LinkBuffer should not keep a reference to the MacroAssembler
[WebKit-https.git] / Source / JavaScriptCore / jit / JITCall32_64.cpp
index 0ca2e0b..3a9feb2 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2013, 2014 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
 #if USE(JSVALUE32_64)
 #include "JIT.h"
 
+#include "Arguments.h"
 #include "CodeBlock.h"
 #include "Interpreter.h"
-#include "JITInlineMethods.h"
-#include "JITStubCall.h"
+#include "JITInlines.h"
 #include "JSArray.h"
 #include "JSFunction.h"
+#include "JSCInlines.h"
+#include "LinkBuffer.h"
+#include "RepatchBuffer.h"
 #include "ResultType.h"
 #include "SamplingTool.h"
+#include "StackAlignment.h"
+#include <wtf/StringPrintStream.h>
 
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;
 
 namespace JSC {
 
-void JIT::compileOpCallInitializeCallFrame()
-{
-    // regT0 holds callee, regT1 holds argCount
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT3); // scopeChain
-    emitPutIntToCallFrameHeader(regT1, RegisterFile::ArgumentCount);
-    emitPutCellToCallFrameHeader(regT0, RegisterFile::Callee);
-    emitPutCellToCallFrameHeader(regT3, RegisterFile::ScopeChain);
-}
-
-void JIT::emit_op_call_put_result(Instruction* instruction)
+void JIT::emitPutCallResult(Instruction* instruction)
 {
     int dst = instruction[1].u.operand;
+    emitValueProfilingSite();
     emitStore(dst, regT1, regT0);
 }
 
-void JIT::compileOpCallVarargs(Instruction* instruction)
-{
-    int callee = instruction[1].u.operand;
-    int argCountRegister = instruction[2].u.operand;
-    int registerOffset = instruction[3].u.operand;
-
-    emitLoad(callee, regT1, regT0);
-    emitLoadPayload(argCountRegister, regT2); // argCount
-    addPtr(Imm32(registerOffset), regT2, regT3); // registerOffset
-
-    emitJumpSlowCaseIfNotJSCell(callee, regT1);
-    addSlowCase(branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsFunctionVPtr)));
-
-    // Speculatively roll the callframe, assuming argCount will match the arity.
-    mul32(TrustedImm32(sizeof(Register)), regT3, regT3);
-    addPtr(callFrameRegister, regT3);
-    store32(TrustedImm32(JSValue::CellTag), tagFor(RegisterFile::CallerFrame, regT3));
-    storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame, regT3));
-    move(regT3, callFrameRegister);
-
-    move(regT2, regT1); // argCount
-
-    emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());
-
-    sampleCodeBlock(m_codeBlock);
-}
-
-void JIT::compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    int callee = instruction[1].u.operand;
-
-    linkSlowCaseIfNotJSCell(iter, callee);
-    linkSlowCase(iter);
-
-    JITStubCall stubCall(this, cti_op_call_NotJSFunction);
-    stubCall.addArgument(regT1, regT0);
-    stubCall.addArgument(regT3);
-    stubCall.addArgument(regT2);
-    stubCall.call();
-
-    sampleCodeBlock(m_codeBlock);
-}
-
 void JIT::emit_op_ret(Instruction* currentInstruction)
 {
-    emitOptimizationCheck(RetOptimizationCheck);
-    
     unsigned dst = currentInstruction[1].u.operand;
 
     emitLoad(dst, regT1, regT0);
-    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
-    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
 
-    restoreReturnAddressBeforeReturn(regT2);
+    checkStackPointerAlignment();
+    emitFunctionEpilogue();
     ret();
 }
 
 void JIT::emit_op_ret_object_or_this(Instruction* currentInstruction)
 {
-    emitOptimizationCheck(RetOptimizationCheck);
-    
     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);
+    Jump notObject = emitJumpIfCellNotObject(regT0);
 
-    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
-    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
-
-    restoreReturnAddressBeforeReturn(regT2);
+    checkStackPointerAlignment();
+    emitFunctionEpilogue();
     ret();
 
     notJSCell.link(this);
     notObject.link(this);
     emitLoad(thisReg, regT1, regT0);
 
-    emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
-    emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
-
-    restoreReturnAddressBeforeReturn(regT2);
+    checkStackPointerAlignment();
+    emitFunctionEpilogue();
     ret();
 }
 
 void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call);
+    compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
 }
 
 void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call_eval);
+    compileOpCallSlowCase(op_call_eval, currentInstruction, iter, m_callLinkInfoIndex);
 }
-
 void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    compileOpCallVarargsSlowCase(currentInstruction, iter);
+    compileOpCallSlowCase(op_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
 }
-
+    
+void JIT::emitSlow_op_construct_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    compileOpCallSlowCase(op_construct_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
+}
+    
 void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_construct);
+    compileOpCallSlowCase(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
 }
 
 void JIT::emit_op_call(Instruction* currentInstruction)
@@ -174,114 +118,291 @@ void JIT::emit_op_call(Instruction* currentInstruction)
 
 void JIT::emit_op_call_eval(Instruction* currentInstruction)
 {
-    compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex++);
+    compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
 }
 
 void JIT::emit_op_call_varargs(Instruction* currentInstruction)
 {
-    compileOpCallVarargs(currentInstruction);
+    compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
 }
-
+    
+void JIT::emit_op_construct_varargs(Instruction* currentInstruction)
+{
+    compileOpCall(op_construct_varargs, currentInstruction, m_callLinkInfoIndex++);
+}
+    
 void JIT::emit_op_construct(Instruction* currentInstruction)
 {
     compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
 }
 
-void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
+void JIT::compileLoadVarargs(Instruction* instruction)
 {
-    int callee = instruction[1].u.operand;
-    int argCount = instruction[2].u.operand;
-    int registerOffset = instruction[3].u.operand;
-
-    Jump wasEval;
-    if (opcodeID == op_call_eval) {
-        JITStubCall stubCall(this, cti_op_call_eval);
-        stubCall.addArgument(callee);
-        stubCall.addArgument(JIT::Imm32(registerOffset));
-        stubCall.addArgument(JIT::Imm32(argCount));
-        stubCall.call();
-        wasEval = branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag));
+    int thisValue = instruction[3].u.operand;
+    int arguments = instruction[4].u.operand;
+    int firstFreeRegister = instruction[5].u.operand;
+    int firstVarArgOffset = instruction[6].u.operand;
+
+    JumpList slowCase;
+    JumpList end;
+    bool canOptimize = m_codeBlock->usesArguments()
+        && VirtualRegister(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);
+        if (firstVarArgOffset) {
+            Jump sufficientArguments = branch32(GreaterThan, regT2, TrustedImm32(firstVarArgOffset + 1));
+            move(TrustedImm32(1), regT2);
+            Jump endVarArgs = jump();
+            sufficientArguments.link(this);
+            sub32(TrustedImm32(firstVarArgOffset), regT2);
+            endVarArgs.link(this);
+        }
+        slowCase.append(branch32(Above, regT2, TrustedImm32(Arguments::MaxArguments + 1)));
+        // regT2: argumentCountIncludingThis
+
+        move(regT2, regT3);
+        addPtr(TrustedImm32(-firstFreeRegister + JSStack::CallFrameHeaderSize), regT3);
+        // regT1 now has the required frame size in Register units
+        // Round regT1 to next multiple of stackAlignmentRegisters()
+        addPtr(TrustedImm32(stackAlignmentRegisters() - 1), regT3);
+        andPtr(TrustedImm32(~(stackAlignmentRegisters() - 1)), regT3);
+        neg32(regT3);
+        lshift32(TrustedImm32(3), regT3);
+        addPtr(callFrameRegister, regT3);
+        // regT3: newCallFrame
+
+        slowCase.append(branchPtr(Above, AbsoluteAddress(m_vm->addressOfStackLimit()), 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.
+        end.append(branchSub32(Zero, TrustedImm32(1), regT2));
+        // regT2: argumentCount;
+
+        Label copyLoop = label();
+        load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) +((CallFrame::thisArgumentOffset() + firstVarArgOffset) * static_cast<int>(sizeof(Register)))), regT0);
+        load32(BaseIndex(callFrameRegister, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) +((CallFrame::thisArgumentOffset() + firstVarArgOffset) * 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)))));
+        branchSub32(NonZero, TrustedImm32(1), regT2).linkTo(copyLoop, this);
+
+        end.append(jump());
     }
 
-    emitLoad(callee, regT1, regT0);
-
-    DataLabelPtr addressOfLinkedFunctionCheck;
+    if (canOptimize)
+        slowCase.link(this);
 
-    BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+    emitLoad(arguments, regT1, regT0);
+    callOperation(operationSizeFrameForVarargs, regT1, regT0, firstFreeRegister, firstVarArgOffset);
+    addPtr(TrustedImm32(-sizeof(CallerFrameAndPC)), returnValueGPR, stackPointerRegister);
+    emitLoad(thisValue, regT1, regT4);
+    emitLoad(arguments, regT3, regT2);
+    callOperation(operationLoadVarargs, returnValueGPR, regT1, regT4, regT3, regT2, firstVarArgOffset);
+    move(returnValueGPR, regT3);
 
-    Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
+    if (canOptimize)
+        end.link(this);
 
-    END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+    addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT3, stackPointerRegister);
+}
 
-    addSlowCase(jumpToSlow);
-    ASSERT_JIT_OFFSET(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow), patchOffsetOpCallCompareToJump);
-    ASSERT(m_callStructureStubCompilationInfo.size() == callLinkInfoIndex);
-    m_callStructureStubCompilationInfo.append(StructureStubCompilationInfo());
-    m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
-    m_callStructureStubCompilationInfo[callLinkInfoIndex].isCall = opcodeID != op_construct;
+void JIT::compileCallEval(Instruction* instruction)
+{
+    addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
 
-    addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
+    callOperationNoExceptionCheck(operationCallEval, regT1);
 
-    // The following is the fast case, only used whan a callee can be linked.
+    Jump noException = emitExceptionCheck(InvertedExceptionCheck);
+    addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+    exceptionCheck(jump());
 
-    // Fast version of stack frame initialization, directly relative to edi.
-    // Note that this omits to set up RegisterFile::CodeBlock, which is set in the callee
-    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT2);
+    noException.link(this);
+    addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
 
-    store32(TrustedImm32(JSValue::Int32Tag), tagFor(registerOffset + RegisterFile::ArgumentCount));
-    store32(Imm32(argCount), payloadFor(registerOffset + RegisterFile::ArgumentCount));
-    storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
-    emitStore(registerOffset + RegisterFile::Callee, regT1, regT0);
-    store32(TrustedImm32(JSValue::CellTag), tagFor(registerOffset + RegisterFile::ScopeChain));
-    store32(regT2, payloadFor(registerOffset + RegisterFile::ScopeChain));
-    addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
+    addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+    checkStackPointerAlignment();
 
-    // Call to the callee
-    m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+    sampleCodeBlock(m_codeBlock);
     
-    if (opcodeID == op_call_eval)
-        wasEval.link(this);
+    emitPutCallResult(instruction);
+}
+
+void JIT::compileCallEvalSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    linkSlowCase(iter);
+
+    loadPtr(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT0);
+    loadPtr(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT1);
+    move(TrustedImmPtr(&CallLinkInfo::dummy()), regT2);
+
+    emitLoad(JSStack::Callee, regT1, regT0);
+    emitNakedCall(m_vm->getCTIStub(virtualCallThunkGenerator).code());
+    addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+    checkStackPointerAlignment();
 
     sampleCodeBlock(m_codeBlock);
+    
+    emitPutCallResult(instruction);
 }
 
-void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
 {
-    int callee = instruction[1].u.operand;
-    int argCount = instruction[2].u.operand;
-    int registerOffset = instruction[3].u.operand;
+    int callee = instruction[2].u.operand;
 
-    linkSlowCase(iter);
-    linkSlowCase(iter);
+    /* Caller always:
+        - Updates callFrameRegister to callee callFrame.
+        - Initializes ArgumentCount; CallerFrame; Callee.
 
-    // Fast check for JS function.
-    Jump callLinkFailNotObject = branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag));
-    Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsFunctionVPtr));
+       For a JS call:
+        - Caller initializes ScopeChain.
+        - Callee initializes ReturnPC; CodeBlock.
+        - Callee restores callFrameRegister before return.
 
-    // Speculatively roll the callframe, assuming argCount will match the arity.
-    store32(TrustedImm32(JSValue::CellTag), tagFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
-    storePtr(callFrameRegister, payloadFor(RegisterFile::CallerFrame + registerOffset, callFrameRegister));
-    addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
-    move(Imm32(argCount), regT1);
+       For a non-JS call:
+        - Caller initializes ScopeChain; ReturnPC; CodeBlock.
+        - Caller restores callFrameRegister after return.
+    */
+    
+    if (opcodeID == op_call_varargs || opcodeID == op_construct_varargs)
+        compileLoadVarargs(instruction);
+    else {
+        int argCount = instruction[3].u.operand;
+        int registerOffset = -instruction[4].u.operand;
+        
+        if (opcodeID == op_call && shouldEmitProfiling()) {
+            emitLoad(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0, regT1);
+            Jump done = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
+            loadPtr(Address(regT1, JSCell::structureIDOffset()), regT1);
+            storePtr(regT1, instruction[OPCODE_LENGTH(op_call) - 2].u.arrayProfile->addressOfLastSeenStructureID());
+            done.link(this);
+        }
+    
+        addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
 
-    m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
+        store32(TrustedImm32(argCount), Address(stackPointerRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
+    } // SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
+    
+    uint32_t locationBits = CallFrame::Location::encodeAsBytecodeInstruction(instruction);
+    store32(TrustedImm32(locationBits), tagFor(JSStack::ArgumentCount, callFrameRegister));
+    emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.
 
-    // Done! - return back to the hot path.
-    ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
-    ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct));
-    emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
+    store32(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
+    store32(regT1, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC)));
 
-    // This handles host functions
-    callLinkFailNotObject.link(this);
-    callLinkFailNotJSFunction.link(this);
+    if (opcodeID == op_call_eval) {
+        compileCallEval(instruction);
+        return;
+    }
+
+    addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
+
+    DataLabelPtr addressOfLinkedFunctionCheck;
+    Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
+
+    addSlowCase(slowCase);
 
-    JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
-    stubCall.addArgument(callee);
-    stubCall.addArgument(JIT::Imm32(registerOffset));
-    stubCall.addArgument(JIT::Imm32(argCount));
-    stubCall.call();
+    ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
+    CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
+    info->callType = CallLinkInfo::callTypeFor(opcodeID);
+    info->codeOrigin = CodeOrigin(m_bytecodeOffset);
+    info->calleeGPR = regT0;
+    m_callCompilationInfo.append(CallCompilationInfo());
+    m_callCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
+    m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
+
+    loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scope)), regT2);
+    store32(regT2, Address(MacroAssembler::stackPointerRegister, JSStack::ScopeChain * sizeof(Register) + PayloadOffset - sizeof(CallerFrameAndPC)));
+    store32(TrustedImm32(JSValue::CellTag), Address(stackPointerRegister, JSStack::ScopeChain * sizeof(Register) + TagOffset - sizeof(CallerFrameAndPC)));
+
+    checkStackPointerAlignment();
+    m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+
+    addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+    checkStackPointerAlignment();
 
     sampleCodeBlock(m_codeBlock);
+    emitPutCallResult(instruction);
+}
+
+void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
+{
+    if (opcodeID == op_call_eval) {
+        compileCallEvalSlowCase(instruction, iter);
+        return;
+    }
+
+    linkSlowCase(iter);
+    linkSlowCase(iter);
+
+    ThunkGenerator generator = linkThunkGeneratorFor(
+        (opcodeID == op_construct || opcodeID == op_construct_varargs) ? CodeForConstruct : CodeForCall,
+        RegisterPreservationNotRequired);
+    
+    move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
+    m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_vm->getCTIStub(generator).code());
+
+    addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+    checkStackPointerAlignment();
+
+    sampleCodeBlock(m_codeBlock);
+    emitPutCallResult(instruction);
+}
+
+void JIT::privateCompileClosureCall(CallLinkInfo* callLinkInfo, CodeBlock* calleeCodeBlock, Structure* expectedStructure, ExecutableBase* expectedExecutable, MacroAssemblerCodePtr codePtr)
+{
+    JumpList slowCases;
+
+    slowCases.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
+    slowCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), TrustedImmPtr(expectedStructure)));
+    slowCases.append(branchPtr(NotEqual, Address(regT0, JSFunction::offsetOfExecutable()), TrustedImmPtr(expectedExecutable)));
+    
+    loadPtr(Address(regT0, JSFunction::offsetOfScopeChain()), regT1);
+    emitPutCellToCallFrameHeader(regT1, JSStack::ScopeChain);
+    
+    Call call = nearCall();
+    Jump done = jump();
+    
+    slowCases.link(this);
+    move(TrustedImmPtr(callLinkInfo->callReturnLocation.executableAddress()), regT2);
+    restoreReturnAddressBeforeReturn(regT2);
+    Jump slow = jump();
+    
+    LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock);
+    
+    patchBuffer.link(call, FunctionPtr(codePtr.executableAddress()));
+    patchBuffer.link(done, callLinkInfo->hotPathOther.labelAtOffset(0));
+    patchBuffer.link(slow, CodeLocationLabel(m_vm->getCTIStub(virtualCallThunkGenerator).code()));
+    
+    RefPtr<ClosureCallStubRoutine> stubRoutine = adoptRef(new ClosureCallStubRoutine(
+        FINALIZE_CODE(
+            patchBuffer,
+            ("Baseline closure call stub for %s, return point %p, target %p (%s)",
+                toCString(*m_codeBlock).data(),
+                callLinkInfo->hotPathOther.labelAtOffset(0).executableAddress(),
+                codePtr.executableAddress(),
+                toCString(pointerDump(calleeCodeBlock)).data())),
+        *m_vm, m_codeBlock->ownerExecutable(), expectedStructure, expectedExecutable,
+        callLinkInfo->codeOrigin));
+    
+    RepatchBuffer repatchBuffer(m_codeBlock);
+    
+    repatchBuffer.replaceWithJump(
+        RepatchBuffer::startOfBranchPtrWithPatchOnRegister(callLinkInfo->hotPathBegin),
+        CodeLocationLabel(stubRoutine->code().code()));
+    repatchBuffer.relink(callLinkInfo->callReturnLocation, m_vm->getCTIStub(virtualCallThunkGenerator).code());
+    
+    callLinkInfo->stub = stubRoutine.release();
 }
 
 } // namespace JSC