author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2008, 2009 Apple Inc. All rights reserved. |
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* Copyright (C) 2008 Cameron Zwarich <cwzwarich@uwaterloo.ca> |
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* |
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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 |
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* are met: |
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* |
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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* its 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 APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY 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 OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef BytecodeGenerator_h |
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#define BytecodeGenerator_h |
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#include "CodeBlock.h" |
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#include "HashTraits.h" |
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#include "Instruction.h" |
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#include "Label.h" |
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#include "LabelScope.h" |
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#include "Interpreter.h" |
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#include "RegisterID.h" |
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#include "SymbolTable.h" |
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#include "Debugger.h" |
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#include "Nodes.h" |
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#include <wtf/FastAllocBase.h> |
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#include <wtf/PassRefPtr.h> |
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#include <wtf/SegmentedVector.h> |
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#include <wtf/Vector.h> |
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namespace JSC { |
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class Identifier; |
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class ScopeChain; |
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class ScopeNode; |
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class CallArguments { |
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public: |
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CallArguments(BytecodeGenerator& generator, ArgumentsNode* argumentsNode); |
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RegisterID* thisRegister() { return m_argv[0].get(); } |
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RegisterID* argumentRegister(unsigned i) { return m_argv[i + 1].get(); } |
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unsigned callFrame() { return thisRegister()->index() + count() + RegisterFile::CallFrameHeaderSize; } |
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unsigned count() { return m_argv.size(); } |
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RegisterID* profileHookRegister() { return m_profileHookRegister.get(); } |
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ArgumentsNode* argumentsNode() { return m_argumentsNode; } |
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private: |
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RefPtr<RegisterID> m_profileHookRegister; |
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ArgumentsNode* m_argumentsNode; |
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Vector<RefPtr<RegisterID>, 16> m_argv; |
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}; |
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struct FinallyContext { |
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Label* finallyAddr; |
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RegisterID* retAddrDst; |
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}; |
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struct ControlFlowContext { |
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bool isFinallyBlock; |
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FinallyContext finallyContext; |
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}; |
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struct ForInContext { |
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RefPtr<RegisterID> expectedSubscriptRegister; |
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RefPtr<RegisterID> iterRegister; |
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RefPtr<RegisterID> indexRegister; |
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RefPtr<RegisterID> propertyRegister; |
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}; |
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class BytecodeGenerator : public FastAllocBase { |
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public: |
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typedef DeclarationStacks::VarStack VarStack; |
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typedef DeclarationStacks::FunctionStack FunctionStack; |
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static void setDumpsGeneratedCode(bool dumpsGeneratedCode); |
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static bool dumpsGeneratedCode(); |
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BytecodeGenerator(ProgramNode*, const Debugger*, const ScopeChain&, SymbolTable*, ProgramCodeBlock*); |
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BytecodeGenerator(FunctionBodyNode*, const Debugger*, const ScopeChain&, SymbolTable*, CodeBlock*); |
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BytecodeGenerator(EvalNode*, const Debugger*, const ScopeChain&, SymbolTable*, EvalCodeBlock*); |
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JSGlobalData* globalData() const { return m_globalData; } |
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const CommonIdentifiers& propertyNames() const { return *m_globalData->propertyNames; } |
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102 |
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bool isConstructor() { return m_codeBlock->m_isConstructor; } |
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104 |
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void generate(); |
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106 |
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// Returns the register corresponding to a local variable, or 0 if no |
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// such register exists. Registers returned by registerFor do not |
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// require explicit reference counting. |
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RegisterID* registerFor(const Identifier&); |
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111 |
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// Returns the agument number if this is an argument, or 0 if not. |
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int argumentNumberFor(const Identifier&); |
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114 |
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void setIsNumericCompareFunction(bool isNumericCompareFunction); |
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116 |
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bool willResolveToArguments(const Identifier&); |
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RegisterID* uncheckedRegisterForArguments(); |
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119 |
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// Behaves as registerFor does, but ignores dynamic scope as |
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// dynamic scope should not interfere with const initialisation |
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RegisterID* constRegisterFor(const Identifier&); |
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123 |
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// Searches the scope chain in an attempt to statically locate the requested |
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// property. Returns false if for any reason the property cannot be safely |
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// optimised at all. Otherwise it will return the index and depth of the |
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// VariableObject that defines the property. If the property cannot be found |
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// statically, depth will contain the depth of the scope chain where dynamic |
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// lookup must begin. |
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bool findScopedProperty(const Identifier&, int& index, size_t& depth, bool forWriting, bool& includesDynamicScopes, JSObject*& globalObject); |
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131 |
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// Returns the register storing "this" |
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RegisterID* thisRegister() { return &m_thisRegister; } |
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134 |
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bool isLocal(const Identifier&); |
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bool isLocalConstant(const Identifier&); |
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137 |
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// Returns the next available temporary register. Registers returned by |
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// newTemporary require a modified form of reference counting: any |
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// register with a refcount of 0 is considered "available", meaning that |
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// the next instruction may overwrite it. |
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RegisterID* newTemporary(); |
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143 |
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RegisterID* highestUsedRegister(); |
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145 |
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// The same as newTemporary(), but this function returns "suggestion" if |
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// "suggestion" is a temporary. This function is helpful in situations |
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// where you've put "suggestion" in a RefPtr, but you'd like to allow |
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// the next instruction to overwrite it anyway. |
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RegisterID* newTemporaryOr(RegisterID* suggestion) { return suggestion->isTemporary() ? suggestion : newTemporary(); } |
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151 |
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// Functions for handling of dst register |
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153 |
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RegisterID* ignoredResult() { return &m_ignoredResultRegister; } |
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155 |
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// Returns a place to write intermediate values of an operation |
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// which reuses dst if it is safe to do so. |
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RegisterID* tempDestination(RegisterID* dst) |
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{ |
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return (dst && dst != ignoredResult() && dst->isTemporary()) ? dst : newTemporary(); |
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} |
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162 |
|
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// Returns the place to write the final output of an operation. |
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RegisterID* finalDestination(RegisterID* originalDst, RegisterID* tempDst = 0) |
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{ |
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if (originalDst && originalDst != ignoredResult()) |
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return originalDst; |
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ASSERT(tempDst != ignoredResult()); |
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if (tempDst && tempDst->isTemporary()) |
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return tempDst; |
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return newTemporary(); |
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} |
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173 |
|
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// Returns the place to write the final output of an operation. |
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RegisterID* finalDestinationOrIgnored(RegisterID* originalDst, RegisterID* tempDst = 0) |
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{ |
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if (originalDst) |
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return originalDst; |
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ASSERT(tempDst != ignoredResult()); |
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if (tempDst && tempDst->isTemporary()) |
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return tempDst; |
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return newTemporary(); |
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} |
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184 |
|
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RegisterID* destinationForAssignResult(RegisterID* dst) |
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{ |
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if (dst && dst != ignoredResult() && m_codeBlock->needsFullScopeChain()) |
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return dst->isTemporary() ? dst : newTemporary(); |
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return 0; |
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} |
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191 |
|
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// Moves src to dst if dst is not null and is different from src, otherwise just returns src. |
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RegisterID* moveToDestinationIfNeeded(RegisterID* dst, RegisterID* src) |
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{ |
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return dst == ignoredResult() ? 0 : (dst && dst != src) ? emitMove(dst, src) : src; |
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} |
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197 |
|
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PassRefPtr<LabelScope> newLabelScope(LabelScope::Type, const Identifier* = 0); |
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PassRefPtr<Label> newLabel(); |
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200 |
|
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// The emitNode functions are just syntactic sugar for calling |
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// Node::emitCode. These functions accept a 0 for the register, |
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// meaning that the node should allocate a register, or ignoredResult(), |
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204 |
// meaning that the node need not put the result in a register. |
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// Other emit functions do not accept 0 or ignoredResult(). |
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206 |
RegisterID* emitNode(RegisterID* dst, Node* n) |
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207 |
{ |
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208 |
// Node::emitCode assumes that dst, if provided, is either a local or a referenced temporary. |
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ASSERT(!dst || dst == ignoredResult() || !dst->isTemporary() || dst->refCount()); |
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210 |
if (!m_codeBlock->numberOfLineInfos() || m_codeBlock->lastLineInfo().lineNumber != n->lineNo()) { |
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LineInfo info = { instructions().size(), n->lineNo() }; |
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m_codeBlock->addLineInfo(info); |
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213 |
} |
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214 |
if (m_emitNodeDepth >= s_maxEmitNodeDepth) |
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return emitThrowExpressionTooDeepException(); |
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++m_emitNodeDepth; |
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RegisterID* r = n->emitBytecode(*this, dst); |
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--m_emitNodeDepth; |
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return r; |
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220 |
} |
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221 |
|
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RegisterID* emitNode(Node* n) |
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223 |
{ |
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return emitNode(0, n); |
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225 |
} |
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226 |
|
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void emitNodeInConditionContext(ExpressionNode* n, Label* trueTarget, Label* falseTarget, bool fallThroughMeansTrue) |
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228 |
{ |
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if (!m_codeBlock->numberOfLineInfos() || m_codeBlock->lastLineInfo().lineNumber != n->lineNo()) { |
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LineInfo info = { instructions().size(), n->lineNo() }; |
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m_codeBlock->addLineInfo(info); |
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232 |
} |
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if (m_emitNodeDepth >= s_maxEmitNodeDepth) |
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emitThrowExpressionTooDeepException(); |
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++m_emitNodeDepth; |
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n->emitBytecodeInConditionContext(*this, trueTarget, falseTarget, fallThroughMeansTrue); |
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--m_emitNodeDepth; |
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238 |
} |
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239 |
|
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240 |
void emitExpressionInfo(unsigned divot, unsigned startOffset, unsigned endOffset) |
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241 |
{ |
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divot -= m_codeBlock->sourceOffset(); |
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if (divot > ExpressionRangeInfo::MaxDivot) { |
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// Overflow has occurred, we can only give line number info for errors for this region |
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divot = 0; |
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startOffset = 0; |
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endOffset = 0; |
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} else if (startOffset > ExpressionRangeInfo::MaxOffset) { |
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// If the start offset is out of bounds we clear both offsets |
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// so we only get the divot marker. Error message will have to be reduced |
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// to line and column number. |
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startOffset = 0; |
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endOffset = 0; |
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} else if (endOffset > ExpressionRangeInfo::MaxOffset) { |
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// The end offset is only used for additional context, and is much more likely |
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// to overflow (eg. function call arguments) so we are willing to drop it without |
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// dropping the rest of the range. |
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endOffset = 0; |
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259 |
} |
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|
260 |
|
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|
261 |
ExpressionRangeInfo info; |
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|
262 |
info.instructionOffset = instructions().size(); |
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|
263 |
info.divotPoint = divot; |
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|
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info.startOffset = startOffset; |
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info.endOffset = endOffset; |
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|
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m_codeBlock->addExpressionInfo(info); |
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|
267 |
} |
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|
268 |
|
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|
269 |
void emitGetByIdExceptionInfo(OpcodeID opcodeID) |
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270 |
{ |
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// Only op_construct and op_instanceof need exception info for |
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// a preceding op_get_by_id. |
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ASSERT(opcodeID == op_create_this || opcodeID == op_instanceof); |
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|
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GetByIdExceptionInfo info; |
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info.bytecodeOffset = instructions().size(); |
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info.isOpCreateThis = (opcodeID == op_create_this); |
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|
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m_codeBlock->addGetByIdExceptionInfo(info); |
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|
278 |
} |
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|
279 |
|
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|
280 |
ALWAYS_INLINE bool leftHandSideNeedsCopy(bool rightHasAssignments, bool rightIsPure) |
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281 |
{ |
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return (m_codeType != FunctionCode || m_codeBlock->needsFullScopeChain() || rightHasAssignments) && !rightIsPure; |
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|
283 |
} |
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|
284 |
|
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ALWAYS_INLINE PassRefPtr<RegisterID> emitNodeForLeftHandSide(ExpressionNode* n, bool rightHasAssignments, bool rightIsPure) |
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286 |
{ |
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287 |
if (leftHandSideNeedsCopy(rightHasAssignments, rightIsPure)) { |
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|
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PassRefPtr<RegisterID> dst = newTemporary(); |
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289 |
emitNode(dst.get(), n); |
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return dst; |
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|
291 |
} |
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|
292 |
|
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return PassRefPtr<RegisterID>(emitNode(n)); |
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} |
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|
295 |
|
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296 |
RegisterID* emitLoad(RegisterID* dst, bool); |
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RegisterID* emitLoad(RegisterID* dst, double); |
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RegisterID* emitLoad(RegisterID* dst, const Identifier&); |
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RegisterID* emitLoad(RegisterID* dst, JSValue); |
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|
300 |
|
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301 |
RegisterID* emitUnaryOp(OpcodeID, RegisterID* dst, RegisterID* src); |
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RegisterID* emitBinaryOp(OpcodeID, RegisterID* dst, RegisterID* src1, RegisterID* src2, OperandTypes); |
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303 |
RegisterID* emitEqualityOp(OpcodeID, RegisterID* dst, RegisterID* src1, RegisterID* src2); |
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|
304 |
RegisterID* emitUnaryNoDstOp(OpcodeID, RegisterID* src); |
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|
305 |
|
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|
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RegisterID* emitNewObject(RegisterID* dst); |
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|
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RegisterID* emitNewArray(RegisterID* dst, ElementNode*); // stops at first elision |
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|
308 |
|
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|
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RegisterID* emitNewFunction(RegisterID* dst, FunctionBodyNode* body); |
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|
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RegisterID* emitNewFunctionExpression(RegisterID* dst, FuncExprNode* func); |
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|
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RegisterID* emitNewRegExp(RegisterID* dst, RegExp* regExp); |
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|
312 |
|
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|
313 |
RegisterID* emitMove(RegisterID* dst, RegisterID* src); |
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|
314 |
|
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|
315 |
RegisterID* emitToJSNumber(RegisterID* dst, RegisterID* src) { return emitUnaryOp(op_to_jsnumber, dst, src); } |
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|
316 |
RegisterID* emitPreInc(RegisterID* srcDst); |
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|
317 |
RegisterID* emitPreDec(RegisterID* srcDst); |
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|
318 |
RegisterID* emitPostInc(RegisterID* dst, RegisterID* srcDst); |
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|
319 |
RegisterID* emitPostDec(RegisterID* dst, RegisterID* srcDst); |
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|
320 |
|
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|
321 |
RegisterID* emitInstanceOf(RegisterID* dst, RegisterID* value, RegisterID* base, RegisterID* basePrototype); |
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|
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RegisterID* emitTypeOf(RegisterID* dst, RegisterID* src) { return emitUnaryOp(op_typeof, dst, src); } |
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|
323 |
RegisterID* emitIn(RegisterID* dst, RegisterID* property, RegisterID* base) { return emitBinaryOp(op_in, dst, property, base, OperandTypes()); } |
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|
324 |
|
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|
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RegisterID* emitResolve(RegisterID* dst, const Identifier& property); |
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|
326 |
RegisterID* emitGetScopedVar(RegisterID* dst, size_t skip, int index, JSValue globalObject); |
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|
327 |
RegisterID* emitPutScopedVar(size_t skip, int index, RegisterID* value, JSValue globalObject); |
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|
328 |
|
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|
329 |
RegisterID* emitResolveBase(RegisterID* dst, const Identifier& property); |
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|
330 |
RegisterID* emitResolveWithBase(RegisterID* baseDst, RegisterID* propDst, const Identifier& property); |
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|
331 |
|
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|
332 |
void emitMethodCheck(); |
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|
333 |
|
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|
334 |
RegisterID* emitGetById(RegisterID* dst, RegisterID* base, const Identifier& property); |
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|
335 |
RegisterID* emitPutById(RegisterID* base, const Identifier& property, RegisterID* value); |
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|
336 |
RegisterID* emitDirectPutById(RegisterID* base, const Identifier& property, RegisterID* value); |
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|
337 |
RegisterID* emitDeleteById(RegisterID* dst, RegisterID* base, const Identifier&); |
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|
338 |
RegisterID* emitGetByVal(RegisterID* dst, RegisterID* base, RegisterID* property); |
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|
339 |
RegisterID* emitPutByVal(RegisterID* base, RegisterID* property, RegisterID* value); |
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|
340 |
RegisterID* emitDeleteByVal(RegisterID* dst, RegisterID* base, RegisterID* property); |
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|
341 |
RegisterID* emitPutByIndex(RegisterID* base, unsigned index, RegisterID* value); |
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|
342 |
RegisterID* emitPutGetter(RegisterID* base, const Identifier& property, RegisterID* value); |
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|
343 |
RegisterID* emitPutSetter(RegisterID* base, const Identifier& property, RegisterID* value); |
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|
344 |
|
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|
345 |
RegisterID* emitCall(RegisterID* dst, RegisterID* func, CallArguments&, unsigned divot, unsigned startOffset, unsigned endOffset); |
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|
346 |
RegisterID* emitCallEval(RegisterID* dst, RegisterID* func, CallArguments&, unsigned divot, unsigned startOffset, unsigned endOffset); |
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|
347 |
RegisterID* emitCallVarargs(RegisterID* dst, RegisterID* func, RegisterID* thisRegister, RegisterID* argCount, unsigned divot, unsigned startOffset, unsigned endOffset); |
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|
348 |
RegisterID* emitLoadVarargs(RegisterID* argCountDst, RegisterID* args); |
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|
349 |
|
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|
350 |
RegisterID* emitReturn(RegisterID* src); |
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|
351 |
RegisterID* emitEnd(RegisterID* src) { return emitUnaryNoDstOp(op_end, src); } |
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|
352 |
|
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|
353 |
RegisterID* emitConstruct(RegisterID* dst, RegisterID* func, CallArguments&, unsigned divot, unsigned startOffset, unsigned endOffset); |
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|
354 |
RegisterID* emitStrcat(RegisterID* dst, RegisterID* src, int count); |
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|
355 |
void emitToPrimitive(RegisterID* dst, RegisterID* src); |
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|
356 |
|
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|
357 |
PassRefPtr<Label> emitLabel(Label*); |
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|
358 |
PassRefPtr<Label> emitJump(Label* target); |
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Revision: 201037
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|
359 |
PassRefPtr<Label> emitJumpIfTrue(RegisterID* cond, Label* target); |
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|
360 |
PassRefPtr<Label> emitJumpIfFalse(RegisterID* cond, Label* target); |
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|
361 |
PassRefPtr<Label> emitJumpIfNotFunctionCall(RegisterID* cond, Label* target); |
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Revision: 201037
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|
362 |
PassRefPtr<Label> emitJumpIfNotFunctionApply(RegisterID* cond, Label* target); |
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Revision: 201037
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|
363 |
PassRefPtr<Label> emitJumpScopes(Label* target, int targetScopeDepth); |
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|
364 |
|
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Revision: 201037
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|
365 |
PassRefPtr<Label> emitJumpSubroutine(RegisterID* retAddrDst, Label*); |
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Revision: 201037
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|
366 |
void emitSubroutineReturn(RegisterID* retAddrSrc); |
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|
367 |
|
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Revision: 201037
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|
368 |
RegisterID* emitGetPropertyNames(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, Label* breakTarget); |
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Revision: 201037
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|
369 |
RegisterID* emitNextPropertyName(RegisterID* dst, RegisterID* base, RegisterID* i, RegisterID* size, RegisterID* iter, Label* target); |
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|
370 |
|
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Revision: 201037
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|
371 |
RegisterID* emitCatch(RegisterID*, Label* start, Label* end); |
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Revision: 201037
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|
372 |
void emitThrow(RegisterID* exc) |
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|
373 |
{ |
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|
374 |
m_usesExceptions = true; |
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|
375 |
emitUnaryNoDstOp(op_throw, exc); |
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|
376 |
} |
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|
377 |
|
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Revision: 201037
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|
378 |
RegisterID* emitNewError(RegisterID* dst, bool isReferenceError, JSValue message); |
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Revision: 201037
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|
379 |
void emitPushNewScope(RegisterID* dst, const Identifier& property, RegisterID* value); |
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|
380 |
|
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|
381 |
RegisterID* emitPushScope(RegisterID* scope); |
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Revision: 201037
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|
382 |
void emitPopScope(); |
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|
383 |
|
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Revision: 201037
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|
384 |
void emitDebugHook(DebugHookID, int firstLine, int lastLine); |
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Revision: 201037
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|
385 |
|
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Revision: 201037
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|
386 |
int scopeDepth() { return m_dynamicScopeDepth + m_finallyDepth; } |
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Revision: 201037
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|
387 |
bool hasFinaliser() { return m_finallyDepth != 0; } |
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Revision: 201037
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|
388 |
|
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Revision: 201037
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|
389 |
void pushFinallyContext(Label* target, RegisterID* returnAddrDst); |
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Revision: 201037
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|
390 |
void popFinallyContext(); |
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|
391 |
|
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Revision: 201037
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|
392 |
void pushOptimisedForIn(RegisterID* expectedBase, RegisterID* iter, RegisterID* index, RegisterID* propertyRegister) |
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|
393 |
{ |
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Revision: 201037
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|
394 |
ForInContext context = { expectedBase, iter, index, propertyRegister }; |
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Revision: 201037
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|
395 |
m_forInContextStack.append(context); |
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Revision: 201037
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|
396 |
} |
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Revision: 201037
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|
397 |
|
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Revision: 201037
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|
398 |
void popOptimisedForIn() |
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|
399 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
400 |
m_forInContextStack.removeLast(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
401 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
402 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
LabelScope* breakTarget(const Identifier&); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
LabelScope* continueTarget(const Identifier&); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
406 |
void beginSwitch(RegisterID*, SwitchInfo::SwitchType); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
407 |
void endSwitch(uint32_t clauseCount, RefPtr<Label>*, ExpressionNode**, Label* defaultLabel, int32_t min, int32_t range); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
CodeType codeType() const { return m_codeType; } |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
410 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
void setRegeneratingForExceptionInfo(CodeBlock* originalCodeBlock) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
m_regeneratingForExceptionInfo = true; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
m_codeBlockBeingRegeneratedFrom = originalCodeBlock; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
417 |
bool shouldEmitProfileHooks() { return m_shouldEmitProfileHooks; } |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
418 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
419 |
private: |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
420 |
void emitOpcode(OpcodeID); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
421 |
void retrieveLastBinaryOp(int& dstIndex, int& src1Index, int& src2Index); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
422 |
void retrieveLastUnaryOp(int& dstIndex, int& srcIndex); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
423 |
void rewindBinaryOp(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
424 |
void rewindUnaryOp(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
425 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
426 |
PassRefPtr<Label> emitComplexJumpScopes(Label* target, ControlFlowContext* topScope, ControlFlowContext* bottomScope); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
427 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
428 |
typedef HashMap<EncodedJSValue, unsigned, EncodedJSValueHash, EncodedJSValueHashTraits> JSValueMap; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
429 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
430 |
struct IdentifierMapIndexHashTraits { |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
431 |
typedef int TraitType; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
432 |
typedef IdentifierMapIndexHashTraits StorageTraits; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
433 |
static int emptyValue() { return std::numeric_limits<int>::max(); } |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
434 |
static const bool emptyValueIsZero = false; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
435 |
static const bool needsDestruction = false; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
436 |
static const bool needsRef = false; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
437 |
}; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
438 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
439 |
typedef HashMap<RefPtr<UString::Rep>, int, IdentifierRepHash, HashTraits<RefPtr<UString::Rep> >, IdentifierMapIndexHashTraits> IdentifierMap; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
440 |
typedef HashMap<double, JSValue> NumberMap; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
441 |
typedef HashMap<UString::Rep*, JSString*, IdentifierRepHash> IdentifierStringMap; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
442 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
443 |
RegisterID* emitCall(OpcodeID, RegisterID* dst, RegisterID* func, CallArguments&, unsigned divot, unsigned startOffset, unsigned endOffset); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
444 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
445 |
RegisterID* newRegister(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
446 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
447 |
// Adds a var slot and maps it to the name ident in symbolTable(). |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
448 |
RegisterID* addVar(const Identifier& ident, bool isConstant) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
449 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
450 |
RegisterID* local; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
451 |
addVar(ident, isConstant, local); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
452 |
return local; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
453 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
454 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
455 |
// Ditto. Returns true if a new RegisterID was added, false if a pre-existing RegisterID was re-used. |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
456 |
bool addVar(const Identifier&, bool isConstant, RegisterID*&); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
457 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
458 |
// Adds an anonymous var slot. To give this slot a name, add it to symbolTable(). |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
459 |
RegisterID* addVar() |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
460 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
461 |
++m_codeBlock->m_numVars; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
462 |
return newRegister(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
463 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
464 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
465 |
// Returns the RegisterID corresponding to ident. |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
466 |
RegisterID* addGlobalVar(const Identifier& ident, bool isConstant) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
467 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
468 |
RegisterID* local; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
469 |
addGlobalVar(ident, isConstant, local); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
470 |
return local; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
471 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
472 |
// Returns true if a new RegisterID was added, false if a pre-existing RegisterID was re-used. |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
473 |
bool addGlobalVar(const Identifier&, bool isConstant, RegisterID*&); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
474 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
475 |
void addParameter(const Identifier&, int parameterIndex); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
476 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
477 |
void preserveLastVar(); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
478 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
479 |
RegisterID& registerFor(int index) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
480 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
481 |
if (index >= 0) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
482 |
return m_calleeRegisters[index]; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
483 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
484 |
if (m_parameters.size()) { |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
485 |
ASSERT(!m_globals.size()); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
486 |
return m_parameters[index + m_parameters.size() + RegisterFile::CallFrameHeaderSize]; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
487 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
488 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
489 |
return m_globals[-index - 1]; |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
490 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
491 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
492 |
unsigned addConstant(const Identifier&); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
493 |
RegisterID* addConstantValue(JSValue); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
494 |
unsigned addRegExp(RegExp*); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
495 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
496 |
PassRefPtr<FunctionExecutable> makeFunction(ExecState* exec, FunctionBodyNode* body) |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
497 |
{ |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
498 |
return FunctionExecutable::create(exec, body->ident(), body->source(), body->usesArguments(), body->parameters(), body->lineNo(), body->lastLine()); |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
499 |
} |
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
500 |
|
4f2f89ce4247
Revision: 201037
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
501 |
PassRefPtr<FunctionExecutable> makeFunction(JSGlobalData* globalData, FunctionBodyNode* body) |
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Revision: 201037
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502 |
{ |
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return FunctionExecutable::create(globalData, body->ident(), body->source(), body->usesArguments(), body->parameters(), body->lineNo(), body->lastLine()); |
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} |
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|
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Vector<Instruction>& instructions() { return m_codeBlock->instructions(); } |
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SymbolTable& symbolTable() { return *m_symbolTable; } |
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bool shouldOptimizeLocals() { return (m_codeType != EvalCode) && !m_dynamicScopeDepth; } |
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bool canOptimizeNonLocals() { return (m_codeType == FunctionCode) && !m_dynamicScopeDepth && !m_codeBlock->usesEval(); } |
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511 |
|
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RegisterID* emitThrowExpressionTooDeepException(); |
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|
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void createArgumentsIfNecessary(); |
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|
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bool m_shouldEmitDebugHooks; |
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bool m_shouldEmitProfileHooks; |
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518 |
|
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const ScopeChain* m_scopeChain; |
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SymbolTable* m_symbolTable; |
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521 |
|
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ScopeNode* m_scopeNode; |
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CodeBlock* m_codeBlock; |
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|
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// Some of these objects keep pointers to one another. They are arranged |
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// to ensure a sane destruction order that avoids references to freed memory. |
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HashSet<RefPtr<UString::Rep>, IdentifierRepHash> m_functions; |
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RegisterID m_ignoredResultRegister; |
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RegisterID m_thisRegister; |
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RegisterID* m_activationRegister; |
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SegmentedVector<RegisterID, 32> m_constantPoolRegisters; |
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SegmentedVector<RegisterID, 32> m_calleeRegisters; |
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SegmentedVector<RegisterID, 32> m_parameters; |
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SegmentedVector<RegisterID, 32> m_globals; |
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SegmentedVector<Label, 32> m_labels; |
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SegmentedVector<LabelScope, 8> m_labelScopes; |
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RefPtr<RegisterID> m_lastVar; |
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int m_finallyDepth; |
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int m_dynamicScopeDepth; |
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int m_baseScopeDepth; |
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CodeType m_codeType; |
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|
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Vector<ControlFlowContext> m_scopeContextStack; |
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Vector<SwitchInfo> m_switchContextStack; |
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Revision: 201037
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Vector<ForInContext> m_forInContextStack; |
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|
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int m_nextGlobalIndex; |
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int m_firstConstantIndex; |
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int m_nextConstantOffset; |
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unsigned m_globalConstantIndex; |
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|
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Revision: 201037
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int m_globalVarStorageOffset; |
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|
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Revision: 201037
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// Constant pool |
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IdentifierMap m_identifierMap; |
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Revision: 201037
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JSValueMap m_jsValueMap; |
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Revision: 201037
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NumberMap m_numberMap; |
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Revision: 201037
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IdentifierStringMap m_stringMap; |
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|
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|
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Revision: 201037
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JSGlobalData* m_globalData; |
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|
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|
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Revision: 201037
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OpcodeID m_lastOpcodeID; |
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Revision: 201037
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|
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|
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Revision: 201037
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|
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unsigned m_emitNodeDepth; |
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Revision: 201037
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|
565 |
|
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Revision: 201037
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|
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bool m_usesExceptions; |
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Revision: 201037
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|
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bool m_regeneratingForExceptionInfo; |
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Revision: 201037
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|
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CodeBlock* m_codeBlockBeingRegeneratedFrom; |
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Revision: 201037
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|
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|
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Revision: 201037
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static const unsigned s_maxEmitNodeDepth = 5000; |
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Revision: 201037
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}; |
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Revision: 201037
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|
572 |
|
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|
573 |
} |
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Revision: 201037
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|
574 |
|
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Revision: 201037
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|
575 |
#endif // BytecodeGenerator_h |