src/third_party/WebKit/Source/JavaScriptCore/jit/JITCall32_64.cpp - cobalt - Git at Google

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"

 #if ENABLE(JIT)
 #if USE(JSVALUE32_64)
 #include "JIT.h"

 #include "Arguments.h"
 #include "CodeBlock.h"
 #include "Interpreter.h"
 #include "JITInlines.h"
 #include "JITStubCall.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "ResultType.h"
 #include "SamplingTool.h"

 #ifndef NDEBUG
 #include <stdio.h>
 #endif

 using namespace std;

 namespace JSC {

 void JIT::emit_op_call_put_result(Instruction* instruction)
 {
     int dst = instruction[1].u.operand;
     emitValueProfilingSite();
     emitStore(dst, regT1, regT0);
 }

 void JIT::emit_op_ret(Instruction* currentInstruction)
 {
     unsigned dst = currentInstruction[1].u.operand;

     emitLoad(dst, regT1, regT0);
     emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
     emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

     restoreReturnAddressBeforeReturn(regT2);
     ret();
 }

 void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction)
 {
     unsigned result = currentInstruction[1].u.operand;
     unsigned thisReg = currentInstruction[2].u.operand;

     emitLoad(result, regT1, regT0);
     Jump notJSCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
     loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
     Jump notObject = emitJumpIfNotObject(regT2);

     emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
     emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

     restoreReturnAddressBeforeReturn(regT2);
     ret();

     notJSCell.link(this);
     notObject.link(this);
     emitLoad(thisReg, regT1, regT0);

     emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
     emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

     restoreReturnAddressBeforeReturn(regT2);
     ret();
 }

 void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
 }

 void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     compileOpCallSlowCase(op_call_eval, currentInstruction, iter, m_callLinkInfoIndex);
 }

 void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     compileOpCallSlowCase(op_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
 }

 void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
     compileOpCallSlowCase(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
 }

 void JIT::emit_op_call(Instruction* currentInstruction)
 {
     compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
 }

 void JIT::emit_op_call_eval(Instruction* currentInstruction)
 {
     compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
 }

 void JIT::emit_op_call_varargs(Instruction* currentInstruction)
 {
     compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
 }

 void JIT::emit_op_construct(Instruction* currentInstruction)
 {
     compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
 }

 void JIT::compileLoadVarargs(Instruction* instruction)
 {
     int thisValue = instruction[2].u.operand;
     int arguments = instruction[3].u.operand;
     int firstFreeRegister = instruction[4].u.operand;

     JumpList slowCase;
     JumpList end;
     bool canOptimize = m_codeBlock->usesArguments()
         && arguments == m_codeBlock->argumentsRegister()
         && !m_codeBlock->symbolTable()->slowArguments();

     if (canOptimize) {
         emitLoadTag(arguments, regT1);
         slowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag)));

         load32(payloadFor(JSStack::ArgumentCount), regT2);
         slowCase.append(branch32(Above, regT2, TrustedImm32(Arguments::MaxArguments + 1)));
         // regT2: argumentCountIncludingThis

         move(regT2, regT3);
         add32(TrustedImm32(firstFreeRegister + JSStack::CallFrameHeaderSize), regT3);
         lshift32(TrustedImm32(3), regT3);
         addPtr(callFrameRegister, regT3);
         // regT3: newCallFrame

         slowCase.append(branchPtr(Below, AbsoluteAddress(m_globalData->interpreter->stack().addressOfEnd()), regT3));

         // Initialize ArgumentCount.
         store32(regT2, payloadFor(JSStack::ArgumentCount, regT3));

         // Initialize 'this'.
         emitLoad(thisValue, regT1, regT0);
         store32(regT0, Address(regT3, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
         store32(regT1, Address(regT3, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));

         // Copy arguments.
         neg32(regT2);
         end.append(branchAdd32(Zero, TrustedImm32(1), regT2));
         // regT2: -argumentCount;

         Label copyLoop = label();
         load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))), regT0);
         load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))), regT1);
         store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
         store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
         branchAdd32(NonZero, TrustedImm32(1), regT2).linkTo(copyLoop, this);

         end.append(jump());
     }

     if (canOptimize)
         slowCase.link(this);

     JITStubCall stubCall(this, cti_op_load_varargs);
     stubCall.addArgument(thisValue);
     stubCall.addArgument(arguments);
     stubCall.addArgument(Imm32(firstFreeRegister));
     stubCall.call(regT3);

     if (canOptimize)
         end.link(this);
 }

 void JIT::compileCallEval()
 {
     JITStubCall stubCall(this, cti_op_call_eval); // Initializes ScopeChain; ReturnPC; CodeBlock.
     stubCall.call();
     addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
     emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

     sampleCodeBlock(m_codeBlock);
 }

 void JIT::compileCallEvalSlowCase(Vector<SlowCaseEntry>::iterator& iter)
 {
     linkSlowCase(iter);

     emitLoad(JSStack::Callee, regT1, regT0);
     emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());

     sampleCodeBlock(m_codeBlock);
 }

 void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
 {
     int callee = instruction[1].u.operand;

     /* Caller always:
         - Updates callFrameRegister to callee callFrame.
         - Initializes ArgumentCount; CallerFrame; Callee.

        For a JS call:
         - Caller initializes ScopeChain.
         - Callee initializes ReturnPC; CodeBlock.
         - Callee restores callFrameRegister before return.

        For a non-JS call:
         - Caller initializes ScopeChain; ReturnPC; CodeBlock.
         - Caller restores callFrameRegister after return.
     */

     if (opcodeID == op_call_varargs)
         compileLoadVarargs(instruction);
     else {
         int argCount = instruction[2].u.operand;
         int registerOffset = instruction[3].u.operand;

         if (opcodeID == op_call && canBeOptimized()) {
             emitLoad(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0, regT1);
             Jump done = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
             loadPtr(Address(regT1, JSCell::structureOffset()), regT1);
             storePtr(regT1, instruction[5].u.arrayProfile->addressOfLastSeenStructure());
             done.link(this);
         }

         addPtr(TrustedImm32(registerOffset * sizeof(Register)), callFrameRegister, regT3);

         store32(TrustedImm32(argCount), payloadFor(JSStack::ArgumentCount, regT3));
     } // regT3 holds newCallFrame with ArgumentCount initialized.

     storePtr(TrustedImmPtr(instruction), tagFor(JSStack::ArgumentCount, callFrameRegister));
     emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.

     storePtr(callFrameRegister, Address(regT3, JSStack::CallerFrame * static_cast<int>(sizeof(Register))));
     emitStore(JSStack::Callee, regT1, regT0, regT3);
     move(regT3, callFrameRegister);

     if (opcodeID == op_call_eval) {
         compileCallEval();
         return;
     }

     DataLabelPtr addressOfLinkedFunctionCheck;
     BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
     Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
     END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);

     addSlowCase(slowCase);
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));

     ASSERT(m_callStructureStubCompilationInfo.size() == callLinkInfoIndex);
     m_callStructureStubCompilationInfo.append(StructureStubCompilationInfo());
     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
     m_callStructureStubCompilationInfo[callLinkInfoIndex].callType = CallLinkInfo::callTypeFor(opcodeID);
     m_callStructureStubCompilationInfo[callLinkInfoIndex].bytecodeIndex = m_bytecodeOffset;

     loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scope)), regT1);
     emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain);
     m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();

     sampleCodeBlock(m_codeBlock);
 }

 void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction*, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
 {
     if (opcodeID == op_call_eval) {
         compileCallEvalSlowCase(iter);
         return;
     }

     linkSlowCase(iter);
     linkSlowCase(iter);

     m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());

     sampleCodeBlock(m_codeBlock);
 }

 } // namespace JSC

 #endif // USE(JSVALUE32_64)
 #endif // ENABLE(JIT)
	/*
	* Copyright (C) 2008 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"

	#if ENABLE(JIT)
	#if USE(JSVALUE32_64)
	#include "JIT.h"

	#include "Arguments.h"
	#include "CodeBlock.h"
	#include "Interpreter.h"
	#include "JITInlines.h"
	#include "JITStubCall.h"
	#include "JSArray.h"
	#include "JSFunction.h"
	#include "ResultType.h"
	#include "SamplingTool.h"

	#ifndef NDEBUG
	#include <stdio.h>
	#endif

	using namespace std;

	namespace JSC {

	void JIT::emit_op_call_put_result(Instruction* instruction)
	{
	int dst = instruction[1].u.operand;
	emitValueProfilingSite();
	emitStore(dst, regT1, regT0);
	}

	void JIT::emit_op_ret(Instruction* currentInstruction)
	{
	unsigned dst = currentInstruction[1].u.operand;

	emitLoad(dst, regT1, regT0);
	emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
	emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

	restoreReturnAddressBeforeReturn(regT2);
	ret();
	}

	void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction)
	{
	unsigned result = currentInstruction[1].u.operand;
	unsigned thisReg = currentInstruction[2].u.operand;

	emitLoad(result, regT1, regT0);
	Jump notJSCell = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
	loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
	Jump notObject = emitJumpIfNotObject(regT2);

	emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
	emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

	restoreReturnAddressBeforeReturn(regT2);
	ret();

	notJSCell.link(this);
	notObject.link(this);
	emitLoad(thisReg, regT1, regT0);

	emitGetFromCallFrameHeaderPtr(JSStack::ReturnPC, regT2);
	emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

	restoreReturnAddressBeforeReturn(regT2);
	ret();
	}

	void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
	{
	compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
	}

	void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
	{
	compileOpCallSlowCase(op_call_eval, currentInstruction, iter, m_callLinkInfoIndex);
	}

	void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
	{
	compileOpCallSlowCase(op_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
	}

	void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
	{
	compileOpCallSlowCase(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
	}

	void JIT::emit_op_call(Instruction* currentInstruction)
	{
	compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
	}

	void JIT::emit_op_call_eval(Instruction* currentInstruction)
	{
	compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
	}

	void JIT::emit_op_call_varargs(Instruction* currentInstruction)
	{
	compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
	}

	void JIT::emit_op_construct(Instruction* currentInstruction)
	{
	compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
	}

	void JIT::compileLoadVarargs(Instruction* instruction)
	{
	int thisValue = instruction[2].u.operand;
	int arguments = instruction[3].u.operand;
	int firstFreeRegister = instruction[4].u.operand;

	JumpList slowCase;
	JumpList end;
	bool canOptimize = m_codeBlock->usesArguments()
	&& arguments == m_codeBlock->argumentsRegister()
	&& !m_codeBlock->symbolTable()->slowArguments();

	if (canOptimize) {
	emitLoadTag(arguments, regT1);
	slowCase.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag)));

	load32(payloadFor(JSStack::ArgumentCount), regT2);
	slowCase.append(branch32(Above, regT2, TrustedImm32(Arguments::MaxArguments + 1)));
	// regT2: argumentCountIncludingThis

	move(regT2, regT3);
	add32(TrustedImm32(firstFreeRegister + JSStack::CallFrameHeaderSize), regT3);
	lshift32(TrustedImm32(3), regT3);
	addPtr(callFrameRegister, regT3);
	// regT3: newCallFrame

	slowCase.append(branchPtr(Below, AbsoluteAddress(m_globalData->interpreter->stack().addressOfEnd()), regT3));

	// Initialize ArgumentCount.
	store32(regT2, payloadFor(JSStack::ArgumentCount, regT3));

	// Initialize 'this'.
	emitLoad(thisValue, regT1, regT0);
	store32(regT0, Address(regT3, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
	store32(regT1, Address(regT3, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));

	// Copy arguments.
	neg32(regT2);
	end.append(branchAdd32(Zero, TrustedImm32(1), regT2));
	// regT2: -argumentCount;

	Label copyLoop = label();
	load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))), regT0);
	load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))), regT1);
	store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
	store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) +(CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
	branchAdd32(NonZero, TrustedImm32(1), regT2).linkTo(copyLoop, this);

	end.append(jump());
	}

	if (canOptimize)
	slowCase.link(this);

	JITStubCall stubCall(this, cti_op_load_varargs);
	stubCall.addArgument(thisValue);
	stubCall.addArgument(arguments);
	stubCall.addArgument(Imm32(firstFreeRegister));
	stubCall.call(regT3);

	if (canOptimize)
	end.link(this);
	}

	void JIT::compileCallEval()
	{
	JITStubCall stubCall(this, cti_op_call_eval); // Initializes ScopeChain; ReturnPC; CodeBlock.
	stubCall.call();
	addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
	emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);

	sampleCodeBlock(m_codeBlock);
	}

	void JIT::compileCallEvalSlowCase(Vector<SlowCaseEntry>::iterator& iter)
	{
	linkSlowCase(iter);

	emitLoad(JSStack::Callee, regT1, regT0);
	emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());

	sampleCodeBlock(m_codeBlock);
	}

	void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
	{
	int callee = instruction[1].u.operand;

	/* Caller always:
	- Updates callFrameRegister to callee callFrame.
	- Initializes ArgumentCount; CallerFrame; Callee.

	For a JS call:
	- Caller initializes ScopeChain.
	- Callee initializes ReturnPC; CodeBlock.
	- Callee restores callFrameRegister before return.

	For a non-JS call:
	- Caller initializes ScopeChain; ReturnPC; CodeBlock.
	- Caller restores callFrameRegister after return.
	*/

	if (opcodeID == op_call_varargs)
	compileLoadVarargs(instruction);
	else {
	int argCount = instruction[2].u.operand;
	int registerOffset = instruction[3].u.operand;

	if (opcodeID == op_call && canBeOptimized()) {
	emitLoad(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0, regT1);
	Jump done = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
	loadPtr(Address(regT1, JSCell::structureOffset()), regT1);
	storePtr(regT1, instruction[5].u.arrayProfile->addressOfLastSeenStructure());
	done.link(this);
	}

	addPtr(TrustedImm32(registerOffset * sizeof(Register)), callFrameRegister, regT3);

	store32(TrustedImm32(argCount), payloadFor(JSStack::ArgumentCount, regT3));
	} // regT3 holds newCallFrame with ArgumentCount initialized.

	storePtr(TrustedImmPtr(instruction), tagFor(JSStack::ArgumentCount, callFrameRegister));
	emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.

	storePtr(callFrameRegister, Address(regT3, JSStack::CallerFrame * static_cast<int>(sizeof(Register))));
	emitStore(JSStack::Callee, regT1, regT0, regT3);
	move(regT3, callFrameRegister);

	if (opcodeID == op_call_eval) {
	compileCallEval();
	return;
	}

	DataLabelPtr addressOfLinkedFunctionCheck;
	BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
	Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
	END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);

	addSlowCase(slowCase);
	addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));

	ASSERT(m_callStructureStubCompilationInfo.size() == callLinkInfoIndex);
	m_callStructureStubCompilationInfo.append(StructureStubCompilationInfo());
	m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
	m_callStructureStubCompilationInfo[callLinkInfoIndex].callType = CallLinkInfo::callTypeFor(opcodeID);
	m_callStructureStubCompilationInfo[callLinkInfoIndex].bytecodeIndex = m_bytecodeOffset;

	loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scope)), regT1);
	emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain);
	m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();

	sampleCodeBlock(m_codeBlock);
	}

	void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction*, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
	{
	if (opcodeID == op_call_eval) {
	compileCallEvalSlowCase(iter);
	return;
	}

	linkSlowCase(iter);
	linkSlowCase(iter);

	m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());

	sampleCodeBlock(m_codeBlock);
	}

	} // namespace JSC

	#endif // USE(JSVALUE32_64)
	#endif // ENABLE(JIT)