void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
{
int argCount = instruction[2].u.operand;
int registerOffset = instruction[3].u.operand;
linkSlowCase(iter);
// Fast check for JS function.
Jump callLinkFailNotObject = emitJumpIfNotJSCell(regT0);
Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsFunctionVPtr));
// 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), regT1);
m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
// 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));
// This handles host functions
callLinkFailNotObject.link(this);
callLinkFailNotJSFunction.link(this);
JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
stubCall.addArgument(regT0);
stubCall.addArgument(JIT::Imm32(registerOffset));
stubCall.addArgument(JIT::Imm32(argCount));
stubCall.call();
sampleCodeBlock(m_codeBlock);
}
void JIT::emit_op_jlesseq(Instruction* currentInstruction, bool invert)
{
unsigned op1 = currentInstruction[1].u.operand;
unsigned op2 = currentInstruction[2].u.operand;
unsigned target = currentInstruction[3].u.operand;
// We generate inline code for the following cases in the fast path:
// - int immediate to constant int immediate
// - constant int immediate to int immediate
// - int immediate to int immediate
if (isOperandConstantImmediateChar(op1)) {
emitGetVirtualRegister(op2, regT0);
addSlowCase(emitJumpIfNotJSCell(regT0));
JumpList failures;
emitLoadCharacterString(regT0, regT0, failures);
addSlowCase(failures);
addJump(branch32(invert ? LessThan : GreaterThanOrEqual, regT0, Imm32(asString(getConstantOperand(op1))->tryGetValue()[0])), target);
return;
}
if (isOperandConstantImmediateChar(op2)) {
emitGetVirtualRegister(op1, regT0);
addSlowCase(emitJumpIfNotJSCell(regT0));
JumpList failures;
emitLoadCharacterString(regT0, regT0, failures);
addSlowCase(failures);
addJump(branch32(invert ? GreaterThan : LessThanOrEqual, regT0, Imm32(asString(getConstantOperand(op2))->tryGetValue()[0])), target);
return;
}
if (isOperandConstantImmediateInt(op2)) {
emitGetVirtualRegister(op1, regT0);
emitJumpSlowCaseIfNotImmediateInteger(regT0);
int32_t op2imm = getConstantOperandImmediateInt(op2);
addJump(branch32(invert ? GreaterThan : LessThanOrEqual, regT0, Imm32(op2imm)), target);
} else if (isOperandConstantImmediateInt(op1)) {
emitGetVirtualRegister(op2, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
int32_t op1imm = getConstantOperandImmediateInt(op1);
addJump(branch32(invert ? LessThan : GreaterThanOrEqual, regT1, Imm32(op1imm)), target);
} else {
emitGetVirtualRegisters(op1, regT0, op2, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT0);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
addJump(branch32(invert ? GreaterThan : LessThanOrEqual, regT0, regT1), target);
}
}
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()) {
emitGetVirtualRegister(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0);
Jump done = emitJumpIfNotJSCell(regT0);
loadPtr(Address(regT0, JSCell::structureOffset()), regT0);
storePtr(regT0, instruction[5].u.arrayProfile->addressOfLastSeenStructure());
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.
store32(TrustedImm32(instruction - m_codeBlock->instructions().begin()), Address(callFrameRegister, JSStack::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
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);
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);
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);
emitPutToCallFrameHeader(regT1, JSStack::ScopeChain);
m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
sampleCodeBlock(m_codeBlock);
}
void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
{
CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
int callee = instruction[2].u.operand;
/* Caller always:
- Updates callFrameRegister to callee callFrame.
- Initializes ArgumentCount; CallerFrame; Callee.
For a JS call:
- Callee initializes ReturnPC; CodeBlock.
- Callee restores callFrameRegister before return.
For a non-JS call:
- Caller initializes 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)
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);
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.
store64(regT0, Address(stackPointerRegister, JSStack::Callee * static_cast<int>(sizeof(Register)) - sizeof(CallerFrameAndPC)));
if (opcodeID == op_call_eval) {
compileCallEval(instruction);
return;
}
DataLabelPtr addressOfLinkedFunctionCheck;
Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
addSlowCase(slowCase);
ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
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;
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
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)
{
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();
// 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();
// Next, handle JSFunctions...
isJSFunction.link(this);
// 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);
}
// 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);
emitNakedCall(m_interpreter->m_ctiVirtualCall);
// Put the return value in dst. In the interpreter, op_ret does this.
wasNotJSFunction.link(this);
storeResultForFirstRun.link(this);
emitPutVirtualRegister(dst);
#if ENABLE(CODEBLOCK_SAMPLING)
storePtr(ImmPtr(m_codeBlock), m_interpreter->sampler()->codeBlockSlot());
#endif
}
void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
{
int callee = instruction[2].u.operand;
/* Caller always:
- Updates callFrameRegister to callee callFrame.
- Initializes ArgumentCount; CallerFrame; Callee.
For a JS call:
- Callee initializes ReturnPC; CodeBlock.
- Callee restores callFrameRegister before return.
For a non-JS call:
- Caller initializes 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);
COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_tail_call), call_and_tail_call_opcodes_must_be_same_length);
COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_tail_call_varargs), call_and_tail_call_varargs_opcodes_must_be_same_length);
COMPILE_ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_tail_call_forward_arguments), call_and_tail_call_forward_arguments_opcodes_must_be_same_length);
CallLinkInfo* info = nullptr;
if (opcodeID != op_call_eval)
info = m_codeBlock->addCallLinkInfo();
if (opcodeID == op_call_varargs || opcodeID == op_construct_varargs || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments)
compileSetupVarargsFrame(opcodeID, 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);
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, CallFrameSlot::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 = CallSiteIndex(bytecodeOffset).bits();
store32(TrustedImm32(locationBits), Address(callFrameRegister, CallFrameSlot::argumentCount * static_cast<int>(sizeof(Register)) + TagOffset));
emitGetVirtualRegister(callee, regT0); // regT0 holds callee.
store64(regT0, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) - sizeof(CallerFrameAndPC)));
if (opcodeID == op_call_eval) {
compileCallEval(instruction);
return;
}
DataLabelPtr addressOfLinkedFunctionCheck;
Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(0));
addSlowCase(slowCase);
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;
if (opcodeID == op_tail_call) {
CallFrameShuffleData shuffleData;
shuffleData.tagTypeNumber = GPRInfo::tagTypeNumberRegister;
shuffleData.numLocals =
instruction[4].u.operand - sizeof(CallerFrameAndPC) / sizeof(Register);
shuffleData.args.resize(instruction[3].u.operand);
for (int i = 0; i < instruction[3].u.operand; ++i) {
shuffleData.args[i] =
ValueRecovery::displacedInJSStack(
virtualRegisterForArgument(i) - instruction[4].u.operand,
DataFormatJS);
}
shuffleData.callee =
ValueRecovery::inGPR(regT0, DataFormatJS);
shuffleData.setupCalleeSaveRegisters(m_codeBlock);
info->setFrameShuffleData(shuffleData);
CallFrameShuffler(*this, shuffleData).prepareForTailCall();
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedTailCall();
return;
}
if (opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments) {
emitRestoreCalleeSaves();
prepareForTailCallSlow();
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedTailCall();
return;
}
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
emitPutCallResult(instruction);
}