmediateByte1 = BitCast<int8_t, uint8_t>(0x81);
+  static const int8_t kCmpEdiImmediateByte2 = BitCast<int8_t, uint8_t>(0xff);
+  static const int8_t kMovEaxImmediateByte = BitCast<int8_t, uint8_t>(0xb8);
+
+  ExternalReference roots_address = ExternalReference::roots_address();
+
+  ASSERT_EQ(object.code(), InstanceofStub::left().code());
+  ASSERT_EQ(function.code(), InstanceofStub::right().code());
+
   // Get the object and function - they are always both needed.
   Label slow, not_js_object;
-  if (!args_in_registers()) {
+  if (!HasArgsInRegisters()) {
     __ mov(object, Operand(esp, 2 * kPointerSize));
     __ mov(function, Operand(esp, 1 * kPointerSize));
   }
@@ -4993,22 +5023,26 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   __ j(zero, &not_js_object, not_taken);
   __ IsObjectJSObjectType(object, map, scratch, &not_js_object);
 
-  // Look up the function and the map in the instanceof cache.
-  NearLabel miss;
-  ExternalReference roots_address = ExternalReference::roots_address();
-  __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex));
-  __ cmp(function,
-         Operand::StaticArray(scratch, times_pointer_size, roots_address));
-  __ j(not_equal, &miss);
-  __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex));
-  __ cmp(map, Operand::StaticArray(scratch, times_pointer_size, roots_address));
-  __ j(not_equal, &miss);
-  __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
-  __ mov(eax, Operand::StaticArray(scratch, times_pointer_size, roots_address));
-  __ IncrementCounter(&Counters::instance_of_cache, 1);
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  // If there is a call site cache don't look in the global cache, but do the
+  // real lookup and update the call site cache.
+  if (!HasCallSiteInlineCheck()) {
+    // Look up the function and the map in the instanceof cache.
+    NearLabel miss;
+    __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex));
+    __ cmp(function,
+           Operand::StaticArray(scratch, times_pointer_size, roots_address));
+    __ j(not_equal, &miss);
+    __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex));
+    __ cmp(map, Operand::StaticArray(
+        scratch, times_pointer_size, roots_address));
+    __ j(not_equal, &miss);
+    __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
+    __ mov(eax, Operand::StaticArray(
+        scratch, times_pointer_size, roots_address));
+    __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
+    __ bind(&miss);
+  }
 
-  __ bind(&miss);
   // Get the prototype of the function.
   __ TryGetFunctionPrototype(function, prototype, scratch, &slow);
 
@@ -5017,13 +5051,29 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   __ j(zero, &slow, not_taken);
   __ IsObjectJSObjectType(prototype, scratch, scratch, &slow);
 
-  // Update the golbal instanceof cache with the current map and function. The
-  // cached answer will be set when it is known.
+  // Update the global instanceof or call site inlined cache with the current
+  // map and function. The cached answer will be set when it is known below.
+  if (!HasCallSiteInlineCheck()) {
   __ mov(scratch, Immediate(Heap::kInstanceofCacheMapRootIndex));
   __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), map);
   __ mov(scratch, Immediate(Heap::kInstanceofCacheFunctionRootIndex));
   __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address),
          function);
+  } else {
+    // The constants for the code patching are based on no push instructions
+    // at the call site.
+    ASSERT(HasArgsInRegisters());
+    // Get return address and delta to inlined map check.
+    __ mov(scratch, Operand(esp, 0 * kPointerSize));
+    __ sub(scratch, Operand(esp, 1 * kPointerSize));
+    if (FLAG_debug_code) {
+      __ cmpb(Operand(scratch, 0), kCmpEdiImmediateByte1);
+      __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 1)");
+      __ cmpb(Operand(scratch, 1), kCmpEdiImmediateByte2);
+      __ Assert(equal, "InstanceofStub unexpected call site cache (cmp 2)");
+    }
+    __ mov(Operand(scratch, kDeltaToCmpImmediate), map);
+  }
 
   // Loop through the prototype chain of the object looking for the function
   // prototype.
@@ -5039,18 +5089,48 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   __ jmp(&loop);
 
   __ bind(&is_instance);
-  __ IncrementCounter(&Counters::instance_of_stub_true, 1);
-  __ Set(eax, Immediate(0));
-  __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
-  __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), eax);
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  if (!HasCallSiteInlineCheck()) {
+    __ Set(eax, Immediate(0));
+    __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
+    __ mov(Operand::StaticArray(scratch,
+                                times_pointer_size, roots_address), eax);
+  } else {
+    // Get return address and delta to inlined map check.
+    __ mov(eax, Factory::true_value());
+    __ mov(scratch, Operand(esp, 0 * kPointerSize));
+    __ sub(scratch, Operand(esp, 1 * kPointerSize));
+    if (FLAG_debug_code) {
+      __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte);
+      __ Assert(equal, "InstanceofStub unexpected call site cache (mov)");
+    }
+    __ mov(Operand(scratch, kDeltaToMovImmediate), eax);
+    if (!ReturnTrueFalseObject()) {
+      __ Set(eax, Immediate(0));
+    }
+  }
+  __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
 
   __ bind(&is_not_instance);
-  __ IncrementCounter(&Counters::instance_of_stub_false, 1);
-  __ Set(eax, Immediate(Smi::FromInt(1)));
-  __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
-  __ mov(Operand::StaticArray(scratch, times_pointer_size, roots_address), eax);
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  if (!HasCallSiteInlineCheck()) {
+    __ Set(eax, Immediate(Smi::FromInt(1)));
+    __ mov(scratch, Immediate(Heap::kInstanceofCacheAnswerRootIndex));
+    __ mov(Operand::StaticArray(
+        scratch, times_pointer_size, roots_address), eax);
+  } else {
+    // Get return address and delta to inlined map check.
+    __ mov(eax, Factory::false_value());
+    __ mov(scratch, Operand(esp, 0 * kPointerSize));
+    __ sub(scratch, Operand(esp, 1 * kPointerSize));
+    if (FLAG_debug_code) {
+      __ cmpb(Operand(scratch, kDeltaToMov), kMovEaxImmediateByte);
+      __ Assert(equal, "InstanceofStub unexpected call site cache (mov)");
+    }
+    __ mov(Operand(scratch, kDeltaToMovImmediate), eax);
+    if (!ReturnTrueFalseObject()) {
+      __ Set(eax, Immediate(Smi::FromInt(1)));
+    }
+  }
+  __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
 
   Label object_not_null, object_not_null_or_smi;
   __ bind(&not_js_object);
@@ -5064,39 +5144,61 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
   // Null is not instance of anything.
   __ cmp(object, Factory::null_value());
   __ j(not_equal, &object_not_null);
-  __ IncrementCounter(&Counters::instance_of_stub_false_null, 1);
   __ Set(eax, Immediate(Smi::FromInt(1)));
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
 
   __ bind(&object_not_null);
   // Smi values is not instance of anything.
   __ test(object, Immediate(kSmiTagMask));
   __ j(not_zero, &object_not_null_or_smi, not_taken);
   __ Set(eax, Immediate(Smi::FromInt(1)));
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
 
   __ bind(&object_not_null_or_smi);
   // String values is not instance of anything.
   Condition is_string = masm->IsObjectStringType(object, scratch, scratch);
   __ j(NegateCondition(is_string), &slow);
-  __ IncrementCounter(&Counters::instance_of_stub_false_string, 1);
   __ Set(eax, Immediate(Smi::FromInt(1)));
-  __ ret((args_in_registers() ? 0 : 2) * kPointerSize);
+  __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
 
   // Slow-case: Go through the JavaScript implementation.
   __ bind(&slow);
-  if (args_in_registers()) {
-    // Push arguments below return address.
-    __ pop(scratch);
+  if (!ReturnTrueFalseObject()) {
+    // Tail call the builtin which returns 0 or 1.
+    if (HasArgsInRegisters()) {
+      // Push arguments below return address.
+      __ pop(scratch);
+      __ push(object);
+      __ push(function);
+      __ push(scratch);
+    }
+    __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION);
+  } else {
+    // Call the builtin and convert 0/1 to true/false.
+    __ EnterInternalFrame();
     __ push(object);
     __ push(function);
-    __ push(scratch);
+    __ InvokeBuiltin(Builtins::INSTANCE_OF, CALL_FUNCTION);
+    __ LeaveInternalFrame();
+    NearLabel true_value, done;
+    __ test(eax, Operand(eax));
+    __ j(zero, &true_value);
+    __ mov(eax, Factory::false_value());
+    __ jmp(&done);
+    __ bind(&true_value);
+    __ mov(eax, Factory::true_value());
+    __ bind(&done);
+    __ ret((HasArgsInRegisters() ? 0 : 2) * kPointerSize);
   }
-  __ IncrementCounter(&Counters::instance_of_slow, 1);
-  __ InvokeBuiltin(Builtins::INSTANCE_OF, JUMP_FUNCTION);
 }
 
 
+Register InstanceofStub::left() { return eax; }
+
+
+Register InstanceofStub::right() { return edx; }
+
+
 int CompareStub::MinorKey() {
   // Encode the three parameters in a unique 16 bit value. To avoid duplicate
   // stubs the never NaN NaN condition is only taken into account if the

deps/v8/src/ia32/code-stubs-ia32.h

@@ -250,13 +250,6 @@ class TypeRecordingBinaryOpStub: public CodeStub {
         result_type_(result_type),
         name_(NULL) { }
 
-  // Generate code to call the stub with the supplied arguments. This will add
-  // code at the call site to prepare arguments either in registers or on the
-  // stack together with the actual call.
-  void GenerateCall(MacroAssembler* masm, Register left, Register right);
-  void GenerateCall(MacroAssembler* masm, Register left, Smi* right);
-  void GenerateCall(MacroAssembler* masm, Smi* left, Register right);
-
  private:
   enum SmiCodeGenerateHeapNumberResults {
     ALLOW_HEAPNUMBER_RESULTS,
@@ -321,10 +314,6 @@ class TypeRecordingBinaryOpStub: public CodeStub {
   void GenerateTypeTransition(MacroAssembler* masm);
   void GenerateTypeTransitionWithSavedArgs(MacroAssembler* masm);
 
-  bool IsOperationCommutative() {
-    return (op_ == Token::ADD) || (op_ == Token::MUL);
-  }
-
   virtual int GetCodeKind() { return Code::TYPE_RECORDING_BINARY_OP_IC; }
 
   virtual InlineCacheState GetICState() {

deps/v8/src/ia32/codegen-ia32.cc

@@ -745,10 +745,10 @@ Result CodeGenerator::StoreArgumentsObject(bool initial) {
 
   Comment cmnt(masm_, "[ store arguments object");
   if (mode == LAZY_ARGUMENTS_ALLOCATION && initial) {
-    // When using lazy arguments allocation, we store the hole value
+    // When using lazy arguments allocation, we store the arguments marker value
     // as a sentinel indicating that the arguments object hasn't been
     // allocated yet.
-    frame_->Push(Factory::the_hole_value());
+    frame_->Push(Factory::arguments_marker());
   } else {
     ArgumentsAccessStub stub(ArgumentsAccessStub::NEW_OBJECT);
     frame_->PushFunction();
@@ -773,9 +773,9 @@ Result CodeGenerator::StoreArgumentsObject(bool initial) {
     if (probe.is_constant()) {
       // We have to skip updating the arguments object if it has
       // been assigned a proper value.
-      skip_arguments = !probe.handle()->IsTheHole();
+      skip_arguments = !probe.handle()->IsArgumentsMarker();
     } else {
-      __ cmp(Operand(probe.reg()), Immediate(Factory::the_hole_value()));
+      __ cmp(Operand(probe.reg()), Immediate(Factory::arguments_marker()));
       probe.Unuse();
       done.Branch(not_equal);
     }
@@ -3294,9 +3294,9 @@ void CodeGenerator::CallApplyLazy(Expression* applicand,
     Label slow, done;
     bool try_lazy = true;
     if (probe.is_constant()) {
-      try_lazy = probe.handle()->IsTheHole();
+      try_lazy = probe.handle()->IsArgumentsMarker();
     } else {
-      __ cmp(Operand(probe.reg()), Immediate(Factory::the_hole_value()));
+      __ cmp(Operand(probe.reg()), Immediate(Factory::arguments_marker()));
       probe.Unuse();
       __ j(not_equal, &slow);
     }
@@ -5068,7 +5068,7 @@ void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot,
   // object has been lazily loaded yet.
   Result result = frame()->Pop();
   if (result.is_constant()) {
-    if (result.handle()->IsTheHole()) {
+    if (result.handle()->IsArgumentsMarker()) {
       result = StoreArgumentsObject(false);
     }
     frame()->Push(&result);
@@ -5079,7 +5079,7 @@ void CodeGenerator::LoadFromSlotCheckForArguments(Slot* slot,
   // indicates that we haven't loaded the arguments object yet, we
   // need to do it now.
   JumpTarget exit;
-  __ cmp(Operand(result.reg()), Immediate(Factory::the_hole_value()));
+  __ cmp(Operand(result.reg()), Immediate(Factory::arguments_marker()));
   frame()->Push(&result);
   exit.Branch(not_equal);
 
@@ -6649,38 +6649,41 @@ void CodeGenerator::GenerateIsArray(ZoneList<Expression*>* args) {
 
 
 void CodeGenerator::GenerateFastAsciiArrayJoin(ZoneList<Expression*>* args) {
+  Label bailout, done, one_char_separator, long_separator,
+      non_trivial_array, not_size_one_array, loop, loop_condition,
+      loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry;
+
   ASSERT(args->length() == 2);
+  // We will leave the separator on the stack until the end of the function.
   Load(args->at(1));
+  // Load this to eax (= array)
   Load(args->at(0));
   Result array_result = frame_->Pop();
   array_result.ToRegister(eax);
   frame_->SpillAll();
 
-  Label bailout;
-  Label done;
   // All aliases of the same register have disjoint lifetimes.
   Register array = eax;
-  Register result_pos = no_reg;
+  Register elements = no_reg;  // Will be eax.
 
-  Register index = edi;
+  Register index = edx;
 
-  Register current_string_length = ecx;  // Will be ecx when live.
+  Register string_length = ecx;
 
-  Register current_string = edx;
+  Register string = esi;
 
   Register scratch = ebx;
 
-  Register scratch_2 = esi;
-  Register new_padding_chars = scratch_2;
-
-  Operand separator = Operand(esp, 4 * kPointerSize);  // Already pushed.
-  Operand elements = Operand(esp, 3 * kPointerSize);
-  Operand result = Operand(esp, 2 * kPointerSize);
-  Operand padding_chars = Operand(esp, 1 * kPointerSize);
-  Operand array_length = Operand(esp, 0);
-  __ sub(Operand(esp), Immediate(4 * kPointerSize));
+  Register array_length = edi;
+  Register result_pos = no_reg;  // Will be edi.
 
-  // Check that eax is a JSArray
+  // Separator operand is already pushed.
+  Operand separator_operand = Operand(esp, 2 * kPointerSize);
+  Operand result_operand = Operand(esp, 1 * kPointerSize);
+  Operand array_length_operand = Operand(esp, 0);
+  __ sub(Operand(esp), Immediate(2 * kPointerSize));
+  __ cld();
+  // Check that the array is a JSArray
   __ test(array, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
   __ CmpObjectType(array, JS_ARRAY_TYPE, scratch);
@@ -6691,140 +6694,226 @@ void CodeGenerator::GenerateFastAsciiArrayJoin(ZoneList<Expression*>* args) {
             1 << Map::kHasFastElements);
   __ j(zero, &bailout);
 
-  // If the array is empty, return the empty string.
-  __ mov(scratch, FieldOperand(array, JSArray::kLengthOffset));
-  __ sar(scratch, 1);
-  Label non_trivial;
-  __ j(not_zero, &non_trivial);
-  __ mov(result, Factory::empty_string());
+  // If the array has length zero, return the empty string.
+  __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset));
+  __ sar(array_length, 1);
+  __ j(not_zero, &non_trivial_array);
+  __ mov(result_operand, Factory::empty_string());
   __ jmp(&done);
 
-  __ bind(&non_trivial);
-  __ mov(array_length, scratch);
-
-  __ mov(scratch, FieldOperand(array, JSArray::kElementsOffset));
-  __ mov(elements, scratch);
+  // Save the array length.
+  __ bind(&non_trivial_array);
+  __ mov(array_length_operand, array_length);
 
+  // Save the FixedArray containing array's elements.
   // End of array's live range.
-  result_pos = array;
+  elements = array;
+  __ mov(elements, FieldOperand(array, JSArray::kElementsOffset));
   array = no_reg;
 
 
-  // Check that the separator is a flat ascii string.
-  __ mov(current_string, separator);
-  __ test(current_string, Immediate(kSmiTagMask));
+  // Check that all array elements are sequential ASCII strings, and
+  // accumulate the sum of their lengths, as a smi-encoded value.
+  __ Set(index, Immediate(0));
+  __ Set(string_length, Immediate(0));
+  // Loop condition: while (index < length).
+  // Live loop registers: index, array_length, string,
+  //                      scratch, string_length, elements.
+  __ jmp(&loop_condition);
+  __ bind(&loop);
+  __ cmp(index, Operand(array_length));
+  __ j(greater_equal, &done);
+
+  __ mov(string, FieldOperand(elements, index,
+                                      times_pointer_size,
+                                      FixedArray::kHeaderSize));
+  __ test(string, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
+  __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
+  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
   __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
   __ j(not_equal, &bailout);
-  // If the separator is the empty string, replace it with NULL.
-  // The test for NULL is quicker than the empty string test, in a loop.
-  __ cmp(FieldOperand(current_string, SeqAsciiString::kLengthOffset),
-         Immediate(0));
-  Label separator_checked;
-  __ j(not_zero, &separator_checked);
-  __ mov(separator, Immediate(0));
-  __ bind(&separator_checked);
-
-  // Check that elements[0] is a flat ascii string, and copy it in new space.
-  __ mov(scratch, elements);
-  __ mov(current_string, FieldOperand(scratch, FixedArray::kHeaderSize));
-  __ test(current_string, Immediate(kSmiTagMask));
+  __ add(string_length,
+         FieldOperand(string, SeqAsciiString::kLengthOffset));
+  __ j(overflow, &bailout);
+  __ add(Operand(index), Immediate(1));
+  __ bind(&loop_condition);
+  __ cmp(index, Operand(array_length));
+  __ j(less, &loop);
+
+  // If array_length is 1, return elements[0], a string.
+  __ cmp(array_length, 1);
+  __ j(not_equal, &not_size_one_array);
+  __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize));
+  __ mov(result_operand, scratch);
+  __ jmp(&done);
+
+  __ bind(&not_size_one_array);
+
+  // End of array_length live range.
+  result_pos = array_length;
+  array_length = no_reg;
+
+  // Live registers:
+  // string_length: Sum of string lengths, as a smi.
+  // elements: FixedArray of strings.
+
+  // Check that the separator is a flat ASCII string.
+  __ mov(string, separator_operand);
+  __ test(string, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
+  __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
+  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
   __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
   __ j(not_equal, &bailout);
 
-  // Allocate space to copy it.  Round up the size to the alignment granularity.
-  __ mov(current_string_length,
-         FieldOperand(current_string, String::kLengthOffset));
-  __ shr(current_string_length, 1);
-
+  // Add (separator length times array_length) - separator length
+  // to string_length.
+  __ mov(scratch, separator_operand);
+  __ mov(scratch, FieldOperand(scratch, SeqAsciiString::kLengthOffset));
+  __ sub(string_length, Operand(scratch));  // May be negative, temporarily.
+  __ imul(scratch, array_length_operand);
+  __ j(overflow, &bailout);
+  __ add(string_length, Operand(scratch));
+  __ j(overflow, &bailout);
+
+  __ shr(string_length, 1);
   // Live registers and stack values:
-  //   current_string_length: length of elements[0].
-
-  // New string result in new space = elements[0]
-  __ AllocateAsciiString(result_pos, current_string_length, scratch_2,
-                         index, no_reg, &bailout);
-  __ mov(result, result_pos);
-
-  // Adjust current_string_length to include padding bytes at end of string.
-  // Keep track of the number of padding bytes.
-  __ mov(new_padding_chars, current_string_length);
-  __ add(Operand(current_string_length), Immediate(kObjectAlignmentMask));
-  __ and_(Operand(current_string_length), Immediate(~kObjectAlignmentMask));
-  __ sub(new_padding_chars, Operand(current_string_length));
-  __ neg(new_padding_chars);
-  __ mov(padding_chars, new_padding_chars);
-
-  Label copy_loop_1_done;
-  Label copy_loop_1;
-  __ test(current_string_length, Operand(current_string_length));
-  __ j(zero, &copy_loop_1_done);
-  __ bind(&copy_loop_1);
-  __ sub(Operand(current_string_length), Immediate(kPointerSize));
-  __ mov(scratch, FieldOperand(current_string, current_string_length,
-                               times_1, SeqAsciiString::kHeaderSize));
-  __ mov(FieldOperand(result_pos, current_string_length,
-                      times_1, SeqAsciiString::kHeaderSize),
-         scratch);
-  __ j(not_zero, &copy_loop_1);
-  __ bind(&copy_loop_1_done);
-
-  __ mov(index, Immediate(1));
+  //   string_length
+  //   elements
+  __ AllocateAsciiString(result_pos, string_length, scratch,
+                         index, string, &bailout);
+  __ mov(result_operand, result_pos);
+  __ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize));
+
+
+  __ mov(string, separator_operand);
+  __ cmp(FieldOperand(string, SeqAsciiString::kLengthOffset),
+         Immediate(Smi::FromInt(1)));
+  __ j(equal, &one_char_separator);
+  __ j(greater, &long_separator);
+
+
+  // Empty separator case
+  __ mov(index, Immediate(0));
+  __ jmp(&loop_1_condition);
   // Loop condition: while (index < length).
-  Label loop;
-  __ bind(&loop);
-  __ cmp(index, array_length);
-  __ j(greater_equal, &done);
+  __ bind(&loop_1);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+  //   elements: the FixedArray of strings we are joining.
+
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+  __ add(Operand(index), Immediate(1));
+  __ bind(&loop_1_condition);
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_1);  // End while (index < length).
+  __ jmp(&done);
 
-  // If the separator is the empty string, signalled by NULL, skip it.
-  Label separator_done;
-  __ mov(current_string, separator);
-  __ test(current_string, Operand(current_string));
-  __ j(zero, &separator_done);
-
-  // Append separator to result.  It is known to be a flat ascii string.
-  __ AppendStringToTopOfNewSpace(current_string, current_string_length,
-                                 result_pos, scratch, scratch_2, result,
-                                 padding_chars, &bailout);
-  __ bind(&separator_done);
-
-  // Add next element of array to the end of the result.
-  // Get current_string = array[index].
-  __ mov(scratch, elements);
-  __ mov(current_string, FieldOperand(scratch, index,
-                                      times_pointer_size,
-                                      FixedArray::kHeaderSize));
-  // If current != flat ascii string drop result, return undefined.
-  __ test(current_string, Immediate(kSmiTagMask));
-  __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
-  __ and_(scratch, Immediate(
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
-  __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
-  __ j(not_equal, &bailout);
 
-  // Append current to the result.
-  __ AppendStringToTopOfNewSpace(current_string, current_string_length,
-                                 result_pos, scratch, scratch_2, result,
-                                 padding_chars, &bailout);
+
+  // One-character separator case
+  __ bind(&one_char_separator);
+  // Replace separator with its ascii character value.
+  __ mov_b(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ mov_b(separator_operand, scratch);
+
+  __ Set(index, Immediate(0));
+  // Jump into the loop after the code that copies the separator, so the first
+  // element is not preceded by a separator
+  __ jmp(&loop_2_entry);
+  // Loop condition: while (index < length).
+  __ bind(&loop_2);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+
+  // Copy the separator character to the result.
+  __ mov_b(scratch, separator_operand);
+  __ mov_b(Operand(result_pos, 0), scratch);
+  __ inc(result_pos);
+
+  __ bind(&loop_2_entry);
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
   __ add(Operand(index), Immediate(1));
-  __ jmp(&loop);  // End while (index < length).
+
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_2);  // End while (index < length).
+  __ jmp(&done);
+
+
+  // Long separator case (separator is more than one character).
+  __ bind(&long_separator);
+
+  __ Set(index, Immediate(0));
+  // Jump into the loop after the code that copies the separator, so the first
+  // element is not preceded by a separator
+  __ jmp(&loop_3_entry);
+  // Loop condition: while (index < length).
+  __ bind(&loop_3);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+
+  // Copy the separator to the result.
+  __ mov(string, separator_operand);
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+
+  __ bind(&loop_3_entry);
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+  __ add(Operand(index), Immediate(1));
+
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_3);  // End while (index < length).
+  __ jmp(&done);
+
 
   __ bind(&bailout);
-  __ mov(result, Factory::undefined_value());
+  __ mov(result_operand, Factory::undefined_value());
   __ bind(&done);
-  __ mov(eax, result);
+  __ mov(eax, result_operand);
   // Drop temp values from the stack, and restore context register.
-  __ add(Operand(esp), Immediate(4 * kPointerSize));
+  __ add(Operand(esp), Immediate(2 * kPointerSize));
 
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   frame_->Drop(1);

deps/v8/src/ia32/debug-ia32.cc

@@ -125,7 +125,7 @@ static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
 #ifdef DEBUG
   __ RecordComment("// Calling from debug break to runtime - come in - over");
 #endif
-  __ Set(eax, Immediate(0));  // no arguments
+  __ Set(eax, Immediate(0));  // No arguments.
   __ mov(ebx, Immediate(ExternalReference::debug_break()));
 
   CEntryStub ceb(1);

deps/v8/src/ia32/deoptimizer-ia32.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -27,6 +27,8 @@
 
 #include "v8.h"
 
+#if defined(V8_TARGET_ARCH_IA32)
+
 #include "codegen.h"
 #include "deoptimizer.h"
 #include "full-codegen.h"
@@ -56,8 +58,9 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
   SafepointTable table(function->code());
   for (unsigned i = 0; i < table.length(); i++) {
     unsigned pc_offset = table.GetPcOffset(i);
-    int deoptimization_index = table.GetDeoptimizationIndex(i);
-    int gap_code_size = table.GetGapCodeSize(i);
+    SafepointEntry safepoint_entry = table.GetEntry(i);
+    int deoptimization_index = safepoint_entry.deoptimization_index();
+    int gap_code_size = safepoint_entry.gap_code_size();
 #ifdef DEBUG
     // Destroy the code which is not supposed to run again.
     unsigned instructions = pc_offset - last_pc_offset;
@@ -105,23 +108,25 @@ void Deoptimizer::DeoptimizeFunction(JSFunction* function) {
 
 void Deoptimizer::PatchStackCheckCode(RelocInfo* rinfo,
                                       Code* replacement_code) {
-  // The stack check code matches the pattern (on ia32, for example):
+  // The stack check code matches the pattern:
   //
   //     cmp esp, <limit>
   //     jae ok
   //     call <stack guard>
+  //     test eax, <loop nesting depth>
   // ok: ...
   //
-  // We will patch the code to:
+  // We will patch away the branch so the code is:
   //
   //     cmp esp, <limit>  ;; Not changed
   //     nop
   //     nop
   //     call <on-stack replacment>
+  //     test eax, <loop nesting depth>
   // ok:
   Address call_target_address = rinfo->pc();
   ASSERT(*(call_target_address - 3) == 0x73 &&  // jae
-         *(call_target_address - 2) == 0x05 &&  // offset
+         *(call_target_address - 2) == 0x07 &&  // offset
          *(call_target_address - 1) == 0xe8);   // call
   *(call_target_address - 3) = 0x90;  // nop
   *(call_target_address - 2) = 0x90;  // nop
@@ -130,12 +135,14 @@ void Deoptimizer::PatchStackCheckCode(RelocInfo* rinfo,
 
 
 void Deoptimizer::RevertStackCheckCode(RelocInfo* rinfo, Code* check_code) {
+  // Replace the nops from patching (Deoptimizer::PatchStackCheckCode) to
+  // restore the conditional branch.
   Address call_target_address = rinfo->pc();
   ASSERT(*(call_target_address - 3) == 0x90 &&  // nop
          *(call_target_address - 2) == 0x90 &&  // nop
          *(call_target_address - 1) == 0xe8);   // call
   *(call_target_address - 3) = 0x73;  // jae
-  *(call_target_address - 2) = 0x05;  // offset
+  *(call_target_address - 2) = 0x07;  // offset
   rinfo->set_target_address(check_code->entry());
 }
 
@@ -613,3 +620,5 @@ void Deoptimizer::TableEntryGenerator::GeneratePrologue() {
 
 
 } }  // namespace v8::internal
+
+#endif  // V8_TARGET_ARCH_IA32

deps/v8/src/ia32/disasm-ia32.cc

@@ -1182,15 +1182,33 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
                            NameOfXMMRegister(rm),
                            static_cast<int>(imm8));
             data += 2;
+          } else if (*data == 0xF3) {
+            data++;
+            int mod, regop, rm;
+            get_modrm(*data, &mod, &regop, &rm);
+            AppendToBuffer("psllq %s,%s",
+                           NameOfXMMRegister(regop),
+                           NameOfXMMRegister(rm));
+            data++;
           } else if (*data == 0x73) {
             data++;
             int mod, regop, rm;
             get_modrm(*data, &mod, &regop, &rm);
             int8_t imm8 = static_cast<int8_t>(data[1]);
-            AppendToBuffer("psllq %s,%d",
+            ASSERT(regop == esi || regop == edx);
+            AppendToBuffer("%s %s,%d",
+                           (regop == esi) ? "psllq" : "psrlq",
                            NameOfXMMRegister(rm),
                            static_cast<int>(imm8));
             data += 2;
+          } else if (*data == 0xD3) {
+            data++;
+            int mod, regop, rm;
+            get_modrm(*data, &mod, &regop, &rm);
+            AppendToBuffer("psrlq %s,%s",
+                           NameOfXMMRegister(regop),
+                           NameOfXMMRegister(rm));
+            data++;
           } else if (*data == 0x7F) {
             AppendToBuffer("movdqa ");
             data++;
@@ -1228,6 +1246,14 @@ int DisassemblerIA32::InstructionDecode(v8::internal::Vector<char> out_buffer,
                            NameOfXMMRegister(regop),
                            NameOfXMMRegister(rm));
             data++;
+          } else if (*data == 0xEB) {
+            data++;
+            int mod, regop, rm;
+            get_modrm(*data, &mod, &regop, &rm);
+            AppendToBuffer("por %s,%s",
+                           NameOfXMMRegister(regop),
+                           NameOfXMMRegister(rm));
+            data++;
           } else {
             UnimplementedInstruction();
           }

deps/v8/src/ia32/full-codegen-ia32.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -264,16 +264,24 @@ void FullCodeGenerator::EmitStackCheck(IterationStatement* stmt) {
   __ j(above_equal, &ok, taken);
   StackCheckStub stub;
   __ CallStub(&stub);
-  __ bind(&ok);
-  PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
-  PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);
+  // Record a mapping of this PC offset to the OSR id.  This is used to find
+  // the AST id from the unoptimized code in order to use it as a key into
+  // the deoptimization input data found in the optimized code.
   RecordStackCheck(stmt->OsrEntryId());
-  // Loop stack checks can be patched to perform on-stack
-  // replacement. In order to decide whether or not to perform OSR we
-  // embed the loop depth in a test instruction after the call so we
-  // can extract it from the OSR builtin.
+
+  // Loop stack checks can be patched to perform on-stack replacement. In
+  // order to decide whether or not to perform OSR we embed the loop depth
+  // in a test instruction after the call so we can extract it from the OSR
+  // builtin.
   ASSERT(loop_depth() > 0);
   __ test(eax, Immediate(Min(loop_depth(), Code::kMaxLoopNestingMarker)));
+
+  __ bind(&ok);
+  PrepareForBailoutForId(stmt->EntryId(), NO_REGISTERS);
+  // Record a mapping of the OSR id to this PC.  This is used if the OSR
+  // entry becomes the target of a bailout.  We don't expect it to be, but
+  // we want it to work if it is.
+  PrepareForBailoutForId(stmt->OsrEntryId(), NO_REGISTERS);
 }
 
 
@@ -379,7 +387,7 @@ void FullCodeGenerator::EffectContext::Plug(Handle<Object> lit) const {
 
 void FullCodeGenerator::AccumulatorValueContext::Plug(
     Handle<Object> lit) const {
-  __ mov(result_register(), lit);
+  __ Set(result_register(), Immediate(lit));
 }
 
 
@@ -1497,7 +1505,9 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
       if (expr->is_compound()) {
         if (property->is_arguments_access()) {
           VariableProxy* obj_proxy = property->obj()->AsVariableProxy();
-          __ push(EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx));
+          MemOperand slot_operand =
+              EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx);
+          __ push(slot_operand);
           __ mov(eax, Immediate(property->key()->AsLiteral()->handle()));
         } else {
           VisitForStackValue(property->obj());
@@ -1508,7 +1518,9 @@ void FullCodeGenerator::VisitAssignment(Assignment* expr) {
       } else {
         if (property->is_arguments_access()) {
           VariableProxy* obj_proxy = property->obj()->AsVariableProxy();
-          __ push(EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx));
+          MemOperand slot_operand =
+              EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx);
+          __ push(slot_operand);
           __ push(Immediate(property->key()->AsLiteral()->handle()));
         } else {
           VisitForStackValue(property->obj());
@@ -3339,39 +3351,37 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(ZoneList<Expression*>* args) {
 
 
 void FullCodeGenerator::EmitFastAsciiArrayJoin(ZoneList<Expression*>* args) {
-  Label bailout;
-  Label done;
+  Label bailout, done, one_char_separator, long_separator,
+      non_trivial_array, not_size_one_array, loop, loop_condition,
+      loop_1, loop_1_condition, loop_2, loop_2_entry, loop_3, loop_3_entry;
 
   ASSERT(args->length() == 2);
   // We will leave the separator on the stack until the end of the function.
   VisitForStackValue(args->at(1));
   // Load this to eax (= array)
   VisitForAccumulatorValue(args->at(0));
-
   // All aliases of the same register have disjoint lifetimes.
   Register array = eax;
-  Register result_pos = no_reg;
+  Register elements = no_reg;  // Will be eax.
 
-  Register index = edi;
+  Register index = edx;
 
-  Register current_string_length = ecx;  // Will be ecx when live.
+  Register string_length = ecx;
 
-  Register current_string = edx;
+  Register string = esi;
 
   Register scratch = ebx;
 
-  Register scratch_2 = esi;
-  Register new_padding_chars = scratch_2;
-
-  Operand separator = Operand(esp, 4 * kPointerSize);  // Already pushed.
-  Operand elements = Operand(esp, 3 * kPointerSize);
-  Operand result = Operand(esp, 2 * kPointerSize);
-  Operand padding_chars = Operand(esp, 1 * kPointerSize);
-  Operand array_length = Operand(esp, 0);
-  __ sub(Operand(esp), Immediate(4 * kPointerSize));
+  Register array_length = edi;
+  Register result_pos = no_reg;  // Will be edi.
 
-
-  // Check that eax is a JSArray
+  // Separator operand is already pushed.
+  Operand separator_operand = Operand(esp, 2 * kPointerSize);
+  Operand result_operand = Operand(esp, 1 * kPointerSize);
+  Operand array_length_operand = Operand(esp, 0);
+  __ sub(Operand(esp), Immediate(2 * kPointerSize));
+  __ cld();
+  // Check that the array is a JSArray
   __ test(array, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
   __ CmpObjectType(array, JS_ARRAY_TYPE, scratch);
@@ -3382,140 +3392,226 @@ void FullCodeGenerator::EmitFastAsciiArrayJoin(ZoneList<Expression*>* args) {
             1 << Map::kHasFastElements);
   __ j(zero, &bailout);
 
-  // If the array is empty, return the empty string.
-  __ mov(scratch, FieldOperand(array, JSArray::kLengthOffset));
-  __ sar(scratch, 1);
-  Label non_trivial;
-  __ j(not_zero, &non_trivial);
-  __ mov(result, Factory::empty_string());
+  // If the array has length zero, return the empty string.
+  __ mov(array_length, FieldOperand(array, JSArray::kLengthOffset));
+  __ sar(array_length, 1);
+  __ j(not_zero, &non_trivial_array);
+  __ mov(result_operand, Factory::empty_string());
   __ jmp(&done);
 
-  __ bind(&non_trivial);
-  __ mov(array_length, scratch);
-
-  __ mov(scratch, FieldOperand(array, JSArray::kElementsOffset));
-  __ mov(elements, scratch);
+  // Save the array length.
+  __ bind(&non_trivial_array);
+  __ mov(array_length_operand, array_length);
 
+  // Save the FixedArray containing array's elements.
   // End of array's live range.
-  result_pos = array;
+  elements = array;
+  __ mov(elements, FieldOperand(array, JSArray::kElementsOffset));
   array = no_reg;
 
 
-  // Check that the separator is a flat ascii string.
-  __ mov(current_string, separator);
-  __ test(current_string, Immediate(kSmiTagMask));
+  // Check that all array elements are sequential ASCII strings, and
+  // accumulate the sum of their lengths, as a smi-encoded value.
+  __ Set(index, Immediate(0));
+  __ Set(string_length, Immediate(0));
+  // Loop condition: while (index < length).
+  // Live loop registers: index, array_length, string,
+  //                      scratch, string_length, elements.
+  __ jmp(&loop_condition);
+  __ bind(&loop);
+  __ cmp(index, Operand(array_length));
+  __ j(greater_equal, &done);
+
+  __ mov(string, FieldOperand(elements, index,
+                                      times_pointer_size,
+                                      FixedArray::kHeaderSize));
+  __ test(string, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
+  __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
+  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
   __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
   __ j(not_equal, &bailout);
-  // If the separator is the empty string, replace it with NULL.
-  // The test for NULL is quicker than the empty string test, in a loop.
-  __ cmp(FieldOperand(current_string, SeqAsciiString::kLengthOffset),
-         Immediate(0));
-  Label separator_checked;
-  __ j(not_zero, &separator_checked);
-  __ mov(separator, Immediate(0));
-  __ bind(&separator_checked);
-
-  // Check that elements[0] is a flat ascii string, and copy it in new space.
-  __ mov(scratch, elements);
-  __ mov(current_string, FieldOperand(scratch, FixedArray::kHeaderSize));
-  __ test(current_string, Immediate(kSmiTagMask));
+  __ add(string_length,
+         FieldOperand(string, SeqAsciiString::kLengthOffset));
+  __ j(overflow, &bailout);
+  __ add(Operand(index), Immediate(1));
+  __ bind(&loop_condition);
+  __ cmp(index, Operand(array_length));
+  __ j(less, &loop);
+
+  // If array_length is 1, return elements[0], a string.
+  __ cmp(array_length, 1);
+  __ j(not_equal, &not_size_one_array);
+  __ mov(scratch, FieldOperand(elements, FixedArray::kHeaderSize));
+  __ mov(result_operand, scratch);
+  __ jmp(&done);
+
+  __ bind(&not_size_one_array);
+
+  // End of array_length live range.
+  result_pos = array_length;
+  array_length = no_reg;
+
+  // Live registers:
+  // string_length: Sum of string lengths, as a smi.
+  // elements: FixedArray of strings.
+
+  // Check that the separator is a flat ASCII string.
+  __ mov(string, separator_operand);
+  __ test(string, Immediate(kSmiTagMask));
   __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
+  __ mov(scratch, FieldOperand(string, HeapObject::kMapOffset));
+  __ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
   __ and_(scratch, Immediate(
       kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
   __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
   __ j(not_equal, &bailout);
 
-  // Allocate space to copy it.  Round up the size to the alignment granularity.
-  __ mov(current_string_length,
-         FieldOperand(current_string, String::kLengthOffset));
-  __ shr(current_string_length, 1);
-
+  // Add (separator length times array_length) - separator length
+  // to string_length.
+  __ mov(scratch, separator_operand);
+  __ mov(scratch, FieldOperand(scratch, SeqAsciiString::kLengthOffset));
+  __ sub(string_length, Operand(scratch));  // May be negative, temporarily.
+  __ imul(scratch, array_length_operand);
+  __ j(overflow, &bailout);
+  __ add(string_length, Operand(scratch));
+  __ j(overflow, &bailout);
+
+  __ shr(string_length, 1);
   // Live registers and stack values:
-  //   current_string_length: length of elements[0].
-
-  // New string result in new space = elements[0]
-  __ AllocateAsciiString(result_pos, current_string_length, scratch_2,
-                         index, no_reg, &bailout);
-  __ mov(result, result_pos);
-
-  // Adjust current_string_length to include padding bytes at end of string.
-  // Keep track of the number of padding bytes.
-  __ mov(new_padding_chars, current_string_length);
-  __ add(Operand(current_string_length), Immediate(kObjectAlignmentMask));
-  __ and_(Operand(current_string_length), Immediate(~kObjectAlignmentMask));
-  __ sub(new_padding_chars, Operand(current_string_length));
-  __ neg(new_padding_chars);
-  __ mov(padding_chars, new_padding_chars);
-
-  Label copy_loop_1_done;
-  Label copy_loop_1;
-  __ test(current_string_length, Operand(current_string_length));
-  __ j(zero, &copy_loop_1_done);
-  __ bind(&copy_loop_1);
-  __ sub(Operand(current_string_length), Immediate(kPointerSize));
-  __ mov(scratch, FieldOperand(current_string, current_string_length,
-                               times_1, SeqAsciiString::kHeaderSize));
-  __ mov(FieldOperand(result_pos, current_string_length,
-                      times_1, SeqAsciiString::kHeaderSize),
-         scratch);
-  __ j(not_zero, &copy_loop_1);
-  __ bind(&copy_loop_1_done);
-
-  __ mov(index, Immediate(1));
+  //   string_length
+  //   elements
+  __ AllocateAsciiString(result_pos, string_length, scratch,
+                         index, string, &bailout);
+  __ mov(result_operand, result_pos);
+  __ lea(result_pos, FieldOperand(result_pos, SeqAsciiString::kHeaderSize));
+
+
+  __ mov(string, separator_operand);
+  __ cmp(FieldOperand(string, SeqAsciiString::kLengthOffset),
+         Immediate(Smi::FromInt(1)));
+  __ j(equal, &one_char_separator);
+  __ j(greater, &long_separator);
+
+
+  // Empty separator case
+  __ mov(index, Immediate(0));
+  __ jmp(&loop_1_condition);
   // Loop condition: while (index < length).
-  Label loop;
-  __ bind(&loop);
-  __ cmp(index, array_length);
-  __ j(greater_equal, &done);
+  __ bind(&loop_1);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+  //   elements: the FixedArray of strings we are joining.
+
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+  __ add(Operand(index), Immediate(1));
+  __ bind(&loop_1_condition);
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_1);  // End while (index < length).
+  __ jmp(&done);
+
 
-  // If the separator is the empty string, signalled by NULL, skip it.
-  Label separator_done;
-  __ mov(current_string, separator);
-  __ test(current_string, Operand(current_string));
-  __ j(zero, &separator_done);
-
-  // Append separator to result.  It is known to be a flat ascii string.
-  __ AppendStringToTopOfNewSpace(current_string, current_string_length,
-                                 result_pos, scratch, scratch_2, result,
-                                 padding_chars, &bailout);
-  __ bind(&separator_done);
-
-  // Add next element of array to the end of the result.
-  // Get current_string = array[index].
-  __ mov(scratch, elements);
-  __ mov(current_string, FieldOperand(scratch, index,
-                                      times_pointer_size,
-                                      FixedArray::kHeaderSize));
-  // If current != flat ascii string drop result, return undefined.
-  __ test(current_string, Immediate(kSmiTagMask));
-  __ j(zero, &bailout);
-  __ mov(scratch, FieldOperand(current_string, HeapObject::kMapOffset));
-  __ mov_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
-  __ and_(scratch, Immediate(
-      kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask));
-  __ cmp(scratch, kStringTag | kAsciiStringTag | kSeqStringTag);
-  __ j(not_equal, &bailout);
 
-  // Append current to the result.
-  __ AppendStringToTopOfNewSpace(current_string, current_string_length,
-                                 result_pos, scratch, scratch_2, result,
-                                 padding_chars, &bailout);
+  // One-character separator case
+  __ bind(&one_char_separator);
+  // Replace separator with its ascii character value.
+  __ mov_b(scratch, FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ mov_b(separator_operand, scratch);
+
+  __ Set(index, Immediate(0));
+  // Jump into the loop after the code that copies the separator, so the first
+  // element is not preceded by a separator
+  __ jmp(&loop_2_entry);
+  // Loop condition: while (index < length).
+  __ bind(&loop_2);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+
+  // Copy the separator character to the result.
+  __ mov_b(scratch, separator_operand);
+  __ mov_b(Operand(result_pos, 0), scratch);
+  __ inc(result_pos);
+
+  __ bind(&loop_2_entry);
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+  __ add(Operand(index), Immediate(1));
+
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_2);  // End while (index < length).
+  __ jmp(&done);
+
+
+  // Long separator case (separator is more than one character).
+  __ bind(&long_separator);
+
+  __ Set(index, Immediate(0));
+  // Jump into the loop after the code that copies the separator, so the first
+  // element is not preceded by a separator
+  __ jmp(&loop_3_entry);
+  // Loop condition: while (index < length).
+  __ bind(&loop_3);
+  // Each iteration of the loop concatenates one string to the result.
+  // Live values in registers:
+  //   index: which element of the elements array we are adding to the result.
+  //   result_pos: the position to which we are currently copying characters.
+
+  // Copy the separator to the result.
+  __ mov(string, separator_operand);
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
+
+  __ bind(&loop_3_entry);
+  // Get string = array[index].
+  __ mov(string, FieldOperand(elements, index,
+                              times_pointer_size,
+                              FixedArray::kHeaderSize));
+  __ mov(string_length,
+         FieldOperand(string, String::kLengthOffset));
+  __ shr(string_length, 1);
+  __ lea(string,
+         FieldOperand(string, SeqAsciiString::kHeaderSize));
+  __ CopyBytes(string, result_pos, string_length, scratch);
   __ add(Operand(index), Immediate(1));
-  __ jmp(&loop);  // End while (index < length).
+
+  __ cmp(index, array_length_operand);
+  __ j(less, &loop_3);  // End while (index < length).
+  __ jmp(&done);
+
 
   __ bind(&bailout);
-  __ mov(result, Factory::undefined_value());
+  __ mov(result_operand, Factory::undefined_value());
   __ bind(&done);
-  __ mov(eax, result);
+  __ mov(eax, result_operand);
   // Drop temp values from the stack, and restore context register.
-  __ add(Operand(esp), Immediate(5 * kPointerSize));
+  __ add(Operand(esp), Immediate(3 * kPointerSize));
 
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   context()->Plug(eax);
@@ -3739,7 +3835,9 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
     } else {
       if (prop->is_arguments_access()) {
         VariableProxy* obj_proxy = prop->obj()->AsVariableProxy();
-        __ push(EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx));
+        MemOperand slot_operand =
+            EmitSlotSearch(obj_proxy->var()->AsSlot(), ecx);
+        __ push(slot_operand);
         __ mov(eax, Immediate(prop->key()->AsLiteral()->handle()));
       } else {
         VisitForStackValue(prop->obj());
@@ -4042,7 +4140,6 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
 
     case Token::INSTANCEOF: {
       VisitForStackValue(expr->right());
-      __ IncrementCounter(&Counters::instance_of_full, 1);
       InstanceofStub stub(InstanceofStub::kNoFlags);
       __ CallStub(&stub);
       PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false);

deps/v8/src/ia32/ic-ia32.cc

@@ -1199,7 +1199,7 @@ void KeyedStoreIC::GenerateExternalArray(MacroAssembler* masm,
         break;
       case kExternalShortArray:
       case kExternalUnsignedShortArray:
-        __ xor_(ecx, Operand(ecx));
+        __ Set(ecx, Immediate(0));
         __ mov_w(Operand(edi, ebx, times_2, 0), ecx);
         break;
       case kExternalIntArray:
@@ -1219,9 +1219,6 @@ void KeyedStoreIC::GenerateExternalArray(MacroAssembler* masm,
 }
 
 
-// Defined in ic.cc.
-Object* CallIC_Miss(Arguments args);
-
 // The generated code does not accept smi keys.
 // The generated code falls through if both probes miss.
 static void GenerateMonomorphicCacheProbe(MacroAssembler* masm,
@@ -1567,9 +1564,6 @@ void KeyedCallIC::GenerateMiss(MacroAssembler* masm, int argc) {
 }
 
 
-// Defined in ic.cc.
-Object* LoadIC_Miss(Arguments args);
-
 void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : receiver
@@ -1795,10 +1789,6 @@ bool KeyedStoreIC::PatchInlinedStore(Address address, Object* map) {
 }
 
 
-// Defined in ic.cc.
-Object* KeyedLoadIC_Miss(Arguments args);
-
-
 void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : key
@@ -1982,9 +1972,6 @@ void StoreIC::GenerateGlobalProxy(MacroAssembler* masm) {
 }
 
 
-// Defined in ic.cc.
-Object* KeyedStoreIC_Miss(Arguments args);
-
 void KeyedStoreIC::GenerateRuntimeSetProperty(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax    : value

deps/v8/src/ia32/lithium-codegen-ia32.cc

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,6 +25,10 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#include "v8.h"
+
+#if defined(V8_TARGET_ARCH_IA32)
+
 #include "ia32/lithium-codegen-ia32.h"
 #include "code-stubs.h"
 #include "stub-cache.h"
@@ -54,6 +58,157 @@ class SafepointGenerator : public PostCallGenerator {
 };
 
 
+class LGapNode: public ZoneObject {
+ public:
+  explicit LGapNode(LOperand* operand)
+      : operand_(operand), resolved_(false), visited_id_(-1) { }
+
+  LOperand* operand() const { return operand_; }
+  bool IsResolved() const { return !IsAssigned() || resolved_; }
+  void MarkResolved() {
+    ASSERT(!IsResolved());
+    resolved_ = true;
+  }
+  int visited_id() const { return visited_id_; }
+  void set_visited_id(int id) {
+    ASSERT(id > visited_id_);
+    visited_id_ = id;
+  }
+
+  bool IsAssigned() const { return assigned_from_.is_set(); }
+  LGapNode* assigned_from() const { return assigned_from_.get(); }
+  void set_assigned_from(LGapNode* n) { assigned_from_.set(n); }
+
+ private:
+  LOperand* operand_;
+  SetOncePointer<LGapNode> assigned_from_;
+  bool resolved_;
+  int visited_id_;
+};
+
+
+LGapResolver::LGapResolver()
+    : nodes_(32),
+      identified_cycles_(4),
+      result_(16),
+      next_visited_id_(0) {
+}
+
+
+const ZoneList<LMoveOperands>* LGapResolver::Resolve(
+    const ZoneList<LMoveOperands>* moves,
+    LOperand* marker_operand) {
+  nodes_.Rewind(0);
+  identified_cycles_.Rewind(0);
+  result_.Rewind(0);
+  next_visited_id_ = 0;
+
+  for (int i = 0; i < moves->length(); ++i) {
+    LMoveOperands move = moves->at(i);
+    if (!move.IsRedundant()) RegisterMove(move);
+  }
+
+  for (int i = 0; i < identified_cycles_.length(); ++i) {
+    ResolveCycle(identified_cycles_[i], marker_operand);
+  }
+
+  int unresolved_nodes;
+  do {
+    unresolved_nodes = 0;
+    for (int j = 0; j < nodes_.length(); j++) {
+      LGapNode* node = nodes_[j];
+      if (!node->IsResolved() && node->assigned_from()->IsResolved()) {
+        AddResultMove(node->assigned_from(), node);
+        node->MarkResolved();
+      }
+      if (!node->IsResolved()) ++unresolved_nodes;
+    }
+  } while (unresolved_nodes > 0);
+  return &result_;
+}
+
+
+void LGapResolver::AddResultMove(LGapNode* from, LGapNode* to) {
+  AddResultMove(from->operand(), to->operand());
+}
+
+
+void LGapResolver::AddResultMove(LOperand* from, LOperand* to) {
+  result_.Add(LMoveOperands(from, to));
+}
+
+
+void LGapResolver::ResolveCycle(LGapNode* start, LOperand* marker_operand) {
+  ZoneList<LOperand*> cycle_operands(8);
+  cycle_operands.Add(marker_operand);
+  LGapNode* cur = start;
+  do {
+    cur->MarkResolved();
+    cycle_operands.Add(cur->operand());
+    cur = cur->assigned_from();
+  } while (cur != start);
+  cycle_operands.Add(marker_operand);
+
+  for (int i = cycle_operands.length() - 1; i > 0; --i) {
+    LOperand* from = cycle_operands[i];
+    LOperand* to = cycle_operands[i - 1];
+    AddResultMove(from, to);
+  }
+}
+
+
+bool LGapResolver::CanReach(LGapNode* a, LGapNode* b, int visited_id) {
+  ASSERT(a != b);
+  LGapNode* cur = a;
+  while (cur != b && cur->visited_id() != visited_id && cur->IsAssigned()) {
+    cur->set_visited_id(visited_id);
+    cur = cur->assigned_from();
+  }
+
+  return cur == b;
+}
+
+
+bool LGapResolver::CanReach(LGapNode* a, LGapNode* b) {
+  ASSERT(a != b);
+  return CanReach(a, b, next_visited_id_++);
+}
+
+
+void LGapResolver::RegisterMove(LMoveOperands move) {
+  if (move.from()->IsConstantOperand()) {
+    // Constant moves should be last in the machine code. Therefore add them
+    // first to the result set.
+    AddResultMove(move.from(), move.to());
+  } else {
+    LGapNode* from = LookupNode(move.from());
+    LGapNode* to = LookupNode(move.to());
+    if (to->IsAssigned() && to->assigned_from() == from) {
+      move.Eliminate();
+      return;
+    }
+    ASSERT(!to->IsAssigned());
+    if (CanReach(from, to)) {
+      // This introduces a cycle. Save.
+      identified_cycles_.Add(from);
+    }
+    to->set_assigned_from(from);
+  }
+}
+
+
+LGapNode* LGapResolver::LookupNode(LOperand* operand) {
+  for (int i = 0; i < nodes_.length(); ++i) {
+    if (nodes_[i]->operand()->Equals(operand)) return nodes_[i];
+  }
+
+  // No node found => create a new one.
+  LGapNode* result = new LGapNode(operand);
+  nodes_.Add(result);
+  return result;
+}
+
+
 #define __ masm()->
 
 bool LCodeGen::GenerateCode() {
@@ -135,6 +290,17 @@ bool LCodeGen::GeneratePrologue() {
       __ j(not_zero, &loop);
     } else {
       __ sub(Operand(esp), Immediate(slots * kPointerSize));
+#ifdef _MSC_VER
+      // On windows, you may not access the stack more than one page below
+      // the most recently mapped page. To make the allocated area randomly
+      // accessible, we write to each page in turn (the value is irrelevant).
+      const int kPageSize = 4 * KB;
+      for (int offset = slots * kPointerSize - kPageSize;
+           offset > 0;
+           offset -= kPageSize) {
+        __ mov(Operand(esp, offset), eax);
+      }
+#endif
     }
   }
 
@@ -261,6 +427,45 @@ Operand LCodeGen::ToOperand(LOperand* op) const {
 }
 
 
+void LCodeGen::WriteTranslation(LEnvironment* environment,
+                                Translation* translation) {
+  if (environment == NULL) return;
+
+  // The translation includes one command per value in the environment.
+  int translation_size = environment->values()->length();
+  // The output frame height does not include the parameters.
+  int height = translation_size - environment->parameter_count();
+
+  WriteTranslation(environment->outer(), translation);
+  int closure_id = DefineDeoptimizationLiteral(environment->closure());
+  translation->BeginFrame(environment->ast_id(), closure_id, height);
+  for (int i = 0; i < translation_size; ++i) {
+    LOperand* value = environment->values()->at(i);
+    // spilled_registers_ and spilled_double_registers_ are either
+    // both NULL or both set.
+    if (environment->spilled_registers() != NULL && value != NULL) {
+      if (value->IsRegister() &&
+          environment->spilled_registers()[value->index()] != NULL) {
+        translation->MarkDuplicate();
+        AddToTranslation(translation,
+                         environment->spilled_registers()[value->index()],
+                         environment->HasTaggedValueAt(i));
+      } else if (
+          value->IsDoubleRegister() &&
+          environment->spilled_double_registers()[value->index()] != NULL) {
+        translation->MarkDuplicate();
+        AddToTranslation(
+            translation,
+            environment->spilled_double_registers()[value->index()],
+            false);
+      }
+    }
+
+    AddToTranslation(translation, value, environment->HasTaggedValueAt(i));
+  }
+}
+
+
 void LCodeGen::AddToTranslation(Translation* translation,
                                 LOperand* op,
                                 bool is_tagged) {
@@ -385,7 +590,7 @@ void LCodeGen::RegisterEnvironmentForDeoptimization(LEnvironment* environment) {
       ++frame_count;
     }
     Translation translation(&translations_, frame_count);
-    environment->WriteTranslation(this, &translation);
+    WriteTranslation(environment, &translation);
     int deoptimization_index = deoptimizations_.length();
     environment->Register(deoptimization_index, translation.index());
     deoptimizations_.Add(environment);
@@ -564,8 +769,8 @@ void LCodeGen::DoParallelMove(LParallelMove* move) {
   Register cpu_scratch = esi;
   bool destroys_cpu_scratch = false;
 
-  LGapResolver resolver(move->move_operands(), &marker_operand);
-  const ZoneList<LMoveOperands>* moves = resolver.ResolveInReverseOrder();
+  const ZoneList<LMoveOperands>* moves =
+      resolver_.Resolve(move->move_operands(), &marker_operand);
   for (int i = moves->length() - 1; i >= 0; --i) {
     LMoveOperands move = moves->at(i);
     LOperand* from = move.from();
@@ -940,7 +1145,7 @@ void LCodeGen::DoSubI(LSubI* instr) {
 
 void LCodeGen::DoConstantI(LConstantI* instr) {
   ASSERT(instr->result()->IsRegister());
-  __ mov(ToRegister(instr->result()), instr->value());
+  __ Set(ToRegister(instr->result()), Immediate(instr->value()));
 }
 
 
@@ -973,27 +1178,21 @@ void LCodeGen::DoConstantD(LConstantD* instr) {
 
 void LCodeGen::DoConstantT(LConstantT* instr) {
   ASSERT(instr->result()->IsRegister());
-  __ mov(ToRegister(instr->result()), Immediate(instr->value()));
+  __ Set(ToRegister(instr->result()), Immediate(instr->value()));
 }
 
 
-void LCodeGen::DoArrayLength(LArrayLength* instr) {
+void LCodeGen::DoJSArrayLength(LJSArrayLength* instr) {
   Register result = ToRegister(instr->result());
+  Register array = ToRegister(instr->input());
+  __ mov(result, FieldOperand(array, JSArray::kLengthOffset));
+}
 
-  if (instr->hydrogen()->value()->IsLoadElements()) {
-    // We load the length directly from the elements array.
-    Register elements = ToRegister(instr->input());
-    __ mov(result, FieldOperand(elements, FixedArray::kLengthOffset));
-  } else {
-    // Check that the receiver really is an array.
-    Register array = ToRegister(instr->input());
-    Register temporary = ToRegister(instr->temporary());
-    __ CmpObjectType(array, JS_ARRAY_TYPE, temporary);
-    DeoptimizeIf(not_equal, instr->environment());
 
-    // Load length directly from the array.
-    __ mov(result, FieldOperand(array, JSArray::kLengthOffset));
-  }
+void LCodeGen::DoFixedArrayLength(LFixedArrayLength* instr) {
+  Register result = ToRegister(instr->result());
+  Register array = ToRegister(instr->input());
+  __ mov(result, FieldOperand(array, FixedArray::kLengthOffset));
 }
 
 
@@ -1700,7 +1899,7 @@ void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
 
 
 void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
-  // Object and function are in fixed registers eax and edx.
+  // Object and function are in fixed registers defined by the stub.
   InstanceofStub stub(InstanceofStub::kArgsInRegisters);
   CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
 
@@ -1726,6 +1925,107 @@ void LCodeGen::DoInstanceOfAndBranch(LInstanceOfAndBranch* instr) {
 }
 
 
+void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
+  class DeferredInstanceOfKnownGlobal: public LDeferredCode {
+   public:
+    DeferredInstanceOfKnownGlobal(LCodeGen* codegen,
+                                  LInstanceOfKnownGlobal* instr)
+        : LDeferredCode(codegen), instr_(instr) { }
+    virtual void Generate() {
+      codegen()->DoDeferredLInstanceOfKnownGlobal(instr_, &map_check_);
+    }
+
+    Label* map_check() { return &map_check_; }
+
+   private:
+    LInstanceOfKnownGlobal* instr_;
+    Label map_check_;
+  };
+
+  DeferredInstanceOfKnownGlobal* deferred;
+  deferred = new DeferredInstanceOfKnownGlobal(this, instr);
+
+  Label done, false_result;
+  Register object = ToRegister(instr->input());
+  Register temp = ToRegister(instr->temp());
+
+  // A Smi is not instance of anything.
+  __ test(object, Immediate(kSmiTagMask));
+  __ j(zero, &false_result, not_taken);
+
+  // This is the inlined call site instanceof cache. The two occourences of the
+  // hole value will be patched to the last map/result pair generated by the
+  // instanceof stub.
+  NearLabel cache_miss;
+  Register map = ToRegister(instr->temp());
+  __ mov(map, FieldOperand(object, HeapObject::kMapOffset));
+  __ bind(deferred->map_check());  // Label for calculating code patching.
+  __ cmp(map, Factory::the_hole_value());  // Patched to cached map.
+  __ j(not_equal, &cache_miss, not_taken);
+  __ mov(eax, Factory::the_hole_value());  // Patched to either true or false.
+  __ jmp(&done);
+
+  // The inlined call site cache did not match. Check null and string before
+  // calling the deferred code.
+  __ bind(&cache_miss);
+  // Null is not instance of anything.
+  __ cmp(object, Factory::null_value());
+  __ j(equal, &false_result);
+
+  // String values are not instances of anything.
+  Condition is_string = masm_->IsObjectStringType(object, temp, temp);
+  __ j(is_string, &false_result);
+
+  // Go to the deferred code.
+  __ jmp(deferred->entry());
+
+  __ bind(&false_result);
+  __ mov(ToRegister(instr->result()), Factory::false_value());
+
+  // Here result has either true or false. Deferred code also produces true or
+  // false object.
+  __ bind(deferred->exit());
+  __ bind(&done);
+}
+
+
+void LCodeGen::DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
+                                                Label* map_check) {
+  __ PushSafepointRegisters();
+
+  InstanceofStub::Flags flags = InstanceofStub::kNoFlags;
+  flags = static_cast<InstanceofStub::Flags>(
+      flags | InstanceofStub::kArgsInRegisters);
+  flags = static_cast<InstanceofStub::Flags>(
+      flags | InstanceofStub::kCallSiteInlineCheck);
+  flags = static_cast<InstanceofStub::Flags>(
+      flags | InstanceofStub::kReturnTrueFalseObject);
+  InstanceofStub stub(flags);
+
+  // Get the temp register reserved by the instruction. This needs to be edi as
+  // its slot of the pushing of safepoint registers is used to communicate the
+  // offset to the location of the map check.
+  Register temp = ToRegister(instr->temp());
+  ASSERT(temp.is(edi));
+  __ mov(InstanceofStub::right(), Immediate(instr->function()));
+  static const int kAdditionalDelta = 13;
+  int delta = masm_->SizeOfCodeGeneratedSince(map_check) + kAdditionalDelta;
+  Label before_push_delta;
+  __ bind(&before_push_delta);
+  __ mov(temp, Immediate(delta));
+  __ mov(Operand(esp, EspIndexForPushAll(temp) * kPointerSize), temp);
+  __ call(stub.GetCode(), RelocInfo::CODE_TARGET);
+  ASSERT_EQ(kAdditionalDelta,
+            masm_->SizeOfCodeGeneratedSince(&before_push_delta));
+  RecordSafepointWithRegisters(
+      instr->pointer_map(), 0, Safepoint::kNoDeoptimizationIndex);
+  // Put the result value into the eax slot and restore all registers.
+  __ mov(Operand(esp, EspIndexForPushAll(eax) * kPointerSize), eax);
+
+  __ PopSafepointRegisters();
+}
+
+
 static Condition ComputeCompareCondition(Token::Value op) {
   switch (op) {
     case Token::EQ_STRICT:
@@ -1815,6 +2115,14 @@ void LCodeGen::DoStoreGlobal(LStoreGlobal* instr) {
 }
 
 
+void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
+  // TODO(antonm): load a context with a separate instruction.
+  Register result = ToRegister(instr->result());
+  __ LoadContext(result, instr->context_chain_length());
+  __ mov(result, ContextOperand(result, instr->slot_index()));
+}
+
+
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
   Register object = ToRegister(instr->input());
   Register result = ToRegister(instr->result());
@@ -1837,6 +2145,48 @@ void LCodeGen::DoLoadNamedGeneric(LLoadNamedGeneric* instr) {
 }
 
 
+void LCodeGen::DoLoadFunctionPrototype(LLoadFunctionPrototype* instr) {
+  Register function = ToRegister(instr->function());
+  Register temp = ToRegister(instr->temporary());
+  Register result = ToRegister(instr->result());
+
+  // Check that the function really is a function.
+  __ CmpObjectType(function, JS_FUNCTION_TYPE, result);
+  DeoptimizeIf(not_equal, instr->environment());
+
+  // Check whether the function has an instance prototype.
+  NearLabel non_instance;
+  __ test_b(FieldOperand(result, Map::kBitFieldOffset),
+            1 << Map::kHasNonInstancePrototype);
+  __ j(not_zero, &non_instance);
+
+  // Get the prototype or initial map from the function.
+  __ mov(result,
+         FieldOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
+
+  // Check that the function has a prototype or an initial map.
+  __ cmp(Operand(result), Immediate(Factory::the_hole_value()));
+  DeoptimizeIf(equal, instr->environment());
+
+  // If the function does not have an initial map, we're done.
+  NearLabel done;
+  __ CmpObjectType(result, MAP_TYPE, temp);
+  __ j(not_equal, &done);
+
+  // Get the prototype from the initial map.
+  __ mov(result, FieldOperand(result, Map::kPrototypeOffset));
+  __ jmp(&done);
+
+  // Non-instance prototype: Fetch prototype from constructor field
+  // in the function's map.
+  __ bind(&non_instance);
+  __ mov(result, FieldOperand(result, Map::kConstructorOffset));
+
+  // All done.
+  __ bind(&done);
+}
+
+
 void LCodeGen::DoLoadElements(LLoadElements* instr) {
   ASSERT(instr->result()->Equals(instr->input()));
   Register reg = ToRegister(instr->input());
@@ -1863,6 +2213,8 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
   __ sub(length, index);
   DeoptimizeIf(below_equal, instr->environment());
 
+  // There are two words between the frame pointer and the last argument.
+  // Subtracting from length accounts for one of them add one more.
   __ mov(result, Operand(arguments, length, times_4, kPointerSize));
 }
 
@@ -1870,32 +2222,15 @@ void LCodeGen::DoAccessArgumentsAt(LAccessArgumentsAt* instr) {
 void LCodeGen::DoLoadKeyedFastElement(LLoadKeyedFastElement* instr) {
   Register elements = ToRegister(instr->elements());
   Register key = ToRegister(instr->key());
-  Register result;
-  if (instr->load_result() != NULL) {
-    result = ToRegister(instr->load_result());
-  } else {
-    result = ToRegister(instr->result());
-    ASSERT(result.is(elements));
-  }
+  Register result = ToRegister(instr->result());
+  ASSERT(result.is(elements));
 
   // Load the result.
   __ mov(result, FieldOperand(elements, key, times_4, FixedArray::kHeaderSize));
 
-  Representation r = instr->hydrogen()->representation();
-  if (r.IsInteger32()) {
-    // Untag and check for smi.
-    __ SmiUntag(result);
-    DeoptimizeIf(carry, instr->environment());
-  } else if (r.IsDouble()) {
-    EmitNumberUntagD(result,
-                     ToDoubleRegister(instr->result()),
-                     instr->environment());
-  } else {
-    // Check for the hole value.
-    ASSERT(r.IsTagged());
-    __ cmp(result, Factory::the_hole_value());
-    DeoptimizeIf(equal, instr->environment());
-  }
+  // Check for the hole value.
+  __ cmp(result, Factory::the_hole_value());
+  DeoptimizeIf(equal, instr->environment());
 }
 
 
@@ -1912,7 +2247,7 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register result = ToRegister(instr->result());
 
   // Check for arguments adapter frame.
-  Label done, adapted;
+  NearLabel done, adapted;
   __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
   __ mov(result, Operand(result, StandardFrameConstants::kContextOffset));
   __ cmp(Operand(result),
@@ -1927,7 +2262,8 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   __ bind(&adapted);
   __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
 
-  // Done. Pointer to topmost argument is in result.
+  // Result is the frame pointer for the frame if not adapted and for the real
+  // frame below the adaptor frame if adapted.
   __ bind(&done);
 }
 
@@ -1936,9 +2272,9 @@ void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
   Operand elem = ToOperand(instr->input());
   Register result = ToRegister(instr->result());
 
-  Label done;
+  NearLabel done;
 
-  // No arguments adaptor frame. Number of arguments is fixed.
+  // If no arguments adaptor frame the number of arguments is fixed.
   __ cmp(ebp, elem);
   __ mov(result, Immediate(scope()->num_parameters()));
   __ j(equal, &done);
@@ -1949,7 +2285,7 @@ void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
                          ArgumentsAdaptorFrameConstants::kLengthOffset));
   __ SmiUntag(result);
 
-  // Done. Argument length is in result register.
+  // Argument length is in result register.
   __ bind(&done);
 }
 
@@ -2498,7 +2834,6 @@ void LCodeGen::DoStoreKeyedFastElement(LStoreKeyedFastElement* instr) {
            value);
   }
 
-  // Update the write barrier unless we're certain that we're storing a smi.
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     // Compute address of modified element and store it into key register.
     __ lea(key, FieldOperand(elements, key, times_4, FixedArray::kHeaderSize));
@@ -2849,9 +3184,60 @@ void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
       __ add(Operand(esp), Immediate(kDoubleSize));
       __ bind(&done);
     } else {
-      // This will bail out if the input was not in the int32 range (or,
-      // unfortunately, if the input was 0x80000000).
-      DeoptimizeIf(equal, instr->environment());
+      NearLabel done;
+      Register temp_reg = ToRegister(instr->temporary());
+      XMMRegister xmm_scratch = xmm0;
+
+      // If cvttsd2si succeeded, we're done. Otherwise, we attempt
+      // manual conversion.
+      __ j(not_equal, &done);
+
+      // Get high 32 bits of the input in result_reg and temp_reg.
+      __ pshufd(xmm_scratch, input_reg, 1);
+      __ movd(Operand(temp_reg), xmm_scratch);
+      __ mov(result_reg, temp_reg);
+
+      // Prepare negation mask in temp_reg.
+      __ sar(temp_reg, kBitsPerInt - 1);
+
+      // Extract the exponent from result_reg and subtract adjusted
+      // bias from it. The adjustment is selected in a way such that
+      // when the difference is zero, the answer is in the low 32 bits
+      // of the input, otherwise a shift has to be performed.
+      __ shr(result_reg, HeapNumber::kExponentShift);
+      __ and_(result_reg,
+              HeapNumber::kExponentMask >> HeapNumber::kExponentShift);
+      __ sub(Operand(result_reg),
+             Immediate(HeapNumber::kExponentBias +
+                       HeapNumber::kExponentBits +
+                       HeapNumber::kMantissaBits));
+      // Don't handle big (> kMantissaBits + kExponentBits == 63) or
+      // special exponents.
+      DeoptimizeIf(greater, instr->environment());
+
+      // Zero out the sign and the exponent in the input (by shifting
+      // it to the left) and restore the implicit mantissa bit,
+      // i.e. convert the input to unsigned int64 shifted left by
+      // kExponentBits.
+      ExternalReference minus_zero = ExternalReference::address_of_minus_zero();
+      // Minus zero has the most significant bit set and the other
+      // bits cleared.
+      __ movdbl(xmm_scratch, Operand::StaticVariable(minus_zero));
+      __ psllq(input_reg, HeapNumber::kExponentBits);
+      __ por(input_reg, xmm_scratch);
+
+      // Get the amount to shift the input right in xmm_scratch.
+      __ neg(result_reg);
+      __ movd(xmm_scratch, Operand(result_reg));
+
+      // Shift the input right and extract low 32 bits.
+      __ psrlq(input_reg, xmm_scratch);
+      __ movd(Operand(result_reg), input_reg);
+
+      // Use the prepared mask in temp_reg to negate the result if necessary.
+      __ xor_(result_reg, Operand(temp_reg));
+      __ sub(result_reg, Operand(temp_reg));
+      __ bind(&done);
     }
   } else {
     NearLabel done;
@@ -2891,9 +3277,6 @@ void LCodeGen::DoCheckInstanceType(LCheckInstanceType* instr) {
   InstanceType first = instr->hydrogen()->first();
   InstanceType last = instr->hydrogen()->last();
 
-  __ test(input, Immediate(kSmiTagMask));
-  DeoptimizeIf(zero, instr->environment());
-
   __ mov(temp, FieldOperand(input, HeapObject::kMapOffset));
   __ cmpb(FieldOperand(temp, Map::kInstanceTypeOffset),
           static_cast<int8_t>(first));
@@ -2931,13 +3314,13 @@ void LCodeGen::DoCheckMap(LCheckMap* instr) {
 }
 
 
-void LCodeGen::LoadPrototype(Register result, Handle<JSObject> prototype) {
-  if (Heap::InNewSpace(*prototype)) {
+void LCodeGen::LoadHeapObject(Register result, Handle<HeapObject> object) {
+  if (Heap::InNewSpace(*object)) {
     Handle<JSGlobalPropertyCell> cell =
-        Factory::NewJSGlobalPropertyCell(prototype);
+        Factory::NewJSGlobalPropertyCell(object);
     __ mov(result, Operand::Cell(cell));
   } else {
-    __ mov(result, prototype);
+    __ mov(result, object);
   }
 }
 
@@ -2946,11 +3329,10 @@ void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
   Register reg = ToRegister(instr->temp());
 
   Handle<JSObject> holder = instr->holder();
-  Handle<Map> receiver_map = instr->receiver_map();
-  Handle<JSObject> current_prototype(JSObject::cast(receiver_map->prototype()));
+  Handle<JSObject> current_prototype = instr->prototype();
 
   // Load prototype object.
-  LoadPrototype(reg, current_prototype);
+  LoadHeapObject(reg, current_prototype);
 
   // Check prototype maps up to the holder.
   while (!current_prototype.is_identical_to(holder)) {
@@ -2960,7 +3342,7 @@ void LCodeGen::DoCheckPrototypeMaps(LCheckPrototypeMaps* instr) {
     current_prototype =
         Handle<JSObject>(JSObject::cast(current_prototype->GetPrototype()));
     // Load next prototype object.
-    LoadPrototype(reg, current_prototype);
+    LoadHeapObject(reg, current_prototype);
   }
 
   // Check the holder map.
@@ -3006,7 +3388,7 @@ void LCodeGen::DoObjectLiteral(LObjectLiteral* instr) {
   __ push(Immediate(instr->hydrogen()->constant_properties()));
   __ push(Immediate(Smi::FromInt(instr->hydrogen()->fast_elements() ? 1 : 0)));
 
-  // Pick the right runtime function or stub to call.
+  // Pick the right runtime function to call.
   if (instr->hydrogen()->depth() > 1) {
     CallRuntime(Runtime::kCreateObjectLiteral, 4, instr);
   } else {
@@ -3274,3 +3656,5 @@ void LCodeGen::DoOsrEntry(LOsrEntry* instr) {
 #undef __
 
 } }  // namespace v8::internal
+
+#endif  // V8_TARGET_ARCH_IA32

deps/v8/src/ia32/lithium-codegen-ia32.h

@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -40,8 +40,30 @@ namespace internal {
 
 // Forward declarations.
 class LDeferredCode;
+class LGapNode;
 class SafepointGenerator;
 
+class LGapResolver BASE_EMBEDDED {
+ public:
+  LGapResolver();
+  const ZoneList<LMoveOperands>* Resolve(const ZoneList<LMoveOperands>* moves,
+                                         LOperand* marker_operand);
+
+ private:
+  LGapNode* LookupNode(LOperand* operand);
+  bool CanReach(LGapNode* a, LGapNode* b, int visited_id);
+  bool CanReach(LGapNode* a, LGapNode* b);
+  void RegisterMove(LMoveOperands move);
+  void AddResultMove(LOperand* from, LOperand* to);
+  void AddResultMove(LGapNode* from, LGapNode* to);
+  void ResolveCycle(LGapNode* start, LOperand* marker_operand);
+
+  ZoneList<LGapNode*> nodes_;
+  ZoneList<LGapNode*> identified_cycles_;
+  ZoneList<LMoveOperands> result_;
+  int next_visited_id_;
+};
+
 
 class LCodeGen BASE_EMBEDDED {
  public:
@@ -77,10 +99,15 @@ class LCodeGen BASE_EMBEDDED {
   void DoDeferredTaggedToI(LTaggedToI* instr);
   void DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr);
   void DoDeferredStackCheck(LGoto* instr);
+  void DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr,
+                                        Label* map_check);
 
   // Parallel move support.
   void DoParallelMove(LParallelMove* move);
 
+  // Emit frame translation commands for an environment.
+  void WriteTranslation(LEnvironment* environment, Translation* translation);
+
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
@@ -148,7 +175,7 @@ class LCodeGen BASE_EMBEDDED {
                          int arity,
                          LInstruction* instr);
 
-  void LoadPrototype(Register result, Handle<JSObject> prototype);
+  void LoadHeapObject(Register result, Handle<HeapObject> object);
 
   void RegisterLazyDeoptimization(LInstruction* instr);
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment);
@@ -228,6 +255,9 @@ class LCodeGen BASE_EMBEDDED {
   // itself is emitted at the end of the generated code.
   SafepointTableBuilder safepoints_;
 
+  // Compiler from a set of parallel moves to a sequential list of moves.
+  LGapResolver resolver_;
+
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;

deps/v8/src/ia32/macro-assembler-ia32.cc

@@ -877,55 +877,53 @@ void MacroAssembler::AllocateAsciiConsString(Register result,
       Immediate(Factory::cons_ascii_string_map()));
 }
 
-// All registers must be distinct.  Only current_string needs valid contents
-// on entry.  All registers may be invalid on exit.  result_operand is
-// unchanged, padding_chars is updated correctly.
-void MacroAssembler::AppendStringToTopOfNewSpace(
-    Register current_string,  // Tagged pointer to string to copy.
-    Register current_string_length,
-    Register result_pos,
-    Register scratch,
-    Register new_padding_chars,
-    Operand operand_result,
-    Operand operand_padding_chars,
-    Label* bailout) {
-  mov(current_string_length,
-      FieldOperand(current_string, String::kLengthOffset));
-  shr(current_string_length, 1);
-  sub(current_string_length, operand_padding_chars);
-  mov(new_padding_chars, current_string_length);
-  add(Operand(current_string_length), Immediate(kObjectAlignmentMask));
-  and_(Operand(current_string_length), Immediate(~kObjectAlignmentMask));
-  sub(new_padding_chars, Operand(current_string_length));
-  neg(new_padding_chars);
-  // We need an allocation even if current_string_length is 0, to fetch
-  // result_pos.  Consider using a faster fetch of result_pos in that case.
-  AllocateInNewSpace(current_string_length, result_pos, scratch, no_reg,
-                     bailout, NO_ALLOCATION_FLAGS);
-  sub(result_pos, operand_padding_chars);
-  mov(operand_padding_chars, new_padding_chars);
-
-  Register scratch_2 = new_padding_chars;  // Used to compute total length.
-  // Copy string to the end of result.
-  mov(current_string_length,
-      FieldOperand(current_string, String::kLengthOffset));
-  mov(scratch, operand_result);
-  mov(scratch_2, current_string_length);
-  add(scratch_2, FieldOperand(scratch, String::kLengthOffset));
-  mov(FieldOperand(scratch, String::kLengthOffset), scratch_2);
-  shr(current_string_length, 1);
-  lea(current_string,
-      FieldOperand(current_string, SeqAsciiString::kHeaderSize));
-  // Loop condition: while (--current_string_length >= 0).
-  Label copy_loop;
-  Label copy_loop_entry;
-  jmp(&copy_loop_entry);
-  bind(&copy_loop);
-  mov_b(scratch, Operand(current_string, current_string_length, times_1, 0));
-  mov_b(Operand(result_pos, current_string_length, times_1, 0), scratch);
-  bind(&copy_loop_entry);
-  sub(Operand(current_string_length), Immediate(1));
-  j(greater_equal, &copy_loop);
+
+// Copy memory, byte-by-byte, from source to destination.  Not optimized for
+// long or aligned copies.  The contents of scratch and length are destroyed.
+// Source and destination are incremented by length.
+// Many variants of movsb, loop unrolling, word moves, and indexed operands
+// have been tried here already, and this is fastest.
+// A simpler loop is faster on small copies, but 30% slower on large ones.
+// The cld() instruction must have been emitted, to set the direction flag(),
+// before calling this function.
+void MacroAssembler::CopyBytes(Register source,
+                               Register destination,
+                               Register length,
+                               Register scratch) {
+  Label loop, done, short_string, short_loop;
+  // Experimentation shows that the short string loop is faster if length < 10.
+  cmp(Operand(length), Immediate(10));
+  j(less_equal, &short_string);
+
+  ASSERT(source.is(esi));
+  ASSERT(destination.is(edi));
+  ASSERT(length.is(ecx));
+
+  // Because source is 4-byte aligned in our uses of this function,
+  // we keep source aligned for the rep_movs call by copying the odd bytes
+  // at the end of the ranges.
+  mov(scratch, Operand(source, length, times_1, -4));
+  mov(Operand(destination, length, times_1, -4), scratch);
+  mov(scratch, ecx);
+  shr(ecx, 2);
+  rep_movs();
+  and_(Operand(scratch), Immediate(0x3));
+  add(destination, Operand(scratch));
+  jmp(&done);
+
+  bind(&short_string);
+  test(length, Operand(length));
+  j(zero, &done);
+
+  bind(&short_loop);
+  mov_b(scratch, Operand(source, 0));
+  mov_b(Operand(destination, 0), scratch);
+  inc(source);
+  inc(destination);
+  dec(length);
+  j(not_zero, &short_loop);
+
+  bind(&done);
 }
 
 
@@ -1715,7 +1713,7 @@ void MacroAssembler::Abort(const char* msg) {
   }
 #endif
   // Disable stub call restrictions to always allow calls to abort.
-  set_allow_stub_calls(true);
+  AllowStubCallsScope allow_scope(this, true);
 
   push(eax);
   push(Immediate(p0));

deps/v8/src/ia32/macro-assembler-ia32.h

@@ -386,22 +386,13 @@ class MacroAssembler: public Assembler {
                                Register scratch2,
                                Label* gc_required);
 
-  // All registers must be distinct.  Only current_string needs valid contents
-  // on entry.  All registers may be invalid on exit.  result_operand is
-  // unchanged, padding_chars is updated correctly.
-  // The top of new space must contain a sequential ascii string with
-  // padding_chars bytes free in its top word.  The sequential ascii string
-  // current_string is concatenated to it, allocating the necessary amount
-  // of new memory.
-  void AppendStringToTopOfNewSpace(
-      Register current_string,  // Tagged pointer to string to copy.
-      Register current_string_length,
-      Register result_pos,
-      Register scratch,
-      Register new_padding_chars,
-      Operand operand_result,
-      Operand operand_padding_chars,
-      Label* bailout);
+  // Copy memory, byte-by-byte, from source to destination.  Not optimized for
+  // long or aligned copies.
+  // The contents of index and scratch are destroyed.
+  void CopyBytes(Register source,
+                 Register destination,
+                 Register length,
+                 Register scratch);
 
   // ---------------------------------------------------------------------------
   // Support functions.

deps/v8/src/ia32/regexp-macro-assembler-ia32.cc

@@ -211,9 +211,7 @@ void RegExpMacroAssemblerIA32::CheckCharacters(Vector<const uc16> str,
   // If input is ASCII, don't even bother calling here if the string to
   // match contains a non-ascii character.
   if (mode_ == ASCII) {
-    for (int i = 0; i < str.length(); i++) {
-      ASSERT(str[i] <= String::kMaxAsciiCharCodeU);
-    }
+    ASSERT(String::IsAscii(str.start(), str.length()));
   }
 #endif
   int byte_length = str.length() * char_size();
@@ -654,7 +652,7 @@ bool RegExpMacroAssemblerIA32::CheckSpecialCharacterClass(uc16 type,
 
 void RegExpMacroAssemblerIA32::Fail() {
   ASSERT(FAILURE == 0);  // Return value for failure is zero.
-  __ xor_(eax, Operand(eax));  // zero eax.
+  __ Set(eax, Immediate(0));
   __ jmp(&exit_label_);
 }
 

deps/v8/src/ia32/stub-cache-ia32.cc

@@ -1686,6 +1686,7 @@ MaybeObject* CallStubCompiler::CompileStringCharCodeAtCall(
 
   Label miss;
   Label index_out_of_range;
+
   GenerateNameCheck(name, &miss);
 
   // Check that the maps starting from the prototype haven't changed.

deps/v8/src/json.js

@@ -27,11 +27,6 @@
 
 var $JSON = global.JSON;
 
-function ParseJSONUnfiltered(text) {
-  var s = $String(text);
-  return %ParseJson(s);
-}
-
 function Revive(holder, name, reviver) {
   var val = holder[name];
   if (IS_OBJECT(val)) {
@@ -58,7 +53,7 @@ function Revive(holder, name, reviver) {
 }
 
 function JSONParse(text, reviver) {
-  var unfiltered = ParseJSONUnfiltered(text);
+  var unfiltered = %ParseJson(TO_STRING_INLINE(text));
   if (IS_FUNCTION(reviver)) {
     return Revive({'': unfiltered}, '', reviver);
   } else {
@@ -158,7 +153,7 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
   if (IS_STRING(value)) {
     return %QuoteJSONString(value);
   } else if (IS_NUMBER(value)) {
-    return $isFinite(value) ? $String(value) : "null";
+    return NUMBER_IS_FINITE(value) ? $String(value) : "null";
   } else if (IS_BOOLEAN(value)) {
     return value ? "true" : "false";
   } else if (IS_NULL(value)) {
@@ -169,7 +164,7 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
       return SerializeArray(value, replacer, stack, indent, gap);
     } else if (IS_NUMBER_WRAPPER(value)) {
       value = ToNumber(value);
-      return $isFinite(value) ? ToString(value) : "null";
+      return NUMBER_IS_FINITE(value) ? ToString(value) : "null";
     } else if (IS_STRING_WRAPPER(value)) {
       return %QuoteJSONString(ToString(value));
     } else if (IS_BOOLEAN_WRAPPER(value)) {
@@ -184,24 +179,60 @@ function JSONSerialize(key, holder, replacer, stack, indent, gap) {
 
 
 function BasicSerializeArray(value, stack, builder) {
+  var len = value.length;
+  if (len == 0) {
+    builder.push("[]");
+    return;
+  }
   if (!%PushIfAbsent(stack, value)) {
     throw MakeTypeError('circular_structure', []);
   }
   builder.push("[");
-  var len = value.length;
-  for (var i = 0; i < len; i++) {
+  var val = value[0];
+  if (IS_STRING(val)) {
+    // First entry is a string. Remaining entries are likely to be strings too.
+    builder.push(%QuoteJSONString(val));
+    for (var i = 1; i < len; i++) {
+      val = value[i];
+      if (IS_STRING(val)) {
+        builder.push(%QuoteJSONStringComma(val));
+      } else {
+        builder.push(",");
+        var before = builder.length;
+        BasicJSONSerialize(i, value[i], stack, builder);
+        if (before == builder.length) builder[before - 1] = ",null";
+      }
+    }
+  } else if (IS_NUMBER(val)) {
+    // First entry is a number. Remaining entries are likely to be numbers too.
+    builder.push(NUMBER_IS_FINITE(val) ? %_NumberToString(val) : "null");
+    for (var i = 1; i < len; i++) {
+      builder.push(",");
+      val = value[i];
+      if (IS_NUMBER(val)) {
+        builder.push(NUMBER_IS_FINITE(val) 
+                     ? %_NumberToString(val) 
+                     : "null");
+      } else {
+        var before = builder.length;
+        BasicJSONSerialize(i, value[i], stack, builder);
+        if (before == builder.length) builder[before - 1] = ",null";
+      }
+    }
+  } else {
     var before = builder.length;
-    BasicJSONSerialize(i, value, stack, builder);
+    BasicJSONSerialize(0, val, stack, builder);
     if (before == builder.length) builder.push("null");
-    builder.push(",");
+    for (var i = 1; i < len; i++) {
+      builder.push(",");
+      before = builder.length;
+      val = value[i];
+      BasicJSONSerialize(i, val, stack, builder);
+      if (before == builder.length) builder[before - 1] = ",null";
+    }
   }
   stack.pop();
-  if (builder.pop() != ",") {
-    builder.push("[]");  // Zero length array. Push "[" back on.
-  } else {
-    builder.push("]");
-  }
-
+  builder.push("]"); 
 }
 
 
@@ -210,31 +241,31 @@ function BasicSerializeObject(value, stack, builder) {
     throw MakeTypeError('circular_structure', []);
   }
   builder.push("{");
+  var first = true;
   for (var p in value) {
     if (%HasLocalProperty(value, p)) {
-      builder.push(%QuoteJSONString(p));
+      if (!first) {
+        builder.push(%QuoteJSONStringComma(p));
+      } else {
+        builder.push(%QuoteJSONString(p));
+      }
       builder.push(":");
       var before = builder.length;
-      BasicJSONSerialize(p, value, stack, builder);
+      BasicJSONSerialize(p, value[p], stack, builder);
       if (before == builder.length) {
         builder.pop();
         builder.pop();
       } else {
-        builder.push(",");
+        first = false;
       }
     }
   }
   stack.pop();
-  if (builder.pop() != ",") {
-    builder.push("{}");  // Object has no own properties. Push "{" back on.
-  } else {
-    builder.push("}");
-  }
+  builder.push("}");
 }
 
 
-function BasicJSONSerialize(key, holder, stack, builder) {
-  var value = holder[key];
+function BasicJSONSerialize(key, value, stack, builder) {
   if (IS_SPEC_OBJECT(value)) {
     var toJSON = value.toJSON;
     if (IS_FUNCTION(toJSON)) {
@@ -244,7 +275,7 @@ function BasicJSONSerialize(key, holder, stack, builder) {
   if (IS_STRING(value)) {
     builder.push(%QuoteJSONString(value));
   } else if (IS_NUMBER(value)) {
-    builder.push(($isFinite(value) ? %_NumberToString(value) : "null"));
+    builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
   } else if (IS_BOOLEAN(value)) {
     builder.push(value ? "true" : "false");
   } else if (IS_NULL(value)) {
@@ -254,7 +285,7 @@ function BasicJSONSerialize(key, holder, stack, builder) {
     // Unwrap value if necessary
     if (IS_NUMBER_WRAPPER(value)) {
       value = ToNumber(value);
-      builder.push(($isFinite(value) ? %_NumberToString(value) : "null"));
+      builder.push(NUMBER_IS_FINITE(value) ? %_NumberToString(value) : "null");
     } else if (IS_STRING_WRAPPER(value)) {
       builder.push(%QuoteJSONString(ToString(value)));
     } else if (IS_BOOLEAN_WRAPPER(value)) {
@@ -271,7 +302,7 @@ function BasicJSONSerialize(key, holder, stack, builder) {
 function JSONStringify(value, replacer, space) {
   if (%_ArgumentsLength() == 1) {
     var builder = [];
-    BasicJSONSerialize('', {'': value}, [], builder);
+    BasicJSONSerialize('', value, [], builder);
     if (builder.length == 0) return;
     var result = %_FastAsciiArrayJoin(builder, "");
     if (!IS_UNDEFINED(result)) return result;

deps/v8/src/jsregexp.cc

@@ -425,7 +425,7 @@ RegExpImpl::IrregexpResult RegExpImpl::IrregexpExecOnce(
     Handle<JSRegExp> regexp,
     Handle<String> subject,
     int index,
-    Vector<int32_t> output) {
+    Vector<int> output) {
   Handle<FixedArray> irregexp(FixedArray::cast(regexp->data()));
 
   ASSERT(index >= 0);
@@ -521,8 +521,8 @@ Handle<Object> RegExpImpl::IrregexpExec(Handle<JSRegExp> jsregexp,
   OffsetsVector registers(required_registers);
 
   IrregexpResult res = RegExpImpl::IrregexpExecOnce(
-      jsregexp, subject, previous_index, Vector<int32_t>(registers.vector(),
-                                                         registers.length()));
+      jsregexp, subject, previous_index, Vector<int>(registers.vector(),
+                                                     registers.length()));
   if (res == RE_SUCCESS) {
     int capture_register_count =
         (IrregexpNumberOfCaptures(FixedArray::cast(jsregexp->data())) + 1) * 2;

deps/v8/src/jsregexp.h

@@ -114,7 +114,7 @@ class RegExpImpl {
   static IrregexpResult IrregexpExecOnce(Handle<JSRegExp> regexp,
                                          Handle<String> subject,
                                          int index,
-                                         Vector<int32_t> registers);
+                                         Vector<int> registers);
 
   // Execute an Irregexp bytecode pattern.
   // On a successful match, the result is a JSArray containing

deps/v8/src/lithium-allocator.cc

@@ -27,7 +27,6 @@
 
 #include "lithium-allocator.h"
 
-#include "data-flow.h"
 #include "hydrogen.h"
 #include "string-stream.h"
 
@@ -107,9 +106,6 @@ void LOperand::PrintTo(StringStream* stream) {
         case LUnallocated::SAME_AS_FIRST_INPUT:
           stream->Add("(1)");
           break;
-        case LUnallocated::SAME_AS_ANY_INPUT:
-          stream->Add("(A)");
-          break;
         case LUnallocated::ANY:
           stream->Add("(-)");
           break;
@@ -832,9 +828,19 @@ void LAllocator::MeetConstraintsBetween(InstructionSummary* first,
         AllocateFixed(cur_input, gap_index + 1, is_tagged);
         AddConstraintsGapMove(gap_index, input_copy, cur_input);
       } else if (cur_input->policy() == LUnallocated::WRITABLE_REGISTER) {
+        // The live range of writable input registers always goes until the end
+        // of the instruction.
+        ASSERT(!cur_input->IsUsedAtStart());
+
         LUnallocated* input_copy = cur_input->CopyUnconstrained();
         cur_input->set_virtual_register(next_virtual_register_++);
-        second->AddTemp(cur_input);
+
+        if (RequiredRegisterKind(input_copy->virtual_register()) ==
+            DOUBLE_REGISTERS) {
+          double_artificial_registers_.Add(
+              cur_input->virtual_register() - first_artificial_register_);
+        }
+
         AddConstraintsGapMove(gap_index, input_copy, cur_input);
       }
     }
@@ -937,6 +943,9 @@ void LAllocator::ProcessInstructions(HBasicBlock* block, BitVector* live) {
                                     curr_position.InstructionEnd());
             }
           }
+        }
+
+        if (summary->IsCall() || summary->IsSaveDoubles()) {
           for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; ++i) {
             if (output == NULL || !output->IsDoubleRegister() ||
                 output->index() != i) {
@@ -1036,6 +1045,7 @@ void LAllocator::Allocate(LChunk* chunk) {
 
 void LAllocator::MeetRegisterConstraints() {
   HPhase phase("Register constraints", chunk());
+  first_artificial_register_ = next_virtual_register_;
   const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
   for (int i = 0; i < blocks->length(); ++i) {
     HBasicBlock* block = blocks->at(i);
@@ -1564,16 +1574,47 @@ bool LAllocator::HasTaggedValue(int virtual_register) const {
 
 
 RegisterKind LAllocator::RequiredRegisterKind(int virtual_register) const {
-  HValue* value = graph()->LookupValue(virtual_register);
-  if (value != NULL && value->representation().IsDouble()) {
+  if (virtual_register < first_artificial_register_) {
+    HValue* value = graph()->LookupValue(virtual_register);
+    if (value != NULL && value->representation().IsDouble()) {
+      return DOUBLE_REGISTERS;
+    }
+  } else if (double_artificial_registers_.Contains(
+      virtual_register - first_artificial_register_)) {
     return DOUBLE_REGISTERS;
   }
+
   return GENERAL_REGISTERS;
 }
 
 
 void LAllocator::MarkAsCall() {
-  current_summary()->MarkAsCall();
+  // Call instructions can use only fixed registers as
+  // temporaries and outputs because all registers
+  // are blocked by the calling convention.
+  // Inputs can use either fixed register or have a short lifetime (be
+  // used at start of the instruction).
+  InstructionSummary* summary = current_summary();
+#ifdef DEBUG
+  ASSERT(summary->Output() == NULL ||
+         LUnallocated::cast(summary->Output())->HasFixedPolicy() ||
+         !LUnallocated::cast(summary->Output())->HasRegisterPolicy());
+  for (int i = 0; i < summary->InputCount(); i++) {
+    ASSERT(LUnallocated::cast(summary->InputAt(i))->HasFixedPolicy() ||
+           LUnallocated::cast(summary->InputAt(i))->IsUsedAtStart() ||
+           !LUnallocated::cast(summary->InputAt(i))->HasRegisterPolicy());
+  }
+  for (int i = 0; i < summary->TempCount(); i++) {
+    ASSERT(LUnallocated::cast(summary->TempAt(i))->HasFixedPolicy() ||
+           !LUnallocated::cast(summary->TempAt(i))->HasRegisterPolicy());
+  }
+#endif
+  summary->MarkAsCall();
+}
+
+
+void LAllocator::MarkAsSaveDoubles() {
+  current_summary()->MarkAsSaveDoubles();
 }
 
 

deps/v8/src/lithium-allocator.h

@@ -30,6 +30,7 @@
 
 #include "v8.h"
 
+#include "data-flow.h"
 #include "zone.h"
 
 namespace v8 {
@@ -49,7 +50,6 @@ class LArgument;
 class LChunk;
 class LConstantOperand;
 class LGap;
-class LInstruction;
 class LParallelMove;
 class LPointerMap;
 class LStackSlot;
@@ -204,7 +204,6 @@ class LUnallocated: public LOperand {
     MUST_HAVE_REGISTER,
     WRITABLE_REGISTER,
     SAME_AS_FIRST_INPUT,
-    SAME_AS_ANY_INPUT,
     IGNORE
   };
 
@@ -275,7 +274,7 @@ class LUnallocated: public LOperand {
     return policy() == WRITABLE_REGISTER || policy() == MUST_HAVE_REGISTER;
   }
   bool HasSameAsInputPolicy() const {
-    return policy() == SAME_AS_FIRST_INPUT || policy() == SAME_AS_ANY_INPUT;
+    return policy() == SAME_AS_FIRST_INPUT;
   }
   Policy policy() const { return PolicyField::decode(value_); }
   void set_policy(Policy policy) {
@@ -482,7 +481,11 @@ class LDoubleRegister: public LOperand {
 class InstructionSummary: public ZoneObject {
  public:
   InstructionSummary()
-      : output_operand_(NULL), input_count_(0), operands_(4), is_call_(false) {}
+      : output_operand_(NULL),
+        input_count_(0),
+        operands_(4),
+        is_call_(false),
+        is_save_doubles_(false) {}
 
   // Output operands.
   LOperand* Output() const { return output_operand_; }
@@ -510,11 +513,15 @@ class InstructionSummary: public ZoneObject {
   void MarkAsCall() { is_call_ = true; }
   bool IsCall() const { return is_call_; }
 
+  void MarkAsSaveDoubles() { is_save_doubles_ = true; }
+  bool IsSaveDoubles() const { return is_save_doubles_; }
+
  private:
   LOperand* output_operand_;
   int input_count_;
   ZoneList<LOperand*> operands_;
   bool is_call_;
+  bool is_save_doubles_;
 };
 
 // Representation of the non-empty interval [start,end[.
@@ -698,6 +705,7 @@ class LiveRange: public ZoneObject {
   bool HasAllocatedSpillOperand() const {
     return spill_operand_ != NULL && !spill_operand_->IsUnallocated();
   }
+
   LOperand* GetSpillOperand() const { return spill_operand_; }
   void SetSpillOperand(LOperand* operand) {
     ASSERT(!operand->IsUnallocated());
@@ -715,7 +723,6 @@ class LiveRange: public ZoneObject {
   bool Covers(LifetimePosition position);
   LifetimePosition FirstIntersection(LiveRange* other);
 
-
   // Add a new interval or a new use position to this live range.
   void EnsureInterval(LifetimePosition start, LifetimePosition end);
   void AddUseInterval(LifetimePosition start, LifetimePosition end);
@@ -754,6 +761,40 @@ class LiveRange: public ZoneObject {
 };
 
 
+class GrowableBitVector BASE_EMBEDDED {
+ public:
+  GrowableBitVector() : bits_(NULL) { }
+
+  bool Contains(int value) const {
+    if (!InBitsRange(value)) return false;
+    return bits_->Contains(value);
+  }
+
+  void Add(int value) {
+    EnsureCapacity(value);
+    bits_->Add(value);
+  }
+
+ private:
+  static const int kInitialLength = 1024;
+
+  bool InBitsRange(int value) const {
+    return bits_ != NULL && bits_->length() > value;
+  }
+
+  void EnsureCapacity(int value) {
+    if (InBitsRange(value)) return;
+    int new_length = bits_ == NULL ? kInitialLength : bits_->length();
+    while (new_length <= value) new_length *= 2;
+    BitVector* new_bits = new BitVector(new_length);
+    if (bits_ != NULL) new_bits->CopyFrom(*bits_);
+    bits_ = new_bits;
+  }
+
+  BitVector* bits_;
+};
+
+
 class LAllocator BASE_EMBEDDED {
  public:
   explicit LAllocator(int first_virtual_register, HGraph* graph)
@@ -770,6 +811,7 @@ class LAllocator BASE_EMBEDDED {
         inactive_live_ranges_(8),
         reusable_slots_(8),
         next_virtual_register_(first_virtual_register),
+        first_artificial_register_(first_virtual_register),
         mode_(NONE),
         num_registers_(-1),
         graph_(graph),
@@ -789,6 +831,9 @@ class LAllocator BASE_EMBEDDED {
   // Marks the current instruction as a call.
   void MarkAsCall();
 
+  // Marks the current instruction as requiring saving double registers.
+  void MarkAsSaveDoubles();
+
   // Checks whether the value of a given virtual register is tagged.
   bool HasTaggedValue(int virtual_register) const;
 
@@ -972,6 +1017,8 @@ class LAllocator BASE_EMBEDDED {
 
   // Next virtual register number to be assigned to temporaries.
   int next_virtual_register_;
+  int first_artificial_register_;
+  GrowableBitVector double_artificial_registers_;
 
   RegisterKind mode_;
   int num_registers_;

deps/v8/src/lithium.cc

@@ -0,0 +1,93 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "lithium.h"
+
+namespace v8 {
+namespace internal {
+
+bool LParallelMove::IsRedundant() const {
+  for (int i = 0; i < move_operands_.length(); ++i) {
+    if (!move_operands_[i].IsRedundant()) return false;
+  }
+  return true;
+}
+
+
+void LParallelMove::PrintDataTo(StringStream* stream) const {
+  for (int i = move_operands_.length() - 1; i >= 0; --i) {
+    if (!move_operands_[i].IsEliminated()) {
+      LOperand* from = move_operands_[i].from();
+      LOperand* to = move_operands_[i].to();
+      if (from->Equals(to)) {
+        to->PrintTo(stream);
+      } else {
+        to->PrintTo(stream);
+        stream->Add(" = ");
+        from->PrintTo(stream);
+      }
+      stream->Add("; ");
+    }
+  }
+}
+
+
+void LEnvironment::PrintTo(StringStream* stream) {
+  stream->Add("[id=%d|", ast_id());
+  stream->Add("[parameters=%d|", parameter_count());
+  stream->Add("[arguments_stack_height=%d|", arguments_stack_height());
+  for (int i = 0; i < values_.length(); ++i) {
+    if (i != 0) stream->Add(";");
+    if (values_[i] == NULL) {
+      stream->Add("[hole]");
+    } else {
+      values_[i]->PrintTo(stream);
+    }
+  }
+  stream->Add("]");
+}
+
+
+void LPointerMap::RecordPointer(LOperand* op) {
+  // Do not record arguments as pointers.
+  if (op->IsStackSlot() && op->index() < 0) return;
+  ASSERT(!op->IsDoubleRegister() && !op->IsDoubleStackSlot());
+  pointer_operands_.Add(op);
+}
+
+
+void LPointerMap::PrintTo(StringStream* stream) {
+  stream->Add("{");
+  for (int i = 0; i < pointer_operands_.length(); ++i) {
+    if (i != 0) stream->Add(";");
+    pointer_operands_[i]->PrintTo(stream);
+  }
+  stream->Add("} @%d", position());
+}
+
+
+} }  // namespace v8::internal

deps/v8/src/lithium.h

@@ -0,0 +1,169 @@
+// Copyright 2011 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_LITHIUM_H_
+#define V8_LITHIUM_H_
+
+#include "hydrogen.h"
+#include "lithium-allocator.h"
+#include "safepoint-table.h"
+
+namespace v8 {
+namespace internal {
+
+class LCodeGen;
+class Translation;
+
+class LParallelMove : public ZoneObject {
+ public:
+  LParallelMove() : move_operands_(4) { }
+
+  void AddMove(LOperand* from, LOperand* to) {
+    move_operands_.Add(LMoveOperands(from, to));
+  }
+
+  bool IsRedundant() const;
+
+  const ZoneList<LMoveOperands>* move_operands() const {
+    return &move_operands_;
+  }
+
+  void PrintDataTo(StringStream* stream) const;
+
+ private:
+  ZoneList<LMoveOperands> move_operands_;
+};
+
+
+class LPointerMap: public ZoneObject {
+ public:
+  explicit LPointerMap(int position)
+      : pointer_operands_(8), position_(position), lithium_position_(-1) { }
+
+  const ZoneList<LOperand*>* operands() const { return &pointer_operands_; }
+  int position() const { return position_; }
+  int lithium_position() const { return lithium_position_; }
+
+  void set_lithium_position(int pos) {
+    ASSERT(lithium_position_ == -1);
+    lithium_position_ = pos;
+  }
+
+  void RecordPointer(LOperand* op);
+  void PrintTo(StringStream* stream);
+
+ private:
+  ZoneList<LOperand*> pointer_operands_;
+  int position_;
+  int lithium_position_;
+};
+
+
+class LEnvironment: public ZoneObject {
+ public:
+  LEnvironment(Handle<JSFunction> closure,
+               int ast_id,
+               int parameter_count,
+               int argument_count,
+               int value_count,
+               LEnvironment* outer)
+      : closure_(closure),
+        arguments_stack_height_(argument_count),
+        deoptimization_index_(Safepoint::kNoDeoptimizationIndex),
+        translation_index_(-1),
+        ast_id_(ast_id),
+        parameter_count_(parameter_count),
+        values_(value_count),
+        representations_(value_count),
+        spilled_registers_(NULL),
+        spilled_double_registers_(NULL),
+        outer_(outer) {
+  }
+
+  Handle<JSFunction> closure() const { return closure_; }
+  int arguments_stack_height() const { return arguments_stack_height_; }
+  int deoptimization_index() const { return deoptimization_index_; }
+  int translation_index() const { return translation_index_; }
+  int ast_id() const { return ast_id_; }
+  int parameter_count() const { return parameter_count_; }
+  LOperand** spilled_registers() const { return spilled_registers_; }
+  LOperand** spilled_double_registers() const {
+    return spilled_double_registers_;
+  }
+  const ZoneList<LOperand*>* values() const { return &values_; }
+  LEnvironment* outer() const { return outer_; }
+
+  void AddValue(LOperand* operand, Representation representation) {
+    values_.Add(operand);
+    representations_.Add(representation);
+  }
+
+  bool HasTaggedValueAt(int index) const {
+    return representations_[index].IsTagged();
+  }
+
+  void Register(int deoptimization_index, int translation_index) {
+    ASSERT(!HasBeenRegistered());
+    deoptimization_index_ = deoptimization_index;
+    translation_index_ = translation_index;
+  }
+  bool HasBeenRegistered() const {
+    return deoptimization_index_ != Safepoint::kNoDeoptimizationIndex;
+  }
+
+  void SetSpilledRegisters(LOperand** registers,
+                           LOperand** double_registers) {
+    spilled_registers_ = registers;
+    spilled_double_registers_ = double_registers;
+  }
+
+  void PrintTo(StringStream* stream);
+
+ private:
+  Handle<JSFunction> closure_;
+  int arguments_stack_height_;
+  int deoptimization_index_;
+  int translation_index_;
+  int ast_id_;
+  int parameter_count_;
+  ZoneList<LOperand*> values_;
+  ZoneList<Representation> representations_;
+
+  // Allocation index indexed arrays of spill slot operands for registers
+  // that are also in spill slots at an OSR entry.  NULL for environments
+  // that do not correspond to an OSR entry.
+  LOperand** spilled_registers_;
+  LOperand** spilled_double_registers_;
+
+  LEnvironment* outer_;
+
+  friend class LCodegen;
+};
+
+} }  // namespace v8::internal
+
+#endif  // V8_LITHIUM_H_

deps/v8/src/liveedit-debugger.js

@@ -144,8 +144,8 @@ Debug.LiveEdit = new function() {
           replace_code_list[i].live_shared_function_infos;
 
       if (live_shared_function_infos) {
-        for (var i = 0; i < live_shared_function_infos.length; i++) {
-          replaced_function_infos.push(live_shared_function_infos[i]);
+        for (var j = 0; j < live_shared_function_infos.length; j++) {
+          replaced_function_infos.push(live_shared_function_infos[j]);
         }
       }
     }
@@ -980,15 +980,15 @@ Debug.LiveEdit = new function() {
   // LiveEdit main entry point: changes a script text to a new string.
   function SetScriptSource(script, new_source, preview_only, change_log) {
     var old_source = script.source;
-    var diff = CompareStringsLinewise(old_source, new_source);
+    var diff = CompareStrings(old_source, new_source);
     return ApplyPatchMultiChunk(script, diff, new_source, preview_only,
         change_log);
   }
   // Function is public.
   this.SetScriptSource = SetScriptSource;
 
-  function CompareStringsLinewise(s1, s2) {
-    return %LiveEditCompareStringsLinewise(s1, s2);
+  function CompareStrings(s1, s2) {
+    return %LiveEditCompareStrings(s1, s2);
   }
 
   // Applies the change to the script.
@@ -1076,7 +1076,7 @@ Debug.LiveEdit = new function() {
   // Functions are public for tests.
   this.TestApi = {
     PosTranslator: PosTranslator,
-    CompareStringsLinewise: CompareStringsLinewise,
+    CompareStrings: CompareStrings,
     ApplySingleChunkPatch: ApplySingleChunkPatch
   }
 }

deps/v8/src/liveedit.cc

@@ -275,6 +275,82 @@ static bool CompareSubstrings(Handle<String> s1, int pos1,
 }
 
 
+// A helper class that writes chunk numbers into JSArray.
+// Each chunk is stored as 3 array elements: (pos1_begin, pos1_end, pos2_end).
+class CompareOutputArrayWriter {
+ public:
+  CompareOutputArrayWriter()
+      : array_(Factory::NewJSArray(10)), current_size_(0) {}
+
+  Handle<JSArray> GetResult() {
+    return array_;
+  }
+
+  void WriteChunk(int char_pos1, int char_pos2, int char_len1, int char_len2) {
+    SetElement(array_, current_size_, Handle<Object>(Smi::FromInt(char_pos1)));
+    SetElement(array_, current_size_ + 1,
+               Handle<Object>(Smi::FromInt(char_pos1 + char_len1)));
+    SetElement(array_, current_size_ + 2,
+               Handle<Object>(Smi::FromInt(char_pos2 + char_len2)));
+    current_size_ += 3;
+  }
+
+ private:
+  Handle<JSArray> array_;
+  int current_size_;
+};
+
+
+// Represents 2 strings as 2 arrays of tokens.
+// TODO(LiveEdit): Currently it's actually an array of charactres.
+//     Make array of tokens instead.
+class TokensCompareInput : public Comparator::Input {
+ public:
+  TokensCompareInput(Handle<String> s1, int offset1, int len1,
+                       Handle<String> s2, int offset2, int len2)
+      : s1_(s1), offset1_(offset1), len1_(len1),
+        s2_(s2), offset2_(offset2), len2_(len2) {
+  }
+  virtual int getLength1() {
+    return len1_;
+  }
+  virtual int getLength2() {
+    return len2_;
+  }
+  bool equals(int index1, int index2) {
+    return s1_->Get(offset1_ + index1) == s2_->Get(offset2_ + index2);
+  }
+
+ private:
+  Handle<String> s1_;
+  int offset1_;
+  int len1_;
+  Handle<String> s2_;
+  int offset2_;
+  int len2_;
+};
+
+
+// Stores compare result in JSArray. Converts substring positions
+// to absolute positions.
+class TokensCompareOutput : public Comparator::Output {
+ public:
+  TokensCompareOutput(CompareOutputArrayWriter* array_writer,
+                      int offset1, int offset2)
+        : array_writer_(array_writer), offset1_(offset1), offset2_(offset2) {
+  }
+
+  void AddChunk(int pos1, int pos2, int len1, int len2) {
+    array_writer_->WriteChunk(pos1 + offset1_, pos2 + offset2_, len1, len2);
+  }
+
+ private:
+  CompareOutputArrayWriter* array_writer_;
+  int offset1_;
+  int offset2_;
+};
+
+
 // Wraps raw n-elements line_ends array as a list of n+1 lines. The last line
 // never has terminating new line character.
 class LineEndsWrapper {
@@ -350,13 +426,14 @@ class LineArrayCompareInput : public Comparator::Input {
 };
 
 
-// Stores compare result in JSArray. Each chunk is stored as 3 array elements:
-// (pos1_begin, pos1_end, pos2_end).
-class LineArrayCompareOutput : public Comparator::Output {
+// Stores compare result in JSArray. For each chunk tries to conduct
+// a fine-grained nested diff token-wise.
+class TokenizingLineArrayCompareOutput : public Comparator::Output {
  public:
-  LineArrayCompareOutput(LineEndsWrapper line_ends1, LineEndsWrapper line_ends2)
-      : array_(Factory::NewJSArray(10)), current_size_(0),
-        line_ends1_(line_ends1), line_ends2_(line_ends2) {
+  TokenizingLineArrayCompareOutput(LineEndsWrapper line_ends1,
+                                   LineEndsWrapper line_ends2,
+                                   Handle<String> s1, Handle<String> s2)
+      : line_ends1_(line_ends1), line_ends2_(line_ends2), s1_(s1), s2_(s2) {
   }
 
   void AddChunk(int line_pos1, int line_pos2, int line_len1, int line_len2) {
@@ -365,33 +442,43 @@ class LineArrayCompareOutput : public Comparator::Output {
     int char_len1 = line_ends1_.GetLineStart(line_pos1 + line_len1) - char_pos1;
     int char_len2 = line_ends2_.GetLineStart(line_pos2 + line_len2) - char_pos2;
 
-    SetElement(array_, current_size_, Handle<Object>(Smi::FromInt(char_pos1)));
-    SetElement(array_, current_size_ + 1,
-               Handle<Object>(Smi::FromInt(char_pos1 + char_len1)));
-    SetElement(array_, current_size_ + 2,
-               Handle<Object>(Smi::FromInt(char_pos2 + char_len2)));
-    current_size_ += 3;
+    if (char_len1 < CHUNK_LEN_LIMIT && char_len2 < CHUNK_LEN_LIMIT) {
+      // Chunk is small enough to conduct a nested token-level diff.
+      HandleScope subTaskScope;
+
+      TokensCompareInput tokens_input(s1_, char_pos1, char_len1,
+                                      s2_, char_pos2, char_len2);
+      TokensCompareOutput tokens_output(&array_writer_, char_pos1,
+                                          char_pos2);
+
+      Comparator::CalculateDifference(&tokens_input, &tokens_output);
+    } else {
+      array_writer_.WriteChunk(char_pos1, char_pos2, char_len1, char_len2);
+    }
   }
 
   Handle<JSArray> GetResult() {
-    return array_;
+    return array_writer_.GetResult();
   }
 
  private:
-  Handle<JSArray> array_;
-  int current_size_;
+  static const int CHUNK_LEN_LIMIT = 800;
+
+  CompareOutputArrayWriter array_writer_;
   LineEndsWrapper line_ends1_;
   LineEndsWrapper line_ends2_;
+  Handle<String> s1_;
+  Handle<String> s2_;
 };
 
 
-Handle<JSArray> LiveEdit::CompareStringsLinewise(Handle<String> s1,
-                                                 Handle<String> s2) {
+Handle<JSArray> LiveEdit::CompareStrings(Handle<String> s1,
+                                         Handle<String> s2) {
   LineEndsWrapper line_ends1(s1);
   LineEndsWrapper line_ends2(s2);
 
   LineArrayCompareInput input(s1, s2, line_ends1, line_ends2);
-  LineArrayCompareOutput output(line_ends1, line_ends2);
+  TokenizingLineArrayCompareOutput output(line_ends1, line_ends2, s1, s2);
 
   Comparator::CalculateDifference(&input, &output);
 

deps/v8/src/liveedit.h

@@ -126,10 +126,11 @@ class LiveEdit : AllStatic {
     FUNCTION_REPLACED_ON_ACTIVE_STACK = 5
   };
 
-  // Compares 2 strings line-by-line and returns diff in form of array of
-  // triplets (pos1, pos1_end, pos2_end) describing list of diff chunks.
-  static Handle<JSArray> CompareStringsLinewise(Handle<String> s1,
-                                                Handle<String> s2);
+  // Compares 2 strings line-by-line, then token-wise and returns diff in form
+  // of array of triplets (pos1, pos1_end, pos2_end) describing list
+  // of diff chunks.
+  static Handle<JSArray> CompareStrings(Handle<String> s1,
+                                        Handle<String> s2);
 };
 
 

deps/v8/src/log.cc

@@ -276,7 +276,8 @@ void SlidingStateWindow::AddState(StateTag state) {
 // Profiler implementation.
 //
 Profiler::Profiler()
-    : head_(0),
+    : Thread("v8:Profiler"),
+      head_(0),
       tail_(0),
       overflow_(false),
       buffer_semaphore_(OS::CreateSemaphore(0)),

deps/v8/src/macros.py

@@ -120,11 +120,13 @@ macro IS_SPEC_OBJECT(arg) = (%_IsSpecObject(arg));
 
 # Inline macros. Use %IS_VAR to make sure arg is evaluated only once.
 macro NUMBER_IS_NAN(arg) = (!%_IsSmi(%IS_VAR(arg)) && !(arg == arg));
+macro NUMBER_IS_FINITE(arg) = (%_IsSmi(%IS_VAR(arg)) || arg - arg == 0);
 macro TO_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToInteger(ToNumber(arg)));
 macro TO_INTEGER_MAP_MINUS_ZERO(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToIntegerMapMinusZero(ToNumber(arg)));
 macro TO_INT32(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : (arg >> 0));
 macro TO_UINT32(arg) = (arg >>> 0);
 macro TO_STRING_INLINE(arg) = (IS_STRING(%IS_VAR(arg)) ? arg : NonStringToString(arg));
+macro TO_NUMBER_INLINE(arg) = (IS_NUMBER(%IS_VAR(arg)) ? arg : NonNumberToNumber(arg));
 
 
 # Macros implemented in Python.

deps/v8/src/math.js

@@ -44,26 +44,26 @@ $Math.__proto__ = global.Object.prototype;
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   if (%_IsSmi(x)) return x >= 0 ? x : -x;
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   if (x === 0) return 0;  // To handle -0.
   return x > 0 ? x : -x;
 }
 
 // ECMA 262 - 15.8.2.2
 function MathAcos(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_acos(x);
 }
 
 // ECMA 262 - 15.8.2.3
 function MathAsin(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_asin(x);
 }
 
 // ECMA 262 - 15.8.2.4
 function MathAtan(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_atan(x);
 }
 
@@ -71,32 +71,32 @@ function MathAtan(x) {
 // The naming of y and x matches the spec, as does the order in which
 // ToNumber (valueOf) is called.
 function MathAtan2(y, x) {
-  if (!IS_NUMBER(y)) y = ToNumber(y);
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(y)) y = NonNumberToNumber(y);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_atan2(y, x);
 }
 
 // ECMA 262 - 15.8.2.6
 function MathCeil(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_ceil(x);
 }
 
 // ECMA 262 - 15.8.2.7
 function MathCos(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %_MathCos(x);
 }
 
 // ECMA 262 - 15.8.2.8
 function MathExp(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_exp(x);
 }
 
 // ECMA 262 - 15.8.2.9
 function MathFloor(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   // It's more common to call this with a positive number that's out
   // of range than negative numbers; check the upper bound first.
   if (x < 0x80000000 && x > 0) {
@@ -112,7 +112,7 @@ function MathFloor(x) {
 
 // ECMA 262 - 15.8.2.10
 function MathLog(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %_MathLog(x);
 }
 
@@ -123,11 +123,11 @@ function MathMax(arg1, arg2) {  // length == 2
     return -1/0;  // Compiler constant-folds this to -Infinity.
   }
   var r = arg1;
-  if (!IS_NUMBER(r)) r = ToNumber(r);
+  if (!IS_NUMBER(r)) r = NonNumberToNumber(r);
   if (NUMBER_IS_NAN(r)) return r;
   for (var i = 1; i < length; i++) {
     var n = %_Arguments(i);
-    if (!IS_NUMBER(n)) n = ToNumber(n);
+    if (!IS_NUMBER(n)) n = NonNumberToNumber(n);
     if (NUMBER_IS_NAN(n)) return n;
     // Make sure +0 is considered greater than -0.  -0 is never a Smi, +0 can be
     // a Smi or heap number.
@@ -143,11 +143,11 @@ function MathMin(arg1, arg2) {  // length == 2
     return 1/0;  // Compiler constant-folds this to Infinity.
   }
   var r = arg1;
-  if (!IS_NUMBER(r)) r = ToNumber(r);
+  if (!IS_NUMBER(r)) r = NonNumberToNumber(r);
   if (NUMBER_IS_NAN(r)) return r;
   for (var i = 1; i < length; i++) {
     var n = %_Arguments(i);
-    if (!IS_NUMBER(n)) n = ToNumber(n);
+    if (!IS_NUMBER(n)) n = NonNumberToNumber(n);
     if (NUMBER_IS_NAN(n)) return n;
     // Make sure -0 is considered less than +0.  -0 is never a Smi, +0 can b a
     // Smi or a heap number.
@@ -158,8 +158,8 @@ function MathMin(arg1, arg2) {  // length == 2
 
 // ECMA 262 - 15.8.2.13
 function MathPow(x, y) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
-  if (!IS_NUMBER(y)) y = ToNumber(y);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
+  if (!IS_NUMBER(y)) y = NonNumberToNumber(y);
   return %_MathPow(x, y);
 }
 
@@ -170,25 +170,25 @@ function MathRandom() {
 
 // ECMA 262 - 15.8.2.15
 function MathRound(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %RoundNumber(x);
 }
 
 // ECMA 262 - 15.8.2.16
 function MathSin(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %_MathSin(x);
 }
 
 // ECMA 262 - 15.8.2.17
 function MathSqrt(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %_MathSqrt(x);
 }
 
 // ECMA 262 - 15.8.2.18
 function MathTan(x) {
-  if (!IS_NUMBER(x)) x = ToNumber(x);
+  if (!IS_NUMBER(x)) x = NonNumberToNumber(x);
   return %Math_tan(x);
 }