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// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_CODEGEN_H_
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#define V8_CODEGEN_H_
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#include "ast.h"
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#include "code-stubs.h"
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#include "runtime.h"
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#include "number-info.h"
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// Include the declaration of the architecture defined class CodeGenerator.
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// The contract to the shared code is that the the CodeGenerator is a subclass
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// of Visitor and that the following methods are available publicly:
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// MakeCode
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// MakeCodePrologue
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// MakeCodeEpilogue
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// masm
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// frame
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// script
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// has_valid_frame
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// SetFrame
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// DeleteFrame
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// allocator
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// AddDeferred
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// in_spilled_code
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// set_in_spilled_code
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// RecordPositions
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//
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// These methods are either used privately by the shared code or implemented as
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// shared code:
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// CodeGenerator
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// ~CodeGenerator
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// ProcessDeferred
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// Generate
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// ComputeLazyCompile
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// BuildBoilerplate
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// ComputeCallInitialize
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// ComputeCallInitializeInLoop
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// ProcessDeclarations
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// DeclareGlobals
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// FindInlineRuntimeLUT
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// CheckForInlineRuntimeCall
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// PatchInlineRuntimeEntry
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// AnalyzeCondition
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// CodeForFunctionPosition
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// CodeForReturnPosition
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// CodeForStatementPosition
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// CodeForDoWhileConditionPosition
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// CodeForSourcePosition
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// Mode to overwrite BinaryExpression values.
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enum OverwriteMode { NO_OVERWRITE, OVERWRITE_LEFT, OVERWRITE_RIGHT };
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// Types of uncatchable exceptions.
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enum UncatchableExceptionType { OUT_OF_MEMORY, TERMINATION };
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#if V8_TARGET_ARCH_IA32
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#include "ia32/codegen-ia32.h"
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#elif V8_TARGET_ARCH_X64
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#include "x64/codegen-x64.h"
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#elif V8_TARGET_ARCH_ARM
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#include "arm/codegen-arm.h"
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#elif V8_TARGET_ARCH_MIPS
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#include "mips/codegen-mips.h"
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#else
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#error Unsupported target architecture.
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#endif
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#include "register-allocator.h"
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namespace v8 {
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namespace internal {
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#define INLINE_RUNTIME_FUNCTION_LIST(F) \
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F(IsSmi, 1, 1) \
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F(IsNonNegativeSmi, 1, 1) \
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F(IsArray, 1, 1) \
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F(IsRegExp, 1, 1) \
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F(IsConstructCall, 0, 1) \
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F(ArgumentsLength, 0, 1) \
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F(Arguments, 1, 1) \
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F(ClassOf, 1, 1) \
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F(ValueOf, 1, 1) \
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F(SetValueOf, 2, 1) \
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F(FastCharCodeAt, 2, 1) \
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F(CharFromCode, 1, 1) \
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F(ObjectEquals, 2, 1) \
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F(Log, 3, 1) \
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F(RandomPositiveSmi, 0, 1) \
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F(IsObject, 1, 1) \
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F(IsFunction, 1, 1) \
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F(IsUndetectableObject, 1, 1) \
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F(StringAdd, 2, 1) \
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F(SubString, 3, 1) \
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F(StringCompare, 2, 1) \
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F(RegExpExec, 4, 1) \
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F(NumberToString, 1, 1) \
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F(MathPow, 2, 1) \
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F(MathSin, 1, 1) \
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F(MathCos, 1, 1) \
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F(MathSqrt, 1, 1)
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// Support for "structured" code comments.
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#ifdef DEBUG
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class Comment BASE_EMBEDDED {
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public:
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Comment(MacroAssembler* masm, const char* msg);
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~Comment();
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private:
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MacroAssembler* masm_;
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const char* msg_;
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};
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#else
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class Comment BASE_EMBEDDED {
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public:
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Comment(MacroAssembler*, const char*) {}
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};
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#endif // DEBUG
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// Code generation can be nested. Code generation scopes form a stack
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// of active code generators.
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class CodeGeneratorScope BASE_EMBEDDED {
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public:
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explicit CodeGeneratorScope(CodeGenerator* cgen) {
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previous_ = top_;
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top_ = cgen;
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}
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~CodeGeneratorScope() {
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top_ = previous_;
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}
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static CodeGenerator* Current() {
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ASSERT(top_ != NULL);
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return top_;
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}
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private:
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static CodeGenerator* top_;
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CodeGenerator* previous_;
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};
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// Deferred code objects are small pieces of code that are compiled
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// out of line. They are used to defer the compilation of uncommon
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// paths thereby avoiding expensive jumps around uncommon code parts.
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class DeferredCode: public ZoneObject {
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public:
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DeferredCode();
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virtual ~DeferredCode() { }
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virtual void Generate() = 0;
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MacroAssembler* masm() { return masm_; }
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int statement_position() const { return statement_position_; }
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int position() const { return position_; }
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Label* entry_label() { return &entry_label_; }
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Label* exit_label() { return &exit_label_; }
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#ifdef DEBUG
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void set_comment(const char* comment) { comment_ = comment; }
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const char* comment() const { return comment_; }
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#else
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void set_comment(const char* comment) { }
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const char* comment() const { return ""; }
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#endif
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inline void Jump();
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inline void Branch(Condition cc);
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void BindExit() { masm_->bind(&exit_label_); }
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void SaveRegisters();
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void RestoreRegisters();
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protected:
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MacroAssembler* masm_;
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private:
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// Constants indicating special actions. They should not be multiples
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// of kPointerSize so they will not collide with valid offsets from
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// the frame pointer.
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static const int kIgnore = -1;
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static const int kPush = 1;
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// This flag is ored with a valid offset from the frame pointer, so
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// it should fit in the low zero bits of a valid offset.
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static const int kSyncedFlag = 2;
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int statement_position_;
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int position_;
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Label entry_label_;
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Label exit_label_;
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int registers_[RegisterAllocator::kNumRegisters];
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#ifdef DEBUG
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const char* comment_;
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#endif
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DISALLOW_COPY_AND_ASSIGN(DeferredCode);
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};
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class StackCheckStub : public CodeStub {
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public:
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StackCheckStub() { }
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void Generate(MacroAssembler* masm);
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private:
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const char* GetName() { return "StackCheckStub"; }
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Major MajorKey() { return StackCheck; }
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int MinorKey() { return 0; }
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};
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class FastNewClosureStub : public CodeStub {
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public:
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void Generate(MacroAssembler* masm);
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private:
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const char* GetName() { return "FastNewClosureStub"; }
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Major MajorKey() { return FastNewClosure; }
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int MinorKey() { return 0; }
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};
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class FastNewContextStub : public CodeStub {
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public:
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static const int kMaximumSlots = 64;
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explicit FastNewContextStub(int slots) : slots_(slots) {
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ASSERT(slots_ > 0 && slots <= kMaximumSlots);
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}
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void Generate(MacroAssembler* masm);
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private:
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int slots_;
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const char* GetName() { return "FastNewContextStub"; }
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Major MajorKey() { return FastNewContext; }
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int MinorKey() { return slots_; }
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};
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class FastCloneShallowArrayStub : public CodeStub {
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public:
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static const int kMaximumLength = 8;
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explicit FastCloneShallowArrayStub(int length) : length_(length) {
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ASSERT(length >= 0 && length <= kMaximumLength);
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}
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void Generate(MacroAssembler* masm);
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private:
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int length_;
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const char* GetName() { return "FastCloneShallowArrayStub"; }
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Major MajorKey() { return FastCloneShallowArray; }
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int MinorKey() { return length_; }
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};
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class InstanceofStub: public CodeStub {
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public:
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InstanceofStub() { }
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void Generate(MacroAssembler* masm);
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private:
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Major MajorKey() { return Instanceof; }
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int MinorKey() { return 0; }
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};
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class GenericUnaryOpStub : public CodeStub {
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public:
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GenericUnaryOpStub(Token::Value op, bool overwrite)
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: op_(op), overwrite_(overwrite) { }
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private:
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Token::Value op_;
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bool overwrite_;
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class OverwriteField: public BitField<int, 0, 1> {};
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class OpField: public BitField<Token::Value, 1, kMinorBits - 1> {};
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Major MajorKey() { return GenericUnaryOp; }
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int MinorKey() {
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return OpField::encode(op_) | OverwriteField::encode(overwrite_);
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}
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void Generate(MacroAssembler* masm);
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const char* GetName();
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};
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enum NaNInformation {
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kBothCouldBeNaN,
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kCantBothBeNaN
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};
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class CompareStub: public CodeStub {
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public:
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CompareStub(Condition cc,
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bool strict,
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NaNInformation nan_info = kBothCouldBeNaN) :
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cc_(cc), strict_(strict), never_nan_nan_(nan_info == kCantBothBeNaN) { }
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void Generate(MacroAssembler* masm);
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private:
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Condition cc_;
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bool strict_;
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// Only used for 'equal' comparisons. Tells the stub that we already know
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// that at least one side of the comparison is not NaN. This allows the
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// stub to use object identity in the positive case. We ignore it when
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// generating the minor key for other comparisons to avoid creating more
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// stubs.
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bool never_nan_nan_;
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Major MajorKey() { return Compare; }
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int MinorKey();
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// Branch to the label if the given object isn't a symbol.
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void BranchIfNonSymbol(MacroAssembler* masm,
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Label* label,
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Register object,
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Register scratch);
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// Unfortunately you have to run without snapshots to see most of these
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// names in the profile since most compare stubs end up in the snapshot.
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const char* GetName();
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#ifdef DEBUG
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void Print() {
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PrintF("CompareStub (cc %d), (strict %s)\n",
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static_cast<int>(cc_),
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strict_ ? "true" : "false");
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}
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#endif
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};
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class CEntryStub : public CodeStub {
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public:
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explicit CEntryStub(int result_size,
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ExitFrame::Mode mode = ExitFrame::MODE_NORMAL)
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: result_size_(result_size), mode_(mode) { }
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void Generate(MacroAssembler* masm);
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private:
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void GenerateCore(MacroAssembler* masm,
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Label* throw_normal_exception,
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Label* throw_termination_exception,
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Label* throw_out_of_memory_exception,
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bool do_gc,
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bool always_allocate_scope);
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void GenerateThrowTOS(MacroAssembler* masm);
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void GenerateThrowUncatchable(MacroAssembler* masm,
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UncatchableExceptionType type);
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// Number of pointers/values returned.
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const int result_size_;
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const ExitFrame::Mode mode_;
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// Minor key encoding
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class ExitFrameModeBits: public BitField<ExitFrame::Mode, 0, 1> {};
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class IndirectResultBits: public BitField<bool, 1, 1> {};
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Major MajorKey() { return CEntry; }
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// Minor key must differ if different result_size_ values means different
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// code is generated.
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int MinorKey();
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const char* GetName() { return "CEntryStub"; }
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};
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class ApiGetterEntryStub : public CodeStub {
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public:
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ApiGetterEntryStub(Handle<AccessorInfo> info,
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ApiFunction* fun)
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: info_(info),
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fun_(fun) { }
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void Generate(MacroAssembler* masm);
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virtual bool has_custom_cache() { return true; }
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virtual bool GetCustomCache(Code** code_out);
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virtual void SetCustomCache(Code* value);
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static const int kStackSpace = 6;
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static const int kArgc = 4;
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private:
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Handle<AccessorInfo> info() { return info_; }
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ApiFunction* fun() { return fun_; }
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Major MajorKey() { return NoCache; }
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int MinorKey() { return 0; }
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const char* GetName() { return "ApiEntryStub"; }
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// The accessor info associated with the function.
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|
Handle<AccessorInfo> info_;
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// The function to be called.
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ApiFunction* fun_;
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};
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class JSEntryStub : public CodeStub {
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public:
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JSEntryStub() { }
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void Generate(MacroAssembler* masm) { GenerateBody(masm, false); }
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protected:
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|
void GenerateBody(MacroAssembler* masm, bool is_construct);
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private:
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|
Major MajorKey() { return JSEntry; }
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|
int MinorKey() { return 0; }
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|
|
const char* GetName() { return "JSEntryStub"; }
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};
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|
|
class JSConstructEntryStub : public JSEntryStub {
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public:
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|
|
JSConstructEntryStub() { }
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|
|
|
void Generate(MacroAssembler* masm) { GenerateBody(masm, true); }
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private:
|
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|
|
int MinorKey() { return 1; }
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|
|
const char* GetName() { return "JSConstructEntryStub"; }
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|
|
};
|
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|
|
class ArgumentsAccessStub: public CodeStub {
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|
|
public:
|
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|
|
enum Type {
|
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|
|
READ_LENGTH,
|
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|
|
READ_ELEMENT,
|
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|
|
NEW_OBJECT
|
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|
|
};
|
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|
|
explicit ArgumentsAccessStub(Type type) : type_(type) { }
|
|
|
|
|
|
|
|
private:
|
|
|
|
Type type_;
|
|
|
|
|
|
|
|
Major MajorKey() { return ArgumentsAccess; }
|
|
|
|
int MinorKey() { return type_; }
|
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|
|
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
void GenerateReadLength(MacroAssembler* masm);
|
|
|
|
void GenerateReadElement(MacroAssembler* masm);
|
|
|
|
void GenerateNewObject(MacroAssembler* masm);
|
|
|
|
|
|
|
|
const char* GetName() { return "ArgumentsAccessStub"; }
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
void Print() {
|
|
|
|
PrintF("ArgumentsAccessStub (type %d)\n", type_);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class RegExpExecStub: public CodeStub {
|
|
|
|
public:
|
|
|
|
RegExpExecStub() { }
|
|
|
|
|
|
|
|
private:
|
|
|
|
Major MajorKey() { return RegExpExec; }
|
|
|
|
int MinorKey() { return 0; }
|
|
|
|
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
|
|
|
|
const char* GetName() { return "RegExpExecStub"; }
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
void Print() {
|
|
|
|
PrintF("RegExpExecStub\n");
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class CallFunctionStub: public CodeStub {
|
|
|
|
public:
|
|
|
|
CallFunctionStub(int argc, InLoopFlag in_loop, CallFunctionFlags flags)
|
|
|
|
: argc_(argc), in_loop_(in_loop), flags_(flags) { }
|
|
|
|
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
|
|
|
|
private:
|
|
|
|
int argc_;
|
|
|
|
InLoopFlag in_loop_;
|
|
|
|
CallFunctionFlags flags_;
|
|
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
void Print() {
|
|
|
|
PrintF("CallFunctionStub (args %d, in_loop %d, flags %d)\n",
|
|
|
|
argc_,
|
|
|
|
static_cast<int>(in_loop_),
|
|
|
|
static_cast<int>(flags_));
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
// Minor key encoding in 32 bits with Bitfield <Type, shift, size>.
|
|
|
|
class InLoopBits: public BitField<InLoopFlag, 0, 1> {};
|
|
|
|
class FlagBits: public BitField<CallFunctionFlags, 1, 1> {};
|
|
|
|
class ArgcBits: public BitField<int, 2, 32 - 2> {};
|
|
|
|
|
|
|
|
Major MajorKey() { return CallFunction; }
|
|
|
|
int MinorKey() {
|
|
|
|
// Encode the parameters in a unique 32 bit value.
|
|
|
|
return InLoopBits::encode(in_loop_)
|
|
|
|
| FlagBits::encode(flags_)
|
|
|
|
| ArgcBits::encode(argc_);
|
|
|
|
}
|
|
|
|
|
|
|
|
InLoopFlag InLoop() { return in_loop_; }
|
|
|
|
bool ReceiverMightBeValue() {
|
|
|
|
return (flags_ & RECEIVER_MIGHT_BE_VALUE) != 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
public:
|
|
|
|
static int ExtractArgcFromMinorKey(int minor_key) {
|
|
|
|
return ArgcBits::decode(minor_key);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
class ToBooleanStub: public CodeStub {
|
|
|
|
public:
|
|
|
|
ToBooleanStub() { }
|
|
|
|
|
|
|
|
void Generate(MacroAssembler* masm);
|
|
|
|
|
|
|
|
private:
|
|
|
|
Major MajorKey() { return ToBoolean; }
|
|
|
|
int MinorKey() { return 0; }
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
} // namespace internal
|
|
|
|
} // namespace v8
|
|
|
|
|
|
|
|
#endif // V8_CODEGEN_H_
|