/*
- * 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
*/
#include "config.h"
-#include "JIT.h"
#if ENABLE(JIT)
+#if USE(JSVALUE64)
+#include "JIT.h"
+#include "Arguments.h"
#include "CodeBlock.h"
-#include "JITInlineMethods.h"
+#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "Interpreter.h"
+#include "JSCInlines.h"
+#include "LinkBuffer.h"
+#include "RepatchBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
+#include "StackAlignment.h"
+#include "ThunkGenerators.h"
+#include <wtf/StringPrintStream.h>
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;
namespace JSC {
-void JIT::unlinkCall(CallLinkInfo* callLinkInfo)
+void JIT::emitPutCallResult(Instruction* instruction)
{
- // When the JSFunction is deleted the pointer embedded in the instruction stream will no longer be valid
- // (and, if a new JSFunction happened to be constructed at the same location, we could get a false positive
- // match). Reset the check so it no longer matches.
- DataLabelPtr::patch(callLinkInfo->hotPathBegin, JSValuePtr::encode(jsImpossibleValue()));
+ int dst = instruction[1].u.operand;
+ emitValueProfilingSite();
+ emitPutVirtualRegister(dst);
}
-void JIT::linkCall(JSFunction* callee, CodeBlock* calleeCodeBlock, void* ctiCode, CallLinkInfo* callLinkInfo, int callerArgCount)
+void JIT::compileLoadVarargs(Instruction* instruction)
{
- // Currently we only link calls with the exact number of arguments.
- if (callerArgCount == calleeCodeBlock->m_numParameters) {
- ASSERT(!callLinkInfo->isLinked());
-
- calleeCodeBlock->addCaller(callLinkInfo);
-
- DataLabelPtr::patch(callLinkInfo->hotPathBegin, callee);
- Jump::patch(callLinkInfo->hotPathOther, ctiCode);
+ 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()
+ && arguments == m_codeBlock->argumentsRegister().offset()
+ && !m_codeBlock->symbolTable()->slowArguments();
+
+ if (canOptimize) {
+ emitGetVirtualRegister(arguments, regT0);
+ slowCase.append(branch64(NotEqual, regT0, TrustedImm64(JSValue::encode(JSValue()))));
+
+ emitGetFromCallFrameHeader32(JSStack::ArgumentCount, regT0);
+ if (firstVarArgOffset) {
+ Jump sufficientArguments = branch32(GreaterThan, regT0, TrustedImm32(firstVarArgOffset + 1));
+ move(TrustedImm32(1), regT0);
+ Jump endVarArgs = jump();
+ sufficientArguments.link(this);
+ sub32(TrustedImm32(firstVarArgOffset), regT0);
+ endVarArgs.link(this);
+ }
+ slowCase.append(branch32(Above, regT0, TrustedImm32(Arguments::MaxArguments + 1)));
+ // regT0: argumentCountIncludingThis
+ move(regT0, regT1);
+ add64(TrustedImm32(-firstFreeRegister + JSStack::CallFrameHeaderSize), regT1);
+ // regT1 now has the required frame size in Register units
+ // Round regT1 to next multiple of stackAlignmentRegisters()
+ add64(TrustedImm32(stackAlignmentRegisters() - 1), regT1);
+ and64(TrustedImm32(~(stackAlignmentRegisters() - 1)), regT1);
+
+ neg64(regT1);
+ lshift64(TrustedImm32(3), regT1);
+ addPtr(callFrameRegister, regT1);
+ // regT1: newCallFrame
+
+ slowCase.append(branchPtr(Above, AbsoluteAddress(m_vm->addressOfStackLimit()), regT1));
+
+ // Initialize ArgumentCount.
+ store32(regT0, Address(regT1, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
+
+ // Initialize 'this'.
+ emitGetVirtualRegister(thisValue, regT2);
+ store64(regT2, Address(regT1, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))));
+
+ // Copy arguments.
+ signExtend32ToPtr(regT0, regT0);
+ end.append(branchSub64(Zero, TrustedImm32(1), regT0));
+ // regT0: argumentCount
+
+ Label copyLoop = label();
+ load64(BaseIndex(callFrameRegister, regT0, TimesEight, (CallFrame::thisArgumentOffset() + firstVarArgOffset) * static_cast<int>(sizeof(Register))), regT2);
+ store64(regT2, BaseIndex(regT1, regT0, TimesEight, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))));
+ branchSub64(NonZero, TrustedImm32(1), regT0).linkTo(copyLoop, this);
+
+ end.append(jump());
}
- // patch the instruction that jumps out to the cold path, so that we only try to link once.
- void* patchCheck = reinterpret_cast<void*>(reinterpret_cast<ptrdiff_t>(callLinkInfo->hotPathBegin) + patchOffsetOpCallCompareToJump);
- Jump::patch(patchCheck, callLinkInfo->coldPathOther);
+ if (canOptimize)
+ slowCase.link(this);
+
+ emitGetVirtualRegister(arguments, regT1);
+ callOperation(operationSizeFrameForVarargs, regT1, firstFreeRegister, firstVarArgOffset);
+ move(returnValueGPR, stackPointerRegister);
+ emitGetVirtualRegister(thisValue, regT1);
+ emitGetVirtualRegister(arguments, regT2);
+ callOperation(operationLoadVarargs, returnValueGPR, regT1, regT2, firstVarArgOffset);
+ move(returnValueGPR, regT1);
+
+ if (canOptimize)
+ end.link(this);
+
+ addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
}
-void JIT::compileOpCallInitializeCallFrame()
+void JIT::compileCallEval(Instruction* instruction)
{
- store32(X86::edx, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
+ addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
+ callOperationNoExceptionCheck(operationCallEval, regT1);
- loadPtr(Address(X86::ecx, FIELD_OFFSET(JSFunction, m_scopeChain) + FIELD_OFFSET(ScopeChain, m_node)), X86::edx); // newScopeChain
+ Jump noException = emitExceptionCheck(InvertedExceptionCheck);
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ exceptionCheck(jump());
- storePtr(ImmPtr(JSValuePtr::encode(noValue())), Address(callFrameRegister, RegisterFile::OptionalCalleeArguments * static_cast<int>(sizeof(Register))));
- storePtr(X86::ecx, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register))));
- storePtr(X86::edx, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register))));
-}
+ noException.link(this);
+ addSlowCase(branch64(Equal, regT0, TrustedImm64(JSValue::encode(JSValue()))));
-void JIT::compileOpCallSetupArgs(Instruction* instruction)
-{
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
- // ecx holds func
- emitPutJITStubArg(X86::ecx, 1);
- emitPutJITStubArgConstant(registerOffset, 2);
- emitPutJITStubArgConstant(argCount, 3);
+ sampleCodeBlock(m_codeBlock);
+
+ emitPutCallResult(instruction);
}
-void JIT::compileOpCallEvalSetupArgs(Instruction* instruction)
+void JIT::compileCallEvalSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
+ linkSlowCase(iter);
- // ecx holds func
- emitPutJITStubArg(X86::ecx, 1);
- emitPutJITStubArgConstant(registerOffset, 2);
- emitPutJITStubArgConstant(argCount, 3);
-}
+ load64(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT0);
+ move(TrustedImmPtr(&CallLinkInfo::dummy()), regT2);
+ emitNakedCall(m_vm->getCTIStub(virtualCallThunkGenerator).code());
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
-void JIT::compileOpConstructSetupArgs(Instruction* instruction)
-{
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
- int proto = instruction[5].u.operand;
- int thisRegister = instruction[6].u.operand;
-
- // ecx holds func
- emitPutJITStubArg(X86::ecx, 1);
- emitPutJITStubArgConstant(registerOffset, 2);
- emitPutJITStubArgConstant(argCount, 3);
- emitPutJITStubArgFromVirtualRegister(proto, 4, X86::eax);
- emitPutJITStubArgConstant(thisRegister, 5);
+ sampleCodeBlock(m_codeBlock);
+
+ emitPutCallResult(instruction);
}
-#if !ENABLE(JIT_OPTIMIZE_CALL)
-
-void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
+void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
{
- int dst = instruction[1].u.operand;
int callee = instruction[2].u.operand;
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
- // Handle eval
- Jump wasEval;
- if (opcodeID == op_call_eval) {
- emitGetVirtualRegister(callee, X86::ecx);
- compileOpCallEvalSetupArgs(instruction);
+ /* 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.
+ */
+ COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct), call_and_construct_opcodes_must_be_same_length);
+ COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_varargs), call_and_call_varargs_opcodes_must_be_same_length);
+ COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_construct_varargs), call_and_construct_varargs_opcodes_must_be_same_length);
+ 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()) {
+ emitGetVirtualRegister(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0);
+ Jump done = emitJumpIfNotJSCell(regT0);
+ load32(Address(regT0, JSCell::structureIDOffset()), regT0);
+ store32(regT0, instruction[OPCODE_LENGTH(op_call) - 2].u.arrayProfile->addressOfLastSeenStructureID());
+ done.link(this);
+ }
+
+ addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
+ 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 bytecodeOffset = instruction - m_codeBlock->instructions().begin();
+ uint32_t locationBits = CallFrame::Location::encodeAsBytecodeOffset(bytecodeOffset);
+ store32(TrustedImm32(locationBits), Address(callFrameRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + TagOffset));
+ emitGetVirtualRegister(callee, regT0); // regT0 holds callee.
- emitCTICall(Interpreter::cti_op_call_eval);
- wasEval = jnePtr(X86::eax, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
- }
+ store64(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) - sizeof(CallerFrameAndPC)));
- emitGetVirtualRegister(callee, X86::ecx);
- // The arguments have been set up on the hot path for op_call_eval
- if (opcodeID == op_call)
- compileOpCallSetupArgs(instruction);
- else if (opcodeID == op_construct)
- compileOpConstructSetupArgs(instruction);
-
- // Check for JSFunctions.
- emitJumpSlowCaseIfNotJSCell(X86::ecx);
- addSlowCase(jnePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr)));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- emitCTICall(Interpreter::cti_op_construct_JSConstruct);
- emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitGetVirtualRegister(callee, X86::ecx);
+ if (opcodeID == op_call_eval) {
+ compileCallEval(instruction);
+ return;
}
- // Speculatively roll the callframe, assuming argCount will match the arity.
- storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
- addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
- move(Imm32(argCount), X86::edx);
+ DataLabelPtr addressOfLinkedFunctionCheck;
+ Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
+ addSlowCase(slowCase);
- emitNakedCall(m_interpreter->m_ctiVirtualCall);
+ 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;
- if (opcodeID == op_call_eval)
- wasEval.link(this);
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scope)), regT2);
+ store64(regT2, Address(MacroAssembler::stackPointerRegister, JSStack::ScopeChain * sizeof(Register) - sizeof(CallerFrameAndPC)));
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
+ m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
- sampleCodeBlock(m_codeBlock);
-}
-
-void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned, OpcodeID opcodeID)
-{
- int dst = instruction[1].u.operand;
-
- linkSlowCase(iter);
- linkSlowCase(iter);
-
- // This handles host functions
- emitCTICall(((opcodeID == op_construct) ? Interpreter::cti_op_construct_NotJSConstruct : Interpreter::cti_op_call_NotJSFunction));
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
+
+ emitPutCallResult(instruction);
}
-#else
-
-static NO_RETURN void unreachable()
-{
- ASSERT_NOT_REACHED();
- exit(1);
-}
-
-void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
+void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- // Handle eval
- Jump wasEval;
if (opcodeID == op_call_eval) {
- emitGetVirtualRegister(callee, X86::ecx);
- compileOpCallEvalSetupArgs(instruction);
-
- emitCTICall(Interpreter::cti_op_call_eval);
- wasEval = jnePtr(X86::eax, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
+ compileCallEvalSlowCase(instruction, iter);
+ return;
}
- // This plants a check for a cached JSFunction value, so we can plant a fast link to the callee.
- // This deliberately leaves the callee in ecx, used when setting up the stack frame below
- emitGetVirtualRegister(callee, X86::ecx);
- DataLabelPtr addressOfLinkedFunctionCheck;
- Jump jumpToSlow = jnePtrWithPatch(X86::ecx, addressOfLinkedFunctionCheck, ImmPtr(JSValuePtr::encode(jsImpossibleValue())));
- addSlowCase(jumpToSlow);
- ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
- m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
-
- // The following is the fast case, only used whan a callee can be linked.
-
- // In the case of OpConstruct, call out to a cti_ function to create the new object.
- if (opcodeID == op_construct) {
- int proto = instruction[5].u.operand;
- int thisRegister = instruction[6].u.operand;
-
- emitPutJITStubArg(X86::ecx, 1);
- emitPutJITStubArgFromVirtualRegister(proto, 4, X86::eax);
- emitCTICall(Interpreter::cti_op_construct_JSConstruct);
- emitPutVirtualRegister(thisRegister);
- emitGetVirtualRegister(callee, X86::ecx);
- }
+ linkSlowCase(iter);
- // 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
- storePtr(ImmPtr(JSValuePtr::encode(noValue())), Address(callFrameRegister, (registerOffset + RegisterFile::OptionalCalleeArguments) * static_cast<int>(sizeof(Register))));
- storePtr(X86::ecx, Address(callFrameRegister, (registerOffset + RegisterFile::Callee) * static_cast<int>(sizeof(Register))));
- loadPtr(Address(X86::ecx, FIELD_OFFSET(JSFunction, m_scopeChain) + FIELD_OFFSET(ScopeChain, m_node)), X86::edx); // newScopeChain
- store32(Imm32(argCount), Address(callFrameRegister, (registerOffset + RegisterFile::ArgumentCount) * static_cast<int>(sizeof(Register))));
- storePtr(callFrameRegister, Address(callFrameRegister, (registerOffset + RegisterFile::CallerFrame) * static_cast<int>(sizeof(Register))));
- storePtr(X86::edx, Address(callFrameRegister, (registerOffset + RegisterFile::ScopeChain) * static_cast<int>(sizeof(Register))));
- addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
-
- // Call to the callee
- m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall(reinterpret_cast<void*>(unreachable));
+ ThunkGenerator generator = linkThunkGeneratorFor(
+ (opcodeID == op_construct || opcodeID == op_construct_varargs) ? CodeForConstruct : CodeForCall,
+ RegisterPreservationNotRequired);
- if (opcodeID == op_call_eval)
- wasEval.link(this);
+ move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
+ m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_vm->getCTIStub(generator).code());
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
+ 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::privateCompileClosureCall(CallLinkInfo* callLinkInfo, CodeBlock* calleeCodeBlock, Structure* expectedStructure, ExecutableBase* expectedExecutable, MacroAssemblerCodePtr codePtr)
{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- linkSlowCase(iter);
-
- // The arguments have been set up on the hot path for op_call_eval
- if (opcodeID == op_call)
- compileOpCallSetupArgs(instruction);
- else if (opcodeID == op_construct)
- compileOpConstructSetupArgs(instruction);
-
- // Fast check for JS function.
- Jump callLinkFailNotObject = emitJumpIfNotJSCell(X86::ecx);
- Jump callLinkFailNotJSFunction = jnePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- emitCTICall(Interpreter::cti_op_construct_JSConstruct);
- emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitGetVirtualRegister(callee, X86::ecx);
- }
-
- move(Imm32(argCount), X86::edx);
-
- // Speculatively roll the callframe, assuming argCount will match the arity.
- storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
- addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
-
- m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation =
- emitNakedCall(m_interpreter->m_ctiVirtualCallPreLink);
-
- Jump storeResultForFirstRun = jump();
+ JumpList slowCases;
-// FIXME: this label can be removed, since it is a fixed offset from 'callReturnLocation'.
- // This is the address for the cold path *after* the first run (which tries to link the call).
- m_callStructureStubCompilationInfo[callLinkInfoIndex].coldPathOther = MacroAssembler::Label(this);
-
- // The arguments have been set up on the hot path for op_call_eval
- if (opcodeID == op_call)
- compileOpCallSetupArgs(instruction);
- else if (opcodeID == op_construct)
- compileOpConstructSetupArgs(instruction);
-
- // Check for JSFunctions.
- Jump isNotObject = emitJumpIfNotJSCell(X86::ecx);
- Jump isJSFunction = jePtr(Address(X86::ecx), ImmPtr(m_interpreter->m_jsFunctionVptr));
-
- // This handles host functions
- isNotObject.link(this);
- callLinkFailNotObject.link(this);
- callLinkFailNotJSFunction.link(this);
- emitCTICall(((opcodeID == op_construct) ? Interpreter::cti_op_construct_NotJSConstruct : Interpreter::cti_op_call_NotJSFunction));
- Jump wasNotJSFunction = jump();
+ slowCases.append(branchTestPtr(NonZero, regT0, tagMaskRegister));
+ slowCases.append(branchStructure(NotEqual, Address(regT0, JSCell::structureIDOffset()), expectedStructure));
+ slowCases.append(branchPtr(NotEqual, Address(regT0, JSFunction::offsetOfExecutable()), TrustedImmPtr(expectedExecutable)));
+
+ loadPtr(Address(regT0, JSFunction::offsetOfScopeChain()), regT1);
+ emitPutToCallFrameHeader(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());
- // Next, handle JSFunctions...
- isJSFunction.link(this);
+ callLinkInfo->stub = stubRoutine.release();
+}
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- emitCTICall(Interpreter::cti_op_construct_JSConstruct);
- emitPutVirtualRegister(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitGetVirtualRegister(callee, X86::ecx);
- }
+void JIT::emit_op_call(Instruction* currentInstruction)
+{
+ compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
+}
- // Speculatively roll the callframe, assuming argCount will match the arity.
- storePtr(callFrameRegister, Address(callFrameRegister, (RegisterFile::CallerFrame + registerOffset) * static_cast<int>(sizeof(Register))));
- addPtr(Imm32(registerOffset * static_cast<int>(sizeof(Register))), callFrameRegister);
- move(Imm32(argCount), X86::edx);
+void JIT::emit_op_call_eval(Instruction* currentInstruction)
+{
+ compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
+}
- emitNakedCall(m_interpreter->m_ctiVirtualCall);
+void JIT::emit_op_call_varargs(Instruction* currentInstruction)
+{
+ compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
+}
+
+void JIT::emit_op_construct_varargs(Instruction* currentInstruction)
+{
+ compileOpCall(op_construct_varargs, currentInstruction, m_callLinkInfoIndex++);
+}
- // Put the return value in dst. In the interpreter, op_ret does this.
- wasNotJSFunction.link(this);
- storeResultForFirstRun.link(this);
- emitPutVirtualRegister(dst);
+void JIT::emit_op_construct(Instruction* currentInstruction)
+{
+ compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
+}
- sampleCodeBlock(m_codeBlock);
+void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+ compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
}
-#endif
+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_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(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
+}
} // namespace JSC
+#endif // USE(JSVALUE64)
#endif // ENABLE(JIT)
projects / apple / javascriptcore.git / blobdiff