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

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// Copyright 2006-2009 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 "v8.h"
#include "ic-inl.h"
#include "codegen-inl.h"
#include "stub-cache.h"
namespace v8 {
namespace internal {
#define __ ACCESS_MASM(masm)
static void ProbeTable(MacroAssembler* masm,
Code::Flags flags,
StubCache::Table table,
Register name,
Register offset,
Register extra) {
ExternalReference key_offset(SCTableReference::keyReference(table));
ExternalReference value_offset(SCTableReference::valueReference(table));
Label miss;
if (extra.is_valid()) {
// Get the code entry from the cache.
__ mov(extra, Operand::StaticArray(offset, times_2, value_offset));
// Check that the key in the entry matches the name.
__ cmp(name, Operand::StaticArray(offset, times_2, key_offset));
__ j(not_equal, &miss, not_taken);
// Check that the flags match what we're looking for.
__ mov(offset, FieldOperand(extra, Code::kFlagsOffset));
__ and_(offset, ~Code::kFlagsNotUsedInLookup);
__ cmp(offset, flags);
__ j(not_equal, &miss);
// Jump to the first instruction in the code stub.
__ add(Operand(extra), Immediate(Code::kHeaderSize - kHeapObjectTag));
__ jmp(Operand(extra));
__ bind(&miss);
} else {
// Save the offset on the stack.
__ push(offset);
// Check that the key in the entry matches the name.
__ cmp(name, Operand::StaticArray(offset, times_2, key_offset));
__ j(not_equal, &miss, not_taken);
// Get the code entry from the cache.
__ mov(offset, Operand::StaticArray(offset, times_2, value_offset));
// Check that the flags match what we're looking for.
__ mov(offset, FieldOperand(offset, Code::kFlagsOffset));
__ and_(offset, ~Code::kFlagsNotUsedInLookup);
__ cmp(offset, flags);
__ j(not_equal, &miss);
// Restore offset and re-load code entry from cache.
__ pop(offset);
__ mov(offset, Operand::StaticArray(offset, times_2, value_offset));
// Jump to the first instruction in the code stub.
__ add(Operand(offset), Immediate(Code::kHeaderSize - kHeapObjectTag));
__ jmp(Operand(offset));
// Pop at miss.
__ bind(&miss);
__ pop(offset);
}
}
void StubCache::GenerateProbe(MacroAssembler* masm,
Code::Flags flags,
Register receiver,
Register name,
Register scratch,
Register extra) {
Label miss;
// Make sure that code is valid. The shifting code relies on the
// entry size being 8.
ASSERT(sizeof(Entry) == 8);
// Make sure the flags does not name a specific type.
ASSERT(Code::ExtractTypeFromFlags(flags) == 0);
// Make sure that there are no register conflicts.
ASSERT(!scratch.is(receiver));
ASSERT(!scratch.is(name));
ASSERT(!extra.is(receiver));
ASSERT(!extra.is(name));
ASSERT(!extra.is(scratch));
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
// Get the map of the receiver and compute the hash.
__ mov(scratch, FieldOperand(name, String::kHashFieldOffset));
__ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
__ xor_(scratch, flags);
__ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize);
// Probe the primary table.
ProbeTable(masm, flags, kPrimary, name, scratch, extra);
// Primary miss: Compute hash for secondary probe.
__ mov(scratch, FieldOperand(name, String::kHashFieldOffset));
__ add(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
__ xor_(scratch, flags);
__ and_(scratch, (kPrimaryTableSize - 1) << kHeapObjectTagSize);
__ sub(scratch, Operand(name));
__ add(Operand(scratch), Immediate(flags));
__ and_(scratch, (kSecondaryTableSize - 1) << kHeapObjectTagSize);
// Probe the secondary table.
ProbeTable(masm, flags, kSecondary, name, scratch, extra);
// Cache miss: Fall-through and let caller handle the miss by
// entering the runtime system.
__ bind(&miss);
}
void StubCompiler::GenerateLoadGlobalFunctionPrototype(MacroAssembler* masm,
int index,
Register prototype) {
// Load the global or builtins object from the current context.
__ mov(prototype, Operand(esi, Context::SlotOffset(Context::GLOBAL_INDEX)));
// Load the global context from the global or builtins object.
__ mov(prototype,
FieldOperand(prototype, GlobalObject::kGlobalContextOffset));
// Load the function from the global context.
__ mov(prototype, Operand(prototype, Context::SlotOffset(index)));
// Load the initial map. The global functions all have initial maps.
__ mov(prototype,
FieldOperand(prototype, JSFunction::kPrototypeOrInitialMapOffset));
// Load the prototype from the initial map.
__ mov(prototype, FieldOperand(prototype, Map::kPrototypeOffset));
}
void StubCompiler::GenerateLoadArrayLength(MacroAssembler* masm,
Register receiver,
Register scratch,
Label* miss_label) {
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss_label, not_taken);
// Check that the object is a JS array.
__ CmpObjectType(receiver, JS_ARRAY_TYPE, scratch);
__ j(not_equal, miss_label, not_taken);
// Load length directly from the JS array.
__ mov(eax, FieldOperand(receiver, JSArray::kLengthOffset));
__ ret(0);
}
// Generate code to check if an object is a string. If the object is
// a string, the map's instance type is left in the scratch register.
static void GenerateStringCheck(MacroAssembler* masm,
Register receiver,
Register scratch,
Label* smi,
Label* non_string_object) {
// Check that the object isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, smi, not_taken);
// Check that the object is a string.
__ mov(scratch, FieldOperand(receiver, HeapObject::kMapOffset));
__ movzx_b(scratch, FieldOperand(scratch, Map::kInstanceTypeOffset));
ASSERT(kNotStringTag != 0);
__ test(scratch, Immediate(kNotStringTag));
__ j(not_zero, non_string_object, not_taken);
}
void StubCompiler::GenerateLoadStringLength(MacroAssembler* masm,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss) {
Label check_wrapper;
// Check if the object is a string leaving the instance type in the
// scratch register.
GenerateStringCheck(masm, receiver, scratch1, miss, &check_wrapper);
// Load length from the string and convert to a smi.
__ mov(eax, FieldOperand(receiver, String::kLengthOffset));
__ SmiTag(eax);
__ ret(0);
// Check if the object is a JSValue wrapper.
__ bind(&check_wrapper);
__ cmp(scratch1, JS_VALUE_TYPE);
__ j(not_equal, miss, not_taken);
// Check if the wrapped value is a string and load the length
// directly if it is.
__ mov(scratch2, FieldOperand(receiver, JSValue::kValueOffset));
GenerateStringCheck(masm, scratch2, scratch1, miss, miss);
__ mov(eax, FieldOperand(scratch2, String::kLengthOffset));
__ SmiTag(eax);
__ ret(0);
}
void StubCompiler::GenerateLoadFunctionPrototype(MacroAssembler* masm,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss_label) {
__ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
__ mov(eax, Operand(scratch1));
__ ret(0);
}
// Load a fast property out of a holder object (src). In-object properties
// are loaded directly otherwise the property is loaded from the properties
// fixed array.
void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
Register dst, Register src,
JSObject* holder, int index) {
// Adjust for the number of properties stored in the holder.
index -= holder->map()->inobject_properties();
if (index < 0) {
// Get the property straight out of the holder.
int offset = holder->map()->instance_size() + (index * kPointerSize);
__ mov(dst, FieldOperand(src, offset));
} else {
// Calculate the offset into the properties array.
int offset = index * kPointerSize + FixedArray::kHeaderSize;
__ mov(dst, FieldOperand(src, JSObject::kPropertiesOffset));
__ mov(dst, FieldOperand(dst, offset));
}
}
static void PushInterceptorArguments(MacroAssembler* masm,
Register receiver,
Register holder,
Register name,
JSObject* holder_obj) {
__ push(name);
InterceptorInfo* interceptor = holder_obj->GetNamedInterceptor();
ASSERT(!Heap::InNewSpace(interceptor));
Register scratch = name;
__ mov(scratch, Immediate(Handle<Object>(interceptor)));
__ push(scratch);
__ push(receiver);
__ push(holder);
__ push(FieldOperand(scratch, InterceptorInfo::kDataOffset));
}
static void CompileCallLoadPropertyWithInterceptor(MacroAssembler* masm,
Register receiver,
Register holder,
Register name,
JSObject* holder_obj) {
PushInterceptorArguments(masm, receiver, holder, name, holder_obj);
__ CallExternalReference(
ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptorOnly)),
5);
}
template <class Compiler>
static void CompileLoadInterceptor(Compiler* compiler,
StubCompiler* stub_compiler,
MacroAssembler* masm,
JSObject* object,
JSObject* holder,
String* name,
LookupResult* lookup,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss) {
ASSERT(holder->HasNamedInterceptor());
ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined());
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss, not_taken);
// Check that the maps haven't changed.
Register reg =
stub_compiler->CheckPrototypes(object, receiver, holder,
scratch1, scratch2, name, miss);
if (lookup->IsProperty() && lookup->IsCacheable()) {
compiler->CompileCacheable(masm,
stub_compiler,
receiver,
reg,
scratch1,
scratch2,
holder,
lookup,
name,
miss);
} else {
compiler->CompileRegular(masm,
receiver,
reg,
scratch2,
holder,
miss);
}
}
class LoadInterceptorCompiler BASE_EMBEDDED {
public:
explicit LoadInterceptorCompiler(Register name) : name_(name) {}
void CompileCacheable(MacroAssembler* masm,
StubCompiler* stub_compiler,
Register receiver,
Register holder,
Register scratch1,
Register scratch2,
JSObject* holder_obj,
LookupResult* lookup,
String* name,
Label* miss_label) {
AccessorInfo* callback = NULL;
bool optimize = false;
// So far the most popular follow ups for interceptor loads are FIELD
// and CALLBACKS, so inline only them, other cases may be added
// later.
if (lookup->type() == FIELD) {
optimize = true;
} else if (lookup->type() == CALLBACKS) {
Object* callback_object = lookup->GetCallbackObject();
if (callback_object->IsAccessorInfo()) {
callback = AccessorInfo::cast(callback_object);
optimize = callback->getter() != NULL;
}
}
if (!optimize) {
CompileRegular(masm, receiver, holder, scratch2, holder_obj, miss_label);
return;
}
// Note: starting a frame here makes GC aware of pointers pushed below.
__ EnterInternalFrame();
if (lookup->type() == CALLBACKS) {
__ push(receiver);
}
__ push(holder);
__ push(name_);
CompileCallLoadPropertyWithInterceptor(masm,
receiver,
holder,
name_,
holder_obj);
Label interceptor_failed;
__ cmp(eax, Factory::no_interceptor_result_sentinel());
__ j(equal, &interceptor_failed);
__ LeaveInternalFrame();
__ ret(0);
__ bind(&interceptor_failed);
__ pop(name_);
__ pop(holder);
if (lookup->type() == CALLBACKS) {
__ pop(receiver);
}
__ LeaveInternalFrame();
if (lookup->type() == FIELD) {
holder = stub_compiler->CheckPrototypes(holder_obj, holder,
lookup->holder(), scratch1,
scratch2,
name,
miss_label);
stub_compiler->GenerateFastPropertyLoad(masm, eax,
holder, lookup->holder(),
lookup->GetFieldIndex());
__ ret(0);
} else {
ASSERT(lookup->type() == CALLBACKS);
ASSERT(lookup->GetCallbackObject()->IsAccessorInfo());
ASSERT(callback != NULL);
ASSERT(callback->getter() != NULL);
Label cleanup;
__ pop(scratch2);
__ push(receiver);
__ push(scratch2);
holder = stub_compiler->CheckPrototypes(holder_obj, holder,
lookup->holder(), scratch1,
scratch2,
name,
&cleanup);
__ pop(scratch2); // save old return address
__ push(holder);
__ mov(holder, Immediate(Handle<AccessorInfo>(callback)));
__ push(holder);
__ push(FieldOperand(holder, AccessorInfo::kDataOffset));
__ push(name_);
__ push(scratch2); // restore old return address
ExternalReference ref =
ExternalReference(IC_Utility(IC::kLoadCallbackProperty));
__ TailCallExternalReference(ref, 5, 1);
__ bind(&cleanup);
__ pop(scratch1);
__ pop(scratch2);
__ push(scratch1);
}
}
void CompileRegular(MacroAssembler* masm,
Register receiver,
Register holder,
Register scratch,
JSObject* holder_obj,
Label* miss_label) {
__ pop(scratch); // save old return address
PushInterceptorArguments(masm, receiver, holder, name_, holder_obj);
__ push(scratch); // restore old return address
ExternalReference ref = ExternalReference(
IC_Utility(IC::kLoadPropertyWithInterceptorForLoad));
__ TailCallExternalReference(ref, 5, 1);
}
private:
Register name_;
};
// Holds information about possible function call optimizations.
class CallOptimization BASE_EMBEDDED {
public:
explicit CallOptimization(LookupResult* lookup) {
if (!lookup->IsProperty() || !lookup->IsCacheable() ||
lookup->type() != CONSTANT_FUNCTION) {
Initialize(NULL);
} else {
// We only optimize constant function calls.
Initialize(lookup->GetConstantFunction());
}
}
explicit CallOptimization(JSFunction* function) {
Initialize(function);
}
bool is_constant_call() const {
return constant_function_ != NULL;
}
JSFunction* constant_function() const {
ASSERT(constant_function_ != NULL);
return constant_function_;
}
bool is_simple_api_call() const {
return is_simple_api_call_;
}
FunctionTemplateInfo* expected_receiver_type() const {
ASSERT(is_simple_api_call_);
return expected_receiver_type_;
}
CallHandlerInfo* api_call_info() const {
ASSERT(is_simple_api_call_);
return api_call_info_;
}
// Returns the depth of the object having the expected type in the
// prototype chain between the two arguments.
int GetPrototypeDepthOfExpectedType(JSObject* object,
JSObject* holder) const {
ASSERT(is_simple_api_call_);
if (expected_receiver_type_ == NULL) return 0;
int depth = 0;
while (object != holder) {
if (object->IsInstanceOf(expected_receiver_type_)) return depth;
object = JSObject::cast(object->GetPrototype());
++depth;
}
if (holder->IsInstanceOf(expected_receiver_type_)) return depth;
return kInvalidProtoDepth;
}
private:
void Initialize(JSFunction* function) {
constant_function_ = NULL;
is_simple_api_call_ = false;
expected_receiver_type_ = NULL;
api_call_info_ = NULL;
if (function == NULL || !function->is_compiled()) return;
constant_function_ = function;
AnalyzePossibleApiFunction(function);
}
// Determines whether the given function can be called using the
// fast api call builtin.
void AnalyzePossibleApiFunction(JSFunction* function) {
SharedFunctionInfo* sfi = function->shared();
if (!sfi->IsApiFunction()) return;
FunctionTemplateInfo* info = sfi->get_api_func_data();
// Require a C++ callback.
if (info->call_code()->IsUndefined()) return;
api_call_info_ = CallHandlerInfo::cast(info->call_code());
// Accept signatures that either have no restrictions at all or
// only have restrictions on the receiver.
if (!info->signature()->IsUndefined()) {
SignatureInfo* signature = SignatureInfo::cast(info->signature());
if (!signature->args()->IsUndefined()) return;
if (!signature->receiver()->IsUndefined()) {
expected_receiver_type_ =
FunctionTemplateInfo::cast(signature->receiver());
}
}
is_simple_api_call_ = true;
}
JSFunction* constant_function_;
bool is_simple_api_call_;
FunctionTemplateInfo* expected_receiver_type_;
CallHandlerInfo* api_call_info_;
};
// Reserves space for the extra arguments to FastHandleApiCall in the
// caller's frame.
//
// These arguments are set by CheckPrototypes and GenerateFastApiCall.
static void ReserveSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
// ----------- S t a t e -------------
// -- esp[0] : return address
// -- esp[4] : last argument in the internal frame of the caller
// -----------------------------------
__ pop(scratch);
__ push(Immediate(Smi::FromInt(0)));
__ push(Immediate(Smi::FromInt(0)));
__ push(Immediate(Smi::FromInt(0)));
__ push(Immediate(Smi::FromInt(0)));
__ push(scratch);
}
// Undoes the effects of ReserveSpaceForFastApiCall.
static void FreeSpaceForFastApiCall(MacroAssembler* masm, Register scratch) {
// ----------- S t a t e -------------
// -- esp[0] : return address
// -- esp[4] : last fast api call extra argument
// -- ...
// -- esp[16] : first fast api call extra argument
// -- esp[20] : last argument in the internal frame
// -----------------------------------
__ pop(scratch);
__ add(Operand(esp), Immediate(kPointerSize * 4));
__ push(scratch);
}
// Generates call to FastHandleApiCall builtin.
static void GenerateFastApiCall(MacroAssembler* masm,
const CallOptimization& optimization,
int argc) {
// ----------- S t a t e -------------
// -- esp[0] : return address
// -- esp[4] : object passing the type check
// (last fast api call extra argument,
// set by CheckPrototypes)
// -- esp[8] : api call data
// -- esp[12] : api callback
// -- esp[16] : api function
// (first fast api call extra argument)
// -- esp[20] : last argument
// -- ...
// -- esp[(argc + 5) * 4] : first argument
// -- esp[(argc + 6) * 4] : receiver
// -----------------------------------
// Get the function and setup the context.
JSFunction* function = optimization.constant_function();
__ mov(edi, Immediate(Handle<JSFunction>(function)));
__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
// Pass the additional arguments FastHandleApiCall expects.
__ mov(Operand(esp, 4 * kPointerSize), edi);
bool info_loaded = false;
Object* callback = optimization.api_call_info()->callback();
if (Heap::InNewSpace(callback)) {
info_loaded = true;
__ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
__ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kCallbackOffset));
__ mov(Operand(esp, 3 * kPointerSize), ebx);
} else {
__ mov(Operand(esp, 3 * kPointerSize), Immediate(Handle<Object>(callback)));
}
Object* call_data = optimization.api_call_info()->data();
if (Heap::InNewSpace(call_data)) {
if (!info_loaded) {
__ mov(ecx, Handle<CallHandlerInfo>(optimization.api_call_info()));
}
__ mov(ebx, FieldOperand(ecx, CallHandlerInfo::kDataOffset));
__ mov(Operand(esp, 2 * kPointerSize), ebx);
} else {
__ mov(Operand(esp, 2 * kPointerSize),
Immediate(Handle<Object>(call_data)));
}
// Set the number of arguments.
__ mov(eax, Immediate(argc + 4));
// Jump to the fast api call builtin (tail call).
Handle<Code> code = Handle<Code>(
Builtins::builtin(Builtins::FastHandleApiCall));
ParameterCount expected(0);
__ InvokeCode(code, expected, expected,
RelocInfo::CODE_TARGET, JUMP_FUNCTION);
}
class CallInterceptorCompiler BASE_EMBEDDED {
public:
CallInterceptorCompiler(StubCompiler* stub_compiler,
const ParameterCount& arguments,
Register name)
: stub_compiler_(stub_compiler),
arguments_(arguments),
name_(name) {}
void Compile(MacroAssembler* masm,
JSObject* object,
JSObject* holder,
String* name,
LookupResult* lookup,
Register receiver,
Register scratch1,
Register scratch2,
Label* miss) {
ASSERT(holder->HasNamedInterceptor());
ASSERT(!holder->GetNamedInterceptor()->getter()->IsUndefined());
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss, not_taken);
CallOptimization optimization(lookup);
if (optimization.is_constant_call()) {
CompileCacheable(masm,
object,
receiver,
scratch1,
scratch2,
holder,
lookup,
name,
optimization,
miss);
} else {
CompileRegular(masm,
object,
receiver,
scratch1,
scratch2,
name,
holder,
miss);
}
}
private:
void CompileCacheable(MacroAssembler* masm,
JSObject* object,
Register receiver,
Register scratch1,
Register scratch2,
JSObject* holder_obj,
LookupResult* lookup,
String* name,
const CallOptimization& optimization,
Label* miss_label) {
ASSERT(optimization.is_constant_call());
ASSERT(!lookup->holder()->IsGlobalObject());
int depth1 = kInvalidProtoDepth;
int depth2 = kInvalidProtoDepth;
bool can_do_fast_api_call = false;
if (optimization.is_simple_api_call() &&
!lookup->holder()->IsGlobalObject()) {
depth1 = optimization.GetPrototypeDepthOfExpectedType(object, holder_obj);
if (depth1 == kInvalidProtoDepth) {
depth2 = optimization.GetPrototypeDepthOfExpectedType(holder_obj,
lookup->holder());
}
can_do_fast_api_call = (depth1 != kInvalidProtoDepth) ||
(depth2 != kInvalidProtoDepth);
}
__ IncrementCounter(&Counters::call_const_interceptor, 1);
if (can_do_fast_api_call) {
__ IncrementCounter(&Counters::call_const_interceptor_fast_api, 1);
ReserveSpaceForFastApiCall(masm, scratch1);
}
Label miss_cleanup;
Label* miss = can_do_fast_api_call ? &miss_cleanup : miss_label;
Register holder =
stub_compiler_->CheckPrototypes(object, receiver, holder_obj,
scratch1, scratch2, name,
depth1, miss);
Label regular_invoke;
LoadWithInterceptor(masm, receiver, holder, holder_obj, &regular_invoke);
// Generate code for the failed interceptor case.
// Check the lookup is still valid.
stub_compiler_->CheckPrototypes(holder_obj, receiver,
lookup->holder(),
scratch1, scratch2, name,
depth2, miss);
if (can_do_fast_api_call) {
GenerateFastApiCall(masm, optimization, arguments_.immediate());
} else {
__ InvokeFunction(optimization.constant_function(), arguments_,
JUMP_FUNCTION);
}
if (can_do_fast_api_call) {
__ bind(&miss_cleanup);
FreeSpaceForFastApiCall(masm, scratch1);
__ jmp(miss_label);
}
__ bind(&regular_invoke);
if (can_do_fast_api_call) {
FreeSpaceForFastApiCall(masm, scratch1);
}
}
void CompileRegular(MacroAssembler* masm,
JSObject* object,
Register receiver,
Register scratch1,
Register scratch2,
String* name,
JSObject* holder_obj,
Label* miss_label) {
Register holder =
stub_compiler_->CheckPrototypes(object, receiver, holder_obj,
scratch1, scratch2, name,
miss_label);
__ EnterInternalFrame();
// Save the name_ register across the call.
__ push(name_);
PushInterceptorArguments(masm,
receiver,
holder,
name_,
holder_obj);
__ CallExternalReference(
ExternalReference(
IC_Utility(IC::kLoadPropertyWithInterceptorForCall)),
5);
// Restore the name_ register.
__ pop(name_);
__ LeaveInternalFrame();
}
void LoadWithInterceptor(MacroAssembler* masm,
Register receiver,
Register holder,
JSObject* holder_obj,
Label* interceptor_succeeded) {
__ EnterInternalFrame();
__ push(holder); // Save the holder.
__ push(name_); // Save the name.
CompileCallLoadPropertyWithInterceptor(masm,
receiver,
holder,
name_,
holder_obj);
__ pop(name_); // Restore the name.
__ pop(receiver); // Restore the holder.
__ LeaveInternalFrame();
__ cmp(eax, Factory::no_interceptor_result_sentinel());
__ j(not_equal, interceptor_succeeded);
}
StubCompiler* stub_compiler_;
const ParameterCount& arguments_;
Register name_;
};
void StubCompiler::GenerateLoadMiss(MacroAssembler* masm, Code::Kind kind) {
ASSERT(kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC);
Code* code = NULL;
if (kind == Code::LOAD_IC) {
code = Builtins::builtin(Builtins::LoadIC_Miss);
} else {
code = Builtins::builtin(Builtins::KeyedLoadIC_Miss);
}
Handle<Code> ic(code);
__ jmp(ic, RelocInfo::CODE_TARGET);
}
// Both name_reg and receiver_reg are preserved on jumps to miss_label,
// but may be destroyed if store is successful.
void StubCompiler::GenerateStoreField(MacroAssembler* masm,
JSObject* object,
int index,
Map* transition,
Register receiver_reg,
Register name_reg,
Register scratch,
Label* miss_label) {
// Check that the object isn't a smi.
__ test(receiver_reg, Immediate(kSmiTagMask));
__ j(zero, miss_label, not_taken);
// Check that the map of the object hasn't changed.
__ cmp(FieldOperand(receiver_reg, HeapObject::kMapOffset),
Immediate(Handle<Map>(object->map())));
__ j(not_equal, miss_label, not_taken);
// Perform global security token check if needed.
if (object->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(receiver_reg, scratch, miss_label);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
// Perform map transition for the receiver if necessary.
if ((transition != NULL) && (object->map()->unused_property_fields() == 0)) {
// The properties must be extended before we can store the value.
// We jump to a runtime call that extends the properties array.
__ pop(scratch); // Return address.
__ push(receiver_reg);
__ push(Immediate(Handle<Map>(transition)));
__ push(eax);
__ push(scratch);
__ TailCallExternalReference(
ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage)), 3, 1);
return;
}
if (transition != NULL) {
// Update the map of the object; no write barrier updating is
// needed because the map is never in new space.
__ mov(FieldOperand(receiver_reg, HeapObject::kMapOffset),
Immediate(Handle<Map>(transition)));
}
// Adjust for the number of properties stored in the object. Even in the
// face of a transition we can use the old map here because the size of the
// object and the number of in-object properties is not going to change.
index -= object->map()->inobject_properties();
if (index < 0) {
// Set the property straight into the object.
int offset = object->map()->instance_size() + (index * kPointerSize);
__ mov(FieldOperand(receiver_reg, offset), eax);
// Update the write barrier for the array address.
// Pass the value being stored in the now unused name_reg.
__ mov(name_reg, Operand(eax));
__ RecordWrite(receiver_reg, offset, name_reg, scratch);
} else {
// Write to the properties array.
int offset = index * kPointerSize + FixedArray::kHeaderSize;
// Get the properties array (optimistically).
__ mov(scratch, FieldOperand(receiver_reg, JSObject::kPropertiesOffset));
__ mov(FieldOperand(scratch, offset), eax);
// Update the write barrier for the array address.
// Pass the value being stored in the now unused name_reg.
__ mov(name_reg, Operand(eax));
__ RecordWrite(scratch, offset, name_reg, receiver_reg);
}
// Return the value (register eax).
__ ret(0);
}
#undef __
#define __ ACCESS_MASM(masm())
Register StubCompiler::CheckPrototypes(JSObject* object,
Register object_reg,
JSObject* holder,
Register holder_reg,
Register scratch,
String* name,
int push_at_depth,
Label* miss) {
// Check that the maps haven't changed.
Register result =
masm()->CheckMaps(object, object_reg, holder, holder_reg, scratch,
push_at_depth, miss);
// If we've skipped any global objects, it's not enough to verify
// that their maps haven't changed.
while (object != holder) {
if (object->IsGlobalObject()) {
GlobalObject* global = GlobalObject::cast(object);
Object* probe = global->EnsurePropertyCell(name);
if (probe->IsFailure()) {
set_failure(Failure::cast(probe));
return result;
}
JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(probe);
ASSERT(cell->value()->IsTheHole());
__ mov(scratch, Immediate(Handle<Object>(cell)));
__ cmp(FieldOperand(scratch, JSGlobalPropertyCell::kValueOffset),
Immediate(Factory::the_hole_value()));
__ j(not_equal, miss, not_taken);
}
object = JSObject::cast(object->GetPrototype());
}
// Return the register containing the holder.
return result;
}
void StubCompiler::GenerateLoadField(JSObject* object,
JSObject* holder,
Register receiver,
Register scratch1,
Register scratch2,
int index,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss, not_taken);
// Check the prototype chain.
Register reg =
CheckPrototypes(object, receiver, holder,
scratch1, scratch2, name, miss);
// Get the value from the properties.
GenerateFastPropertyLoad(masm(), eax, reg, holder, index);
__ ret(0);
}
bool StubCompiler::GenerateLoadCallback(JSObject* object,
JSObject* holder,
Register receiver,
Register name_reg,
Register scratch1,
Register scratch2,
AccessorInfo* callback,
String* name,
Label* miss,
Failure** failure) {
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss, not_taken);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder,
scratch1, scratch2, name, miss);
Handle<AccessorInfo> callback_handle(callback);
Register other = reg.is(scratch1) ? scratch2 : scratch1;
__ EnterInternalFrame();
__ PushHandleScope(other);
// Push the stack address where the list of arguments ends
__ mov(other, esp);
__ sub(Operand(other), Immediate(2 * kPointerSize));
__ push(other);
__ push(receiver); // receiver
__ push(reg); // holder
__ mov(other, Immediate(callback_handle));
__ push(FieldOperand(other, AccessorInfo::kDataOffset)); // data
__ push(name_reg); // name
// Save a pointer to where we pushed the arguments pointer.
// This will be passed as the const AccessorInfo& to the C++ callback.
__ mov(eax, esp);
__ add(Operand(eax), Immediate(4 * kPointerSize));
__ mov(ebx, esp);
// Do call through the api.
ASSERT_EQ(5, ApiGetterEntryStub::kStackSpace);
Address getter_address = v8::ToCData<Address>(callback->getter());
ApiFunction fun(getter_address);
ApiGetterEntryStub stub(callback_handle, &fun);
// Emitting a stub call may try to allocate (if the code is not
// already generated). Do not allow the assembler to perform a
// garbage collection but instead return the allocation failure
// object.
Object* result = masm()->TryCallStub(&stub);
if (result->IsFailure()) {
*failure = Failure::cast(result);
return false;
}
// We need to avoid using eax since that now holds the result.
Register tmp = other.is(eax) ? reg : other;
// Emitting PopHandleScope may try to allocate. Do not allow the
// assembler to perform a garbage collection but instead return a
// failure object.
result = masm()->TryPopHandleScope(eax, tmp);
if (result->IsFailure()) {
*failure = Failure::cast(result);
return false;
}
__ LeaveInternalFrame();
__ ret(0);
return true;
}
void StubCompiler::GenerateLoadConstant(JSObject* object,
JSObject* holder,
Register receiver,
Register scratch1,
Register scratch2,
Object* value,
String* name,
Label* miss) {
// Check that the receiver isn't a smi.
__ test(receiver, Immediate(kSmiTagMask));
__ j(zero, miss, not_taken);
// Check that the maps haven't changed.
Register reg =
CheckPrototypes(object, receiver, holder,
scratch1, scratch2, name, miss);
// Return the constant value.
__ mov(eax, Handle<Object>(value));
__ ret(0);
}
void StubCompiler::GenerateLoadInterceptor(JSObject* object,
JSObject* holder,
LookupResult* lookup,
Register receiver,
Register name_reg,
Register scratch1,
Register scratch2,
String* name,
Label* miss) {
LoadInterceptorCompiler compiler(name_reg);
CompileLoadInterceptor(&compiler,
this,
masm(),
object,
holder,
name,
lookup,
receiver,
scratch1,
scratch2,
miss);
}
// TODO(1241006): Avoid having lazy compile stubs specialized by the
// number of arguments. It is not needed anymore.
Object* StubCompiler::CompileLazyCompile(Code::Flags flags) {
// Enter an internal frame.
__ EnterInternalFrame();
// Push a copy of the function onto the stack.
__ push(edi);
__ push(edi); // function is also the parameter to the runtime call
__ CallRuntime(Runtime::kLazyCompile, 1);
__ pop(edi);
// Tear down temporary frame.
__ LeaveInternalFrame();
// Do a tail-call of the compiled function.
__ lea(ecx, FieldOperand(eax, Code::kHeaderSize));
__ jmp(Operand(ecx));
return GetCodeWithFlags(flags, "LazyCompileStub");
}
Object* CallStubCompiler::CompileCallField(JSObject* object,
JSObject* holder,
int index,
String* name) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
Label miss;
// Get the receiver from the stack.
const int argc = arguments().immediate();
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Check that the receiver isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
// Do the right check and compute the holder register.
Register reg = CheckPrototypes(object, edx, holder, ebx, eax, name, &miss);
GenerateFastPropertyLoad(masm(), edi, reg, holder, index);
// Check that the function really is a function.
__ test(edi, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
__ CmpObjectType(edi, JS_FUNCTION_TYPE, ebx);
__ j(not_equal, &miss, not_taken);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
__ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
__ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
}
// Invoke the function.
__ InvokeFunction(edi, arguments(), JUMP_FUNCTION);
// Handle call cache miss.
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(FIELD, name);
}
Object* CallStubCompiler::CompileArrayPushCall(Object* object,
JSObject* holder,
JSFunction* function,
String* name,
CheckType check) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
ASSERT(check == RECEIVER_MAP_CHECK);
Label miss;
// Get the receiver from the stack.
const int argc = arguments().immediate();
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Check that the receiver isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss);
CheckPrototypes(JSObject::cast(object), edx,
holder, ebx,
eax, name, &miss);
if (argc == 0) {
// Noop, return the length.
__ mov(eax, FieldOperand(edx, JSArray::kLengthOffset));
__ ret((argc + 1) * kPointerSize);
} else {
// Get the elements array of the object.
__ mov(ebx, FieldOperand(edx, JSArray::kElementsOffset));
// Check that the elements are in fast mode (not dictionary).
__ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
Immediate(Factory::fixed_array_map()));
__ j(not_equal, &miss);
if (argc == 1) { // Otherwise fall through to call builtin.
Label call_builtin, exit, with_rset_update, attempt_to_grow_elements;
// Get the array's length into eax and calculate new length.
__ mov(eax, FieldOperand(edx, JSArray::kLengthOffset));
STATIC_ASSERT(kSmiTagSize == 1);
STATIC_ASSERT(kSmiTag == 0);
__ add(Operand(eax), Immediate(argc << 1));
// Get the element's length into ecx.
__ mov(ecx, FieldOperand(ebx, FixedArray::kLengthOffset));
__ SmiTag(ecx);
// Check if we could survive without allocation.
__ cmp(eax, Operand(ecx));
__ j(greater, &attempt_to_grow_elements);
// Save new length.
__ mov(FieldOperand(edx, JSArray::kLengthOffset), eax);
// Push the element.
__ lea(edx, FieldOperand(ebx,
eax, times_half_pointer_size,
FixedArray::kHeaderSize - argc * kPointerSize));
__ mov(ecx, Operand(esp, argc * kPointerSize));
__ mov(Operand(edx, 0), ecx);
// Check if value is a smi.
__ test(ecx, Immediate(kSmiTagMask));
__ j(not_zero, &with_rset_update);
__ bind(&exit);
__ ret((argc + 1) * kPointerSize);
__ bind(&with_rset_update);
__ InNewSpace(ebx, ecx, equal, &exit);
RecordWriteStub stub(ebx, edx, ecx);
__ CallStub(&stub);
__ ret((argc + 1) * kPointerSize);
__ bind(&attempt_to_grow_elements);
ExternalReference new_space_allocation_top =
ExternalReference::new_space_allocation_top_address();
ExternalReference new_space_allocation_limit =
ExternalReference::new_space_allocation_limit_address();
const int kAllocationDelta = 4;
// Load top.
__ mov(ecx, Operand::StaticVariable(new_space_allocation_top));
// Check if it's the end of elements.
__ lea(edx, FieldOperand(ebx,
eax, times_half_pointer_size,
FixedArray::kHeaderSize - argc * kPointerSize));
__ cmp(edx, Operand(ecx));
__ j(not_equal, &call_builtin);
__ add(Operand(ecx), Immediate(kAllocationDelta * kPointerSize));
__ cmp(ecx, Operand::StaticVariable(new_space_allocation_limit));
__ j(greater, &call_builtin);
// We fit and could grow elements.
__ mov(Operand::StaticVariable(new_space_allocation_top), ecx);
__ mov(ecx, Operand(esp, argc * kPointerSize));
// Push the argument...
__ mov(Operand(edx, 0), ecx);
// ... and fill the rest with holes.
for (int i = 1; i < kAllocationDelta; i++) {
__ mov(Operand(edx, i * kPointerSize),
Immediate(Factory::the_hole_value()));
}
// Restore receiver to edx as finish sequence assumes it's here.
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Increment element's and array's sizes.
__ add(FieldOperand(ebx, FixedArray::kLengthOffset),
Immediate(kAllocationDelta));
__ mov(FieldOperand(edx, JSArray::kLengthOffset), eax);
// Elements are in new space, so no remembered set updates are necessary.
__ ret((argc + 1) * kPointerSize);
__ bind(&call_builtin);
}
__ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPush),
argc + 1,
1);
}
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
String* function_name = NULL;
if (function->shared()->name()->IsString()) {
function_name = String::cast(function->shared()->name());
}
return GetCode(CONSTANT_FUNCTION, function_name);
}
Object* CallStubCompiler::CompileArrayPopCall(Object* object,
JSObject* holder,
JSFunction* function,
String* name,
CheckType check) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
ASSERT(check == RECEIVER_MAP_CHECK);
Label miss, empty_array, call_builtin;
// Get the receiver from the stack.
const int argc = arguments().immediate();
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Check that the receiver isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss);
CheckPrototypes(JSObject::cast(object), edx,
holder, ebx,
eax, name, &miss);
// Get the elements array of the object.
__ mov(ebx, FieldOperand(edx, JSArray::kElementsOffset));
// Check that the elements are in fast mode (not dictionary).
__ cmp(FieldOperand(ebx, HeapObject::kMapOffset),
Immediate(Factory::fixed_array_map()));
__ j(not_equal, &miss);
// Get the array's length into ecx and calculate new length.
__ mov(ecx, FieldOperand(edx, JSArray::kLengthOffset));
__ sub(Operand(ecx), Immediate(Smi::FromInt(1)));
__ j(negative, &empty_array);
// Get the last element.
STATIC_ASSERT(kSmiTagSize == 1);
STATIC_ASSERT(kSmiTag == 0);
__ mov(eax, FieldOperand(ebx,
ecx, times_half_pointer_size,
FixedArray::kHeaderSize));
__ cmp(Operand(eax), Immediate(Factory::the_hole_value()));
__ j(equal, &call_builtin);
// Set the array's length.
__ mov(FieldOperand(edx, JSArray::kLengthOffset), ecx);
// Fill with the hole.
__ mov(FieldOperand(ebx,
ecx, times_half_pointer_size,
FixedArray::kHeaderSize),
Immediate(Factory::the_hole_value()));
__ ret((argc + 1) * kPointerSize);
__ bind(&empty_array);
__ mov(eax, Immediate(Factory::undefined_value()));
__ ret((argc + 1) * kPointerSize);
__ bind(&call_builtin);
__ TailCallExternalReference(ExternalReference(Builtins::c_ArrayPop),
argc + 1,
1);
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
String* function_name = NULL;
if (function->shared()->name()->IsString()) {
function_name = String::cast(function->shared()->name());
}
return GetCode(CONSTANT_FUNCTION, function_name);
}
Object* CallStubCompiler::CompileCallConstant(Object* object,
JSObject* holder,
JSFunction* function,
String* name,
CheckType check) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
SharedFunctionInfo* function_info = function->shared();
if (function_info->HasCustomCallGenerator()) {
CustomCallGenerator generator =
ToCData<CustomCallGenerator>(function_info->function_data());
return generator(this, object, holder, function, name, check);
}
Label miss_in_smi_check;
// Get the receiver from the stack.
const int argc = arguments().immediate();
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Check that the receiver isn't a smi.
if (check != NUMBER_CHECK) {
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss_in_smi_check, not_taken);
}
// Make sure that it's okay not to patch the on stack receiver
// unless we're doing a receiver map check.
ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK);
CallOptimization optimization(function);
int depth = kInvalidProtoDepth;
Label miss;
switch (check) {
case RECEIVER_MAP_CHECK:
__ IncrementCounter(&Counters::call_const, 1);
if (optimization.is_simple_api_call() && !object->IsGlobalObject()) {
depth = optimization.GetPrototypeDepthOfExpectedType(
JSObject::cast(object), holder);
}
if (depth != kInvalidProtoDepth) {
__ IncrementCounter(&Counters::call_const_fast_api, 1);
ReserveSpaceForFastApiCall(masm(), eax);
}
// Check that the maps haven't changed.
CheckPrototypes(JSObject::cast(object), edx, holder,
ebx, eax, name, depth, &miss);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
ASSERT(depth == kInvalidProtoDepth);
__ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
__ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
}
break;
case STRING_CHECK:
if (!function->IsBuiltin()) {
// Calling non-builtins with a value as receiver requires boxing.
__ jmp(&miss);
} else {
// Check that the object is a string or a symbol.
__ mov(eax, FieldOperand(edx, HeapObject::kMapOffset));
__ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
__ cmp(eax, FIRST_NONSTRING_TYPE);
__ j(above_equal, &miss, not_taken);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::STRING_FUNCTION_INDEX,
eax);
CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
ebx, edx, name, &miss);
}
break;
case NUMBER_CHECK: {
if (!function->IsBuiltin()) {
// Calling non-builtins with a value as receiver requires boxing.
__ jmp(&miss);
} else {
Label fast;
// Check that the object is a smi or a heap number.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &fast, taken);
__ CmpObjectType(edx, HEAP_NUMBER_TYPE, eax);
__ j(not_equal, &miss, not_taken);
__ bind(&fast);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::NUMBER_FUNCTION_INDEX,
eax);
CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
ebx, edx, name, &miss);
}
break;
}
case BOOLEAN_CHECK: {
if (!function->IsBuiltin()) {
// Calling non-builtins with a value as receiver requires boxing.
__ jmp(&miss);
} else {
Label fast;
// Check that the object is a boolean.
__ cmp(edx, Factory::true_value());
__ j(equal, &fast, taken);
__ cmp(edx, Factory::false_value());
__ j(not_equal, &miss, not_taken);
__ bind(&fast);
// Check that the maps starting from the prototype haven't changed.
GenerateLoadGlobalFunctionPrototype(masm(),
Context::BOOLEAN_FUNCTION_INDEX,
eax);
CheckPrototypes(JSObject::cast(object->GetPrototype()), eax, holder,
ebx, edx, name, &miss);
}
break;
}
default:
UNREACHABLE();
}
if (depth != kInvalidProtoDepth) {
GenerateFastApiCall(masm(), optimization, argc);
} else {
__ InvokeFunction(function, arguments(), JUMP_FUNCTION);
}
// Handle call cache miss.
__ bind(&miss);
if (depth != kInvalidProtoDepth) {
FreeSpaceForFastApiCall(masm(), eax);
}
__ bind(&miss_in_smi_check);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
String* function_name = NULL;
if (function->shared()->name()->IsString()) {
function_name = String::cast(function->shared()->name());
}
return GetCode(CONSTANT_FUNCTION, function_name);
}
Object* CallStubCompiler::CompileCallInterceptor(JSObject* object,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
Label miss;
// Get the number of arguments.
const int argc = arguments().immediate();
LookupResult lookup;
LookupPostInterceptor(holder, name, &lookup);
// Get the receiver from the stack.
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
CallInterceptorCompiler compiler(this, arguments(), ecx);
compiler.Compile(masm(),
object,
holder,
name,
&lookup,
edx,
ebx,
edi,
&miss);
// Restore receiver.
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// Check that the function really is a function.
__ test(eax, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
__ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
__ j(not_equal, &miss, not_taken);
// Patch the receiver on the stack with the global proxy if
// necessary.
if (object->IsGlobalObject()) {
__ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
__ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
}
// Invoke the function.
__ mov(edi, eax);
__ InvokeFunction(edi, arguments(), JUMP_FUNCTION);
// Handle load cache miss.
__ bind(&miss);
Handle<Code> ic = ComputeCallMiss(argc);
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* CallStubCompiler::CompileCallGlobal(JSObject* object,
GlobalObject* holder,
JSGlobalPropertyCell* cell,
JSFunction* function,
String* name) {
// ----------- S t a t e -------------
// -- ecx : name
// -- esp[0] : return address
// -- esp[(argc - n) * 4] : arg[n] (zero-based)
// -- ...
// -- esp[(argc + 1) * 4] : receiver
// -----------------------------------
Label miss;
// Get the number of arguments.
const int argc = arguments().immediate();
// Get the receiver from the stack.
__ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
// If the object is the holder then we know that it's a global
// object which can only happen for contextual calls. In this case,
// the receiver cannot be a smi.
if (object != holder) {
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
}
// Check that the maps haven't changed.
CheckPrototypes(object, edx, holder, ebx, eax, name, &miss);
// Get the value from the cell.
__ mov(edi, Immediate(Handle<JSGlobalPropertyCell>(cell)));
__ mov(edi, FieldOperand(edi, JSGlobalPropertyCell::kValueOffset));
// Check that the cell contains the same function.
if (Heap::InNewSpace(function)) {
// We can't embed a pointer to a function in new space so we have
// to verify that the shared function info is unchanged. This has
// the nice side effect that multiple closures based on the same
// function can all use this call IC. Before we load through the
// function, we have to verify that it still is a function.
__ test(edi, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
__ CmpObjectType(edi, JS_FUNCTION_TYPE, ebx);
__ j(not_equal, &miss, not_taken);
// Check the shared function info. Make sure it hasn't changed.
__ cmp(FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset),
Immediate(Handle<SharedFunctionInfo>(function->shared())));
__ j(not_equal, &miss, not_taken);
} else {
__ cmp(Operand(edi), Immediate(Handle<JSFunction>(function)));
__ j(not_equal, &miss, not_taken);
}
// Patch the receiver on the stack with the global proxy.
if (object->IsGlobalObject()) {
__ mov(edx, FieldOperand(edx, GlobalObject::kGlobalReceiverOffset));
__ mov(Operand(esp, (argc + 1) * kPointerSize), edx);
}
// Setup the context (function already in edi).
__ mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
// Jump to the cached code (tail call).
__ IncrementCounter(&Counters::call_global_inline, 1);
ASSERT(function->is_compiled());
Handle<Code> code(function->code());
ParameterCount expected(function->shared()->formal_parameter_count());
__ InvokeCode(code, expected, arguments(),
RelocInfo::CODE_TARGET, JUMP_FUNCTION);
// Handle call cache miss.
__ bind(&miss);
__ IncrementCounter(&Counters::call_global_inline_miss, 1);
Handle<Code> ic = ComputeCallMiss(arguments().immediate());
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* StoreStubCompiler::CompileStoreField(JSObject* object,
int index,
Map* transition,
String* name) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : name
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
// Generate store field code. Trashes the name register.
GenerateStoreField(masm(),
object,
index,
transition,
edx, ecx, ebx,
&miss);
// Handle store cache miss.
__ bind(&miss);
__ mov(ecx, Immediate(Handle<String>(name))); // restore name
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
}
Object* StoreStubCompiler::CompileStoreCallback(JSObject* object,
AccessorInfo* callback,
String* name) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : name
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
// Check that the object isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
// Check that the map of the object hasn't changed.
__ cmp(FieldOperand(edx, HeapObject::kMapOffset),
Immediate(Handle<Map>(object->map())));
__ j(not_equal, &miss, not_taken);
// Perform global security token check if needed.
if (object->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(edx, ebx, &miss);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
__ pop(ebx); // remove the return address
__ push(edx); // receiver
__ push(Immediate(Handle<AccessorInfo>(callback))); // callback info
__ push(ecx); // name
__ push(eax); // value
__ push(ebx); // restore return address
// Do tail-call to the runtime system.
ExternalReference store_callback_property =
ExternalReference(IC_Utility(IC::kStoreCallbackProperty));
__ TailCallExternalReference(store_callback_property, 4, 1);
// Handle store cache miss.
__ bind(&miss);
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver,
String* name) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : name
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
// Check that the object isn't a smi.
__ test(edx, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
// Check that the map of the object hasn't changed.
__ cmp(FieldOperand(edx, HeapObject::kMapOffset),
Immediate(Handle<Map>(receiver->map())));
__ j(not_equal, &miss, not_taken);
// Perform global security token check if needed.
if (receiver->IsJSGlobalProxy()) {
__ CheckAccessGlobalProxy(edx, ebx, &miss);
}
// Stub never generated for non-global objects that require access
// checks.
ASSERT(receiver->IsJSGlobalProxy() || !receiver->IsAccessCheckNeeded());
__ pop(ebx); // remove the return address
__ push(edx); // receiver
__ push(ecx); // name
__ push(eax); // value
__ push(ebx); // restore return address
// Do tail-call to the runtime system.
ExternalReference store_ic_property =
ExternalReference(IC_Utility(IC::kStoreInterceptorProperty));
__ TailCallExternalReference(store_ic_property, 3, 1);
// Handle store cache miss.
__ bind(&miss);
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* StoreStubCompiler::CompileStoreGlobal(GlobalObject* object,
JSGlobalPropertyCell* cell,
String* name) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : name
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
// Check that the map of the global has not changed.
__ cmp(FieldOperand(edx, HeapObject::kMapOffset),
Immediate(Handle<Map>(object->map())));
__ j(not_equal, &miss, not_taken);
// Store the value in the cell.
__ mov(ecx, Immediate(Handle<JSGlobalPropertyCell>(cell)));
__ mov(FieldOperand(ecx, JSGlobalPropertyCell::kValueOffset), eax);
// Return the value (register eax).
__ IncrementCounter(&Counters::named_store_global_inline, 1);
__ ret(0);
// Handle store cache miss.
__ bind(&miss);
__ IncrementCounter(&Counters::named_store_global_inline_miss, 1);
Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
int index,
Map* transition,
String* name) {
// ----------- S t a t e -------------
// -- eax : value
// -- ecx : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_store_field, 1);
// Check that the name has not changed.
__ cmp(Operand(ecx), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
// Generate store field code. Trashes the name register.
GenerateStoreField(masm(),
object,
index,
transition,
edx, ecx, ebx,
&miss);
// Handle store cache miss.
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_store_field, 1);
Handle<Code> ic(Builtins::builtin(Builtins::KeyedStoreIC_Miss));
__ jmp(ic, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode(transition == NULL ? FIELD : MAP_TRANSITION, name);
}
Object* LoadStubCompiler::CompileLoadField(JSObject* object,
JSObject* holder,
int index,
String* name) {
// ----------- S t a t e -------------
// -- eax : receiver
// -- ecx : name
// -- esp[0] : return address
// -----------------------------------
Label miss;
GenerateLoadField(object, holder, eax, ebx, edx, index, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(FIELD, name);
}
Object* LoadStubCompiler::CompileLoadCallback(String* name,
JSObject* object,
JSObject* holder,
AccessorInfo* callback) {
// ----------- S t a t e -------------
// -- eax : receiver
// -- ecx : name
// -- esp[0] : return address
// -----------------------------------
Label miss;
Failure* failure = Failure::InternalError();
bool success = GenerateLoadCallback(object, holder, eax, ecx, ebx, edx,
callback, name, &miss, &failure);
if (!success) return failure;
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* LoadStubCompiler::CompileLoadConstant(JSObject* object,
JSObject* holder,
Object* value,
String* name) {
// ----------- S t a t e -------------
// -- eax : receiver
// -- ecx : name
// -- esp[0] : return address
// -----------------------------------
Label miss;
GenerateLoadConstant(object, holder, eax, ebx, edx, value, name, &miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(CONSTANT_FUNCTION, name);
}
Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- eax : receiver
// -- ecx : name
// -- esp[0] : return address
// -----------------------------------
Label miss;
LookupResult lookup;
LookupPostInterceptor(holder, name, &lookup);
// TODO(368): Compile in the whole chain: all the interceptors in
// prototypes and ultimate answer.
GenerateLoadInterceptor(receiver,
holder,
&lookup,
eax,
ecx,
edx,
ebx,
name,
&miss);
__ bind(&miss);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* LoadStubCompiler::CompileLoadGlobal(JSObject* object,
GlobalObject* holder,
JSGlobalPropertyCell* cell,
String* name,
bool is_dont_delete) {
// ----------- S t a t e -------------
// -- eax : receiver
// -- ecx : name
// -- esp[0] : return address
// -----------------------------------
Label miss;
// If the object is the holder then we know that it's a global
// object which can only happen for contextual loads. In this case,
// the receiver cannot be a smi.
if (object != holder) {
__ test(eax, Immediate(kSmiTagMask));
__ j(zero, &miss, not_taken);
}
// Check that the maps haven't changed.
CheckPrototypes(object, eax, holder, ebx, edx, name, &miss);
// Get the value from the cell.
__ mov(ebx, Immediate(Handle<JSGlobalPropertyCell>(cell)));
__ mov(ebx, FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset));
// Check for deleted property if property can actually be deleted.
if (!is_dont_delete) {
__ cmp(ebx, Factory::the_hole_value());
__ j(equal, &miss, not_taken);
} else if (FLAG_debug_code) {
__ cmp(ebx, Factory::the_hole_value());
__ Check(not_equal, "DontDelete cells can't contain the hole");
}
__ IncrementCounter(&Counters::named_load_global_inline, 1);
__ mov(eax, ebx);
__ ret(0);
__ bind(&miss);
__ IncrementCounter(&Counters::named_load_global_inline_miss, 1);
GenerateLoadMiss(masm(), Code::LOAD_IC);
// Return the generated code.
return GetCode(NORMAL, name);
}
Object* KeyedLoadStubCompiler::CompileLoadField(String* name,
JSObject* receiver,
JSObject* holder,
int index) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_field, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
GenerateLoadField(receiver, holder, edx, ebx, ecx, index, name, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_field, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(FIELD, name);
}
Object* KeyedLoadStubCompiler::CompileLoadCallback(String* name,
JSObject* receiver,
JSObject* holder,
AccessorInfo* callback) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_callback, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
Failure* failure = Failure::InternalError();
bool success = GenerateLoadCallback(receiver, holder, edx, eax, ebx, ecx,
callback, name, &miss, &failure);
if (!success) return failure;
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_callback, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* KeyedLoadStubCompiler::CompileLoadConstant(String* name,
JSObject* receiver,
JSObject* holder,
Object* value) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_constant_function, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
GenerateLoadConstant(receiver, holder, edx, ebx, ecx,
value, name, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_constant_function, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CONSTANT_FUNCTION, name);
}
Object* KeyedLoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
JSObject* holder,
String* name) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_interceptor, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
LookupResult lookup;
LookupPostInterceptor(holder, name, &lookup);
GenerateLoadInterceptor(receiver,
holder,
&lookup,
edx,
eax,
ecx,
ebx,
name,
&miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_interceptor, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(INTERCEPTOR, name);
}
Object* KeyedLoadStubCompiler::CompileLoadArrayLength(String* name) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_array_length, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
GenerateLoadArrayLength(masm(), edx, ecx, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_array_length, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* KeyedLoadStubCompiler::CompileLoadStringLength(String* name) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_string_length, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
GenerateLoadStringLength(masm(), edx, ecx, ebx, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_string_length, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) {
// ----------- S t a t e -------------
// -- eax : key
// -- edx : receiver
// -- esp[0] : return address
// -----------------------------------
Label miss;
__ IncrementCounter(&Counters::keyed_load_function_prototype, 1);
// Check that the name has not changed.
__ cmp(Operand(eax), Immediate(Handle<String>(name)));
__ j(not_equal, &miss, not_taken);
GenerateLoadFunctionPrototype(masm(), edx, ecx, ebx, &miss);
__ bind(&miss);
__ DecrementCounter(&Counters::keyed_load_function_prototype, 1);
GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
// Return the generated code.
return GetCode(CALLBACKS, name);
}
// Specialized stub for constructing objects from functions which only have only
// simple assignments of the form this.x = ...; in their body.
Object* ConstructStubCompiler::CompileConstructStub(
SharedFunctionInfo* shared) {
// ----------- S t a t e -------------
// -- eax : argc
// -- edi : constructor
// -- esp[0] : return address
// -- esp[4] : last argument
// -----------------------------------
Label generic_stub_call;
#ifdef ENABLE_DEBUGGER_SUPPORT
// Check to see whether there are any break points in the function code. If
// there are jump to the generic constructor stub which calls the actual
// code for the function thereby hitting the break points.
__ mov(ebx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
__ mov(ebx, FieldOperand(ebx, SharedFunctionInfo::kDebugInfoOffset));
__ cmp(ebx, Factory::undefined_value());
__ j(not_equal, &generic_stub_call, not_taken);
#endif
// Load the initial map and verify that it is in fact a map.
__ mov(ebx, FieldOperand(edi, JSFunction::kPrototypeOrInitialMapOffset));
// Will both indicate a NULL and a Smi.
__ test(ebx, Immediate(kSmiTagMask));
__ j(zero, &generic_stub_call);
__ CmpObjectType(ebx, MAP_TYPE, ecx);
__ j(not_equal, &generic_stub_call);
#ifdef DEBUG
// Cannot construct functions this way.
// edi: constructor
// ebx: initial map
__ CmpInstanceType(ebx, JS_FUNCTION_TYPE);
__ Assert(not_equal, "Function constructed by construct stub.");
#endif
// Now allocate the JSObject on the heap by moving the new space allocation
// top forward.
// edi: constructor
// ebx: initial map
__ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
__ shl(ecx, kPointerSizeLog2);
__ AllocateInNewSpace(ecx,
edx,
ecx,
no_reg,
&generic_stub_call,
NO_ALLOCATION_FLAGS);
// Allocated the JSObject, now initialize the fields and add the heap tag.
// ebx: initial map
// edx: JSObject (untagged)
__ mov(Operand(edx, JSObject::kMapOffset), ebx);
__ mov(ebx, Factory::empty_fixed_array());
__ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
__ mov(Operand(edx, JSObject::kElementsOffset), ebx);
// Push the allocated object to the stack. This is the object that will be
// returned (after it is tagged).
__ push(edx);
// eax: argc
// edx: JSObject (untagged)
// Load the address of the first in-object property into edx.
__ lea(edx, Operand(edx, JSObject::kHeaderSize));
// Calculate the location of the first argument. The stack contains the
// allocated object and the return address on top of the argc arguments.
__ lea(ecx, Operand(esp, eax, times_4, 1 * kPointerSize));
// Use edi for holding undefined which is used in several places below.
__ mov(edi, Factory::undefined_value());
// eax: argc
// ecx: first argument
// edx: first in-object property of the JSObject
// edi: undefined
// Fill the initialized properties with a constant value or a passed argument
// depending on the this.x = ...; assignment in the function.
for (int i = 0; i < shared->this_property_assignments_count(); i++) {
if (shared->IsThisPropertyAssignmentArgument(i)) {
// Check if the argument assigned to the property is actually passed.
// If argument is not passed the property is set to undefined,
// otherwise find it on the stack.
int arg_number = shared->GetThisPropertyAssignmentArgument(i);
__ mov(ebx, edi);
__ cmp(eax, arg_number);
if (CpuFeatures::IsSupported(CMOV)) {
CpuFeatures::Scope use_cmov(CMOV);
__ cmov(above, ebx, Operand(ecx, arg_number * -kPointerSize));
} else {
Label not_passed;
__ j(below_equal, &not_passed);
__ mov(ebx, Operand(ecx, arg_number * -kPointerSize));
__ bind(&not_passed);
}
// Store value in the property.
__ mov(Operand(edx, i * kPointerSize), ebx);
} else {
// Set the property to the constant value.
Handle<Object> constant(shared->GetThisPropertyAssignmentConstant(i));
__ mov(Operand(edx, i * kPointerSize), Immediate(constant));
}
}
// Fill the unused in-object property fields with undefined.
for (int i = shared->this_property_assignments_count();
i < shared->CalculateInObjectProperties();
i++) {
__ mov(Operand(edx, i * kPointerSize), edi);
}
// Move argc to ebx and retrieve and tag the JSObject to return.
__ mov(ebx, eax);
__ pop(eax);
__ or_(Operand(eax), Immediate(kHeapObjectTag));
// Remove caller arguments and receiver from the stack and return.
__ pop(ecx);
__ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize));
__ push(ecx);
__ IncrementCounter(&Counters::constructed_objects, 1);
__ IncrementCounter(&Counters::constructed_objects_stub, 1);
__ ret(0);
// Jump to the generic stub in case the specialized code cannot handle the
// construction.
__ bind(&generic_stub_call);
Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
Handle<Code> generic_construct_stub(code);
__ jmp(generic_construct_stub, RelocInfo::CODE_TARGET);
// Return the generated code.
return GetCode();
}
#undef __
} } // namespace v8::internal