/*
- * Copyright (C) 2008, 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2013-2015 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(JSVALUE64)
#include "JIT.h"
-#include "Arguments.h"
#include "CodeBlock.h"
#include "JITInlines.h"
-#include "JITStubCall.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "Interpreter.h"
-#include "Operations.h"
-#include "RepatchBuffer.h"
+#include "JSCInlines.h"
+#include "LinkBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
+#include "SetupVarargsFrame.h"
+#include "StackAlignment.h"
#include "ThunkGenerators.h"
#include <wtf/StringPrintStream.h>
-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;
namespace JSC {
void JIT::emitPutCallResult(Instruction* instruction)
{
int dst = instruction[1].u.operand;
- emitValueProfilingSite(regT4);
+ emitValueProfilingSite();
emitPutVirtualRegister(dst);
- if (canBeOptimizedOrInlined()) {
- // Make lastResultRegister tracking simpler in the DFG. This is needed because
- // the DFG may have the SetLocal corresponding to this Call's return value in
- // a different basic block, if inlining happened. The DFG isn't smart enough to
- // track the baseline JIT's last result register across basic blocks.
- killLastResultRegister();
- }
}
-void JIT::compileLoadVarargs(Instruction* instruction)
+void JIT::compileSetupVarargsFrame(Instruction* instruction, CallLinkInfo* info)
{
int thisValue = instruction[3].u.operand;
int arguments = instruction[4].u.operand;
int firstFreeRegister = instruction[5].u.operand;
+ int firstVarArgOffset = instruction[6].u.operand;
+
+ emitGetVirtualRegister(arguments, regT1);
+ callOperation(operationSizeFrameForVarargs, regT1, -firstFreeRegister, firstVarArgOffset);
+ move(TrustedImm32(-firstFreeRegister), regT1);
+ emitSetVarargsFrame(*this, returnValueGPR, false, regT1, regT1);
+ addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 5 * sizeof(void*)))), regT1, stackPointerRegister);
+ emitGetVirtualRegister(arguments, regT2);
+ callOperation(operationSetupVarargsFrame, regT1, regT2, firstVarArgOffset, regT0);
+ move(returnValueGPR, regT1);
+
+ // Profile the argument count.
+ load32(Address(regT1, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
+ load8(info->addressOfMaxNumArguments(), regT0);
+ Jump notBiggest = branch32(Above, regT0, regT2);
+ Jump notSaturated = branch32(BelowOrEqual, regT2, TrustedImm32(255));
+ move(TrustedImm32(255), regT2);
+ notSaturated.link(this);
+ store8(regT2, info->addressOfMaxNumArguments());
+ notBiggest.link(this);
+
+ // Initialize 'this'.
+ emitGetVirtualRegister(thisValue, regT0);
+ store64(regT0, Address(regT1, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))));
- killLastResultRegister();
-
- JumpList slowCase;
- JumpList end;
- bool canOptimize = m_codeBlock->usesArguments()
- && arguments == m_codeBlock->argumentsRegister()
- && !m_codeBlock->symbolTable()->slowArguments();
-
- if (canOptimize) {
- emitGetVirtualRegister(arguments, regT0);
- slowCase.append(branch64(NotEqual, regT0, TrustedImm64(JSValue::encode(JSValue()))));
-
- emitGetFromCallFrameHeader32(JSStack::ArgumentCount, regT0);
- slowCase.append(branch32(Above, regT0, TrustedImm32(Arguments::MaxArguments + 1)));
- // regT0: argumentCountIncludingThis
-
- move(regT0, regT1);
- neg64(regT1);
- add64(TrustedImm32(firstFreeRegister - JSStack::CallFrameHeaderSize), regT1);
- lshift64(TrustedImm32(3), regT1);
- addPtr(callFrameRegister, regT1);
- // regT1: newCallFrame
-
- slowCase.append(branchPtr(Above, AbsoluteAddress(m_vm->interpreter->stack().addressOfEnd()), 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() * 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());
- }
-
- if (canOptimize)
- slowCase.link(this);
-
- JITStubCall stubCall(this, cti_op_load_varargs);
- stubCall.addArgument(thisValue, regT0);
- stubCall.addArgument(arguments, regT0);
- stubCall.addArgument(Imm32(firstFreeRegister));
- stubCall.call(regT1);
-
- if (canOptimize)
- end.link(this);
+ addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
}
void JIT::compileCallEval(Instruction* instruction)
{
- JITStubCall stubCall(this, cti_op_call_eval); // Initializes ScopeChain; ReturnPC; CodeBlock.
- stubCall.call();
+ addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
+ storePtr(callFrameRegister, Address(regT1, CallFrame::callerFrameOffset()));
+
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
+
+ callOperation(operationCallEval, regT1);
+
addSlowCase(branch64(Equal, regT0, TrustedImm64(JSValue::encode(JSValue()))));
- emitGetFromCallFrameHeaderPtr(JSStack::CallerFrame, callFrameRegister);
sampleCodeBlock(m_codeBlock);
void JIT::compileCallEvalSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
+ CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
+ info->setUpCall(CallLinkInfo::Call, CodeOrigin(m_bytecodeOffset), regT0);
+
linkSlowCase(iter);
+ int registerOffset = -instruction[4].u.operand;
+
+ addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
- emitGetFromCallFrameHeader64(JSStack::Callee, regT0);
- emitNakedCall(m_vm->getCTIStub(oldStyleVirtualCallGenerator).code());
+ load64(Address(stackPointerRegister, sizeof(Register) * JSStack::Callee - sizeof(CallerFrameAndPC)), regT0);
+ move(TrustedImmPtr(info), regT2);
+ MacroAssemblerCodeRef virtualThunk = virtualThunkFor(m_vm, *info);
+ info->setSlowStub(createJITStubRoutine(virtualThunk, *m_vm, nullptr, true));
+ emitNakedCall(virtualThunk.code());
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
- 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 initializes ReturnPC; CodeBlock.
- Caller restores callFrameRegister after return.
*/
-
- if (opcodeID == op_call_varargs)
- compileLoadVarargs(instruction);
+ 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);
+ CallLinkInfo* info;
+ if (opcodeID != op_call_eval)
+ info = m_codeBlock->addCallLinkInfo();
+ if (opcodeID == op_call_varargs || opcodeID == op_construct_varargs)
+ compileSetupVarargsFrame(instruction, info);
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);
- loadPtr(Address(regT0, JSCell::structureOffset()), regT0);
- storePtr(regT0, instruction[6].u.arrayProfile->addressOfLastSeenStructure());
+ 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)), callFrameRegister, regT1);
- store32(TrustedImm32(argCount), Address(regT1, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
- } // regT1 holds newCallFrame with ArgumentCount initialized.
+ 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)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
+ uint32_t locationBits = CallSiteIndex(bytecodeOffset).bits();
+ store32(TrustedImm32(locationBits), Address(callFrameRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + TagOffset));
emitGetVirtualRegister(callee, regT0); // regT0 holds callee.
- store64(callFrameRegister, Address(regT1, JSStack::CallerFrame * static_cast<int>(sizeof(Register))));
- store64(regT0, Address(regT1, JSStack::Callee * static_cast<int>(sizeof(Register))));
- move(regT1, callFrameRegister);
-
+ store64(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) - sizeof(CallerFrameAndPC)));
+
if (opcodeID == op_call_eval) {
compileCallEval(instruction);
return;
}
DataLabelPtr addressOfLinkedFunctionCheck;
- BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
- END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
addSlowCase(slowCase);
- 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;
+ ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
+ info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), CodeOrigin(m_bytecodeOffset), regT0);
+ m_callCompilationInfo.append(CallCompilationInfo());
+ m_callCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
+ m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scope)), regT1);
- emitPutToCallFrameHeader(regT1, JSStack::ScopeChain);
- m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+ m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
+
+ addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
+ checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
}
linkSlowCase(iter);
-
- m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_vm->getCTIStub(oldStyleLinkConstructGenerator).code() : m_vm->getCTIStub(oldStyleLinkCallGenerator).code());
+
+ move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
+ m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_vm->getCTIStub(linkCallThunkGenerator).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(branchTestPtr(NonZero, regT0, tagMaskRegister));
- slowCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(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(oldStyleVirtualCallGenerator).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(oldStyleVirtualCallGenerator).code());
-
- callLinkInfo->stub = stubRoutine.release();
-}
-
void JIT::emit_op_call(Instruction* currentInstruction)
{
compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
{
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)
{
{
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++);
git://git.webkit.org / WebKit-https.git / blobdiff