*/
#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 "JITStubCall.h"
namespace JSC {
-#if USE(JSVALUE32_64)
-
-void JIT::compileOpCallInitializeCallFrame()
-{
- // regT0 holds callee, regT1 holds argCount
- store32(regT1, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_data) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT1); // scopeChain
-
- emitStore(static_cast<unsigned>(RegisterFile::OptionalCalleeArguments), JSValue());
- storePtr(regT0, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register)))); // callee
- storePtr(regT1, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register)))); // scopeChain
-}
-
-void JIT::compileOpCallSetupArgs(Instruction* instruction)
-{
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- emitPutJITStubArg(regT0, 1);
- emitPutJITStubArg(regT1, 2);
- emitPutJITStubArgConstant(registerOffset, 3);
- emitPutJITStubArgConstant(argCount, 5);
-}
-
-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;
-
- emitPutJITStubArg(regT0, 1);
- emitPutJITStubArg(regT1, 2);
- emitPutJITStubArgConstant(registerOffset, 3);
- emitPutJITStubArgConstant(argCount, 5);
- emitPutJITStubArgFromVirtualRegister(proto, 7, regT2, regT3);
- emitPutJITStubArgConstant(thisRegister, 9);
-}
-
-void JIT::compileOpCallVarargsSetupArgs(Instruction*)
-{
- emitPutJITStubArg(regT0, 1);
- emitPutJITStubArg(regT1, 2);
- emitPutJITStubArg(regT3, 3); // registerOffset
- emitPutJITStubArg(regT2, 5); // argCount
-}
-
-void JIT::compileOpCallVarargs(Instruction* instruction)
+void JIT::emit_op_call_put_result(Instruction* instruction)
{
int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCountRegister = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- emitLoad(callee, regT1, regT0);
- emitLoadPayload(argCountRegister, regT2); // argCount
- addPtr(Imm32(registerOffset), regT2, regT3); // registerOffset
-
- compileOpCallVarargsSetupArgs(instruction);
-
- emitJumpSlowCaseIfNotJSCell(callee, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr)));
-
- // Speculatively roll the callframe, assuming argCount will match the arity.
- mul32(Imm32(sizeof(Register)), regT3, regT3);
- addPtr(callFrameRegister, regT3);
- storePtr(callFrameRegister, Address(regT3, RegisterFile::CallerFrame * static_cast<int>(sizeof(Register))));
- move(regT3, callFrameRegister);
-
- move(regT2, regT1); // argCount
-
- emitNakedCall(m_globalData->jitStubs.ctiVirtualCall());
-
- emitStore(dst, regT1, regT0);
-
- sampleCodeBlock(m_codeBlock);
-}
-
-void JIT::compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
-
- linkSlowCaseIfNotJSCell(iter, callee);
- linkSlowCase(iter);
-
- JITStubCall stubCall(this, cti_op_call_NotJSFunction);
- stubCall.call(dst); // In the interpreter, the callee puts the return value in dst.
-
- map(m_bytecodeIndex + OPCODE_LENGTH(op_call_varargs), dst, regT1, regT0);
- sampleCodeBlock(m_codeBlock);
+ emitValueProfilingSite();
+ emitPutVirtualRegister(dst);
+ if (canBeOptimized())
+ killLastResultRegister(); // Make lastResultRegister tracking simpler in the DFG.
}
-void JIT::emit_op_ret(Instruction* currentInstruction)
+void JIT::compileLoadVarargs(Instruction* instruction)
{
- unsigned dst = currentInstruction[1].u.operand;
+ int thisValue = instruction[2].u.operand;
+ int arguments = instruction[3].u.operand;
+ int firstFreeRegister = instruction[4].u.operand;
- // We could JIT generate the deref, only calling out to C when the refcount hits zero.
- if (m_codeBlock->needsFullScopeChain())
- JITStubCall(this, cti_op_ret_scopeChain).call();
+ killLastResultRegister();
- emitLoad(dst, regT1, regT0);
- emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, regT2);
- emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
-
- restoreReturnAddressBeforeReturn(regT2);
- ret();
-}
-
-void JIT::emit_op_construct_verify(Instruction* currentInstruction)
-{
- unsigned dst = currentInstruction[1].u.operand;
-
- emitLoad(dst, regT1, regT0);
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
- addSlowCase(branch32(NotEqual, Address(regT2, OBJECT_OFFSETOF(Structure, m_typeInfo) + OBJECT_OFFSETOF(TypeInfo, m_type)), Imm32(ObjectType)));
-}
+ JumpList slowCase;
+ JumpList end;
+ if (m_codeBlock->usesArguments() && arguments == m_codeBlock->argumentsRegister()) {
+ emitGetVirtualRegister(arguments, regT0);
+ slowCase.append(branchPtr(NotEqual, regT0, TrustedImmPtr(JSValue::encode(JSValue()))));
-void JIT::emitSlow_op_construct_verify(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- unsigned dst = currentInstruction[1].u.operand;
- unsigned src = currentInstruction[2].u.operand;
+ emitGetFromCallFrameHeader32(RegisterFile::ArgumentCount, regT0);
+ slowCase.append(branch32(Above, regT0, TrustedImm32(Arguments::MaxArguments + 1)));
+ // regT0: argumentCountIncludingThis
- linkSlowCase(iter);
- linkSlowCase(iter);
- emitLoad(src, regT1, regT0);
- emitStore(dst, regT1, regT0);
-}
+ move(regT0, regT1);
+ add32(TrustedImm32(firstFreeRegister + RegisterFile::CallFrameHeaderSize), regT1);
+ lshift32(TrustedImm32(3), regT1);
+ addPtr(callFrameRegister, regT1);
+ // regT1: newCallFrame
-void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call);
-}
+ slowCase.append(branchPtr(Below, AbsoluteAddress(m_globalData->interpreter->registerFile().addressOfEnd()), regT1));
-void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_call_eval);
-}
+ // Initialize ArgumentCount.
+ store32(regT0, Address(regT1, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
-void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- compileOpCallVarargsSlowCase(currentInstruction, iter);
-}
+ // Initialize 'this'.
+ emitGetVirtualRegister(thisValue, regT2);
+ storePtr(regT2, Address(regT1, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))));
-void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- compileOpCallSlowCase(currentInstruction, iter, m_callLinkInfoIndex++, op_construct);
-}
+ // Copy arguments.
+ neg32(regT0);
+ signExtend32ToPtr(regT0, regT0);
+ end.append(branchAddPtr(Zero, TrustedImm32(1), regT0));
+ // regT0: -argumentCount
-void JIT::emit_op_call(Instruction* currentInstruction)
-{
- compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
-}
+ Label copyLoop = label();
+ loadPtr(BaseIndex(callFrameRegister, regT0, TimesEight, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))), regT2);
+ storePtr(regT2, BaseIndex(regT1, regT0, TimesEight, CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register))));
+ branchAddPtr(NonZero, TrustedImm32(1), regT0).linkTo(copyLoop, this);
-void JIT::emit_op_call_eval(Instruction* currentInstruction)
-{
- compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex++);
-}
+ end.append(jump());
+ }
-void JIT::emit_op_load_varargs(Instruction* currentInstruction)
-{
- int argCountDst = currentInstruction[1].u.operand;
- int argsOffset = currentInstruction[2].u.operand;
+ if (m_codeBlock->usesArguments() && arguments == m_codeBlock->argumentsRegister())
+ slowCase.link(this);
JITStubCall stubCall(this, cti_op_load_varargs);
- stubCall.addArgument(Imm32(argsOffset));
- stubCall.call();
- // Stores a naked int32 in the register file.
- store32(returnValueRegister, Address(callFrameRegister, argCountDst * sizeof(Register)));
-}
-
-void JIT::emit_op_call_varargs(Instruction* currentInstruction)
-{
- compileOpCallVarargs(currentInstruction);
-}
+ stubCall.addArgument(thisValue, regT0);
+ stubCall.addArgument(arguments, regT0);
+ stubCall.addArgument(Imm32(firstFreeRegister));
+ stubCall.call(regT1);
-void JIT::emit_op_construct(Instruction* currentInstruction)
-{
- compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
+ if (m_codeBlock->usesArguments() && arguments == m_codeBlock->argumentsRegister())
+ end.link(this);
}
-#if !ENABLE(JIT_OPTIMIZE_CALL)
-
-/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
-void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
+void JIT::compileCallEval()
{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- Jump wasEval1;
- Jump wasEval2;
- 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();
- wasEval1 = branchTest32(NonZero, regT0);
- wasEval2 = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
- }
-
- emitLoad(callee, regT1, regT2);
-
- if (opcodeID == op_call)
- compileOpCallSetupArgs(instruction);
- else if (opcodeID == op_construct)
- compileOpConstructSetupArgs(instruction);
-
- emitJumpSlowCaseIfNotJSCell(callee, regT1);
- addSlowCase(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsFunctionVPtr)));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- JITStubCall(this, cti_op_construct_JSConstruct).call(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitLoad(callee, regT1, regT2);
- }
-
- // 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);
-
- emitNakedCall(m_globalData->jitStubs.ctiVirtualCall());
-
- if (opcodeID == op_call_eval) {
- wasEval1.link(this);
- wasEval2.link(this);
- }
-
- emitStore(dst, regT1, regT0);;
+ JITStubCall stubCall(this, cti_op_call_eval); // Initializes ScopeChain; ReturnPC; CodeBlock.
+ stubCall.call();
+ addSlowCase(branchPtr(Equal, regT0, TrustedImmPtr(JSValue::encode(JSValue()))));
+ emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, callFrameRegister);
sampleCodeBlock(m_codeBlock);
}
-void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned, OpcodeID opcodeID)
+void JIT::compileCallEvalSlowCase(Vector<SlowCaseEntry>::iterator& iter)
{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
-
- linkSlowCaseIfNotJSCell(iter, callee);
linkSlowCase(iter);
- JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
- stubCall.call(dst); // In the interpreter, the callee puts the return value in dst.
+ emitGetFromCallFrameHeaderPtr(RegisterFile::Callee, regT0);
+ emitNakedCall(m_globalData->jitStubs->ctiVirtualCall());
sampleCodeBlock(m_codeBlock);
}
-#else // !ENABLE(JIT_OPTIMIZE_CALL)
-
-/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
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;
-
- Jump wasEval1;
- Jump wasEval2;
- 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();
- wasEval1 = branchTest32(NonZero, regT0);
- wasEval2 = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
- }
-
- emitLoad(callee, regT1, regT0);
-
- DataLabelPtr addressOfLinkedFunctionCheck;
- Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, ImmPtr(0));
- addSlowCase(jumpToSlow);
- ASSERT(differenceBetween(addressOfLinkedFunctionCheck, jumpToSlow) == patchOffsetOpCallCompareToJump);
- m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
-
- addSlowCase(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
-
- // 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;
-
- JITStubCall stubCall(this, cti_op_construct_JSConstruct);
- stubCall.addArgument(regT1, regT0);
- stubCall.addArgument(Imm32(0)); // FIXME: Remove this unused JITStub argument.
- stubCall.addArgument(Imm32(0)); // FIXME: Remove this unused JITStub argument.
- stubCall.addArgument(proto);
- stubCall.call(thisRegister);
-
- emitLoad(callee, regT1, regT0);
- }
-
- // 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
- emitStore(registerOffset + RegisterFile::OptionalCalleeArguments, JSValue());
- emitStore(registerOffset + RegisterFile::Callee, regT1, regT0);
-
- loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_data) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT1); // 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(regT1, 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();
-
- if (opcodeID == op_call_eval) {
- wasEval1.link(this);
- wasEval2.link(this);
- }
-
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitStore(dst, regT1, regT0);
- map(m_bytecodeIndex + opcodeLengths[opcodeID], dst, regT1, regT0);
-
- sampleCodeBlock(m_codeBlock);
-}
-
-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);
- linkSlowCase(iter);
+ int callee = instruction[1].u.operand;
- // 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 = branch32(NotEqual, regT1, Imm32(JSValue::CellTag));
- Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsFunctionVPtr));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- JITStubCall(this, cti_op_construct_JSConstruct).call(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitLoad(callee, regT1, regT0);
- }
-
- // 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(m_globalData->jitStubs.ctiVirtualCallPreLink());
-
- // Put the return value in dst.
- emitStore(dst, regT1, regT0);;
- sampleCodeBlock(m_codeBlock);
+ /* Caller always:
+ - Updates callFrameRegister to callee callFrame.
+ - Initializes ArgumentCount; CallerFrame; Callee.
- // If not, we need an extra case in the if below!
- ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
+ For a JS call:
+ - Caller initializes ScopeChain.
+ - Callee initializes ReturnPC; CodeBlock.
+ - Callee restores callFrameRegister before return.
- // Done! - return back to the hot path.
- if (opcodeID == op_construct)
- emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_construct));
- else
- emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
+ For a non-JS call:
+ - Caller initializes ScopeChain; ReturnPC; CodeBlock.
+ - Caller restores callFrameRegister after return.
+ */
- // This handles host functions
- callLinkFailNotObject.link(this);
- callLinkFailNotJSFunction.link(this);
- JITStubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction).call();
+ if (opcodeID == op_call_varargs)
+ compileLoadVarargs(instruction);
+ else {
+ int argCount = instruction[2].u.operand;
+ int registerOffset = instruction[3].u.operand;
- emitStore(dst, regT1, regT0);;
- sampleCodeBlock(m_codeBlock);
-}
-
-/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
-#endif // !ENABLE(JIT_OPTIMIZE_CALL)
-
-#else // USE(JSVALUE32_64)
-
-void JIT::compileOpCallInitializeCallFrame()
-{
- store32(regT1, Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register))));
-
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSFunction, m_data) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT1); // newScopeChain
-
- storePtr(ImmPtr(JSValue::encode(JSValue())), Address(callFrameRegister, RegisterFile::OptionalCalleeArguments * static_cast<int>(sizeof(Register))));
- storePtr(regT2, Address(callFrameRegister, RegisterFile::Callee * static_cast<int>(sizeof(Register))));
- storePtr(regT1, Address(callFrameRegister, RegisterFile::ScopeChain * static_cast<int>(sizeof(Register))));
-}
-
-void JIT::compileOpCallSetupArgs(Instruction* instruction)
-{
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
-
- // ecx holds func
- emitPutJITStubArg(regT2, 1);
- emitPutJITStubArgConstant(argCount, 3);
- emitPutJITStubArgConstant(registerOffset, 2);
-}
-
-void JIT::compileOpCallVarargsSetupArgs(Instruction* instruction)
-{
- int registerOffset = instruction[4].u.operand;
-
- // ecx holds func
- emitPutJITStubArg(regT2, 1);
- emitPutJITStubArg(regT1, 3);
- addPtr(Imm32(registerOffset), regT1, regT0);
- emitPutJITStubArg(regT0, 2);
-}
-
-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(regT2, 1);
- emitPutJITStubArgConstant(registerOffset, 2);
- emitPutJITStubArgConstant(argCount, 3);
- emitPutJITStubArgFromVirtualRegister(proto, 4, regT0);
- emitPutJITStubArgConstant(thisRegister, 5);
-}
-
-void JIT::compileOpCallVarargs(Instruction* instruction)
-{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCountRegister = instruction[3].u.operand;
-
- emitGetVirtualRegister(argCountRegister, regT1);
- emitGetVirtualRegister(callee, regT2);
- compileOpCallVarargsSetupArgs(instruction);
-
- // Check for JSFunctions.
- emitJumpSlowCaseIfNotJSCell(regT2);
- addSlowCase(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsFunctionVPtr)));
-
- // Speculatively roll the callframe, assuming argCount will match the arity.
- mul32(Imm32(sizeof(Register)), regT0, regT0);
- intptr_t offset = (intptr_t)sizeof(Register) * (intptr_t)RegisterFile::CallerFrame;
- addPtr(Imm32((int32_t)offset), regT0, regT3);
- addPtr(callFrameRegister, regT3);
- storePtr(callFrameRegister, regT3);
- addPtr(regT0, callFrameRegister);
- emitNakedCall(m_globalData->jitStubs.ctiVirtualCall());
-
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
-
- sampleCodeBlock(m_codeBlock);
-}
-
-void JIT::compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
-{
- int dst = instruction[1].u.operand;
-
- linkSlowCase(iter);
- linkSlowCase(iter);
- JITStubCall stubCall(this, cti_op_call_NotJSFunction);
- stubCall.call(dst); // In the interpreter, the callee puts the return value in dst.
-
- sampleCodeBlock(m_codeBlock);
-}
+ addPtr(TrustedImm32(registerOffset * sizeof(Register)), callFrameRegister, regT1);
+ store32(TrustedImm32(argCount), Address(regT1, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
+ } // regT1 holds newCallFrame with ArgumentCount initialized.
-#if !ENABLE(JIT_OPTIMIZE_CALL)
+ store32(TrustedImm32(instruction - m_codeBlock->instructions().begin()), Address(callFrameRegister, RegisterFile::ArgumentCount * static_cast<int>(sizeof(Register)) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
+ emitGetVirtualRegister(callee, regT0); // regT0 holds callee.
-/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
-void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned)
-{
- int dst = instruction[1].u.operand;
- int callee = instruction[2].u.operand;
- int argCount = instruction[3].u.operand;
- int registerOffset = instruction[4].u.operand;
+ storePtr(callFrameRegister, Address(regT1, RegisterFile::CallerFrame * static_cast<int>(sizeof(Register))));
+ storePtr(regT0, Address(regT1, RegisterFile::Callee * static_cast<int>(sizeof(Register))));
+ move(regT1, callFrameRegister);
- // Handle eval
- Jump wasEval;
if (opcodeID == op_call_eval) {
- JITStubCall stubCall(this, cti_op_call_eval);
- stubCall.addArgument(callee, regT2);
- stubCall.addArgument(JIT::Imm32(registerOffset));
- stubCall.addArgument(JIT::Imm32(argCount));
- stubCall.call();
- wasEval = branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue())));
+ compileCallEval();
+ return;
}
- emitGetVirtualRegister(callee, regT2);
- // 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(regT2);
- addSlowCase(branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsFunctionVPtr)));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- JITStubCall(this, cti_op_construct_JSConstruct).call(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitGetVirtualRegister(callee, regT2);
- }
-
- // 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);
-
- emitNakedCall(m_globalData->jitStubs.ctiVirtualCall());
-
- if (opcodeID == op_call_eval)
- wasEval.link(this);
-
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
-
- 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);
- JITStubCall stubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction);
- stubCall.call(dst); // In the interpreter, the callee puts the return value in dst.
-
- sampleCodeBlock(m_codeBlock);
-}
-
-#else // !ENABLE(JIT_OPTIMIZE_CALL)
-
-/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
-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) {
- JITStubCall stubCall(this, cti_op_call_eval);
- stubCall.addArgument(callee, regT2);
- stubCall.addArgument(JIT::Imm32(registerOffset));
- stubCall.addArgument(JIT::Imm32(argCount));
- stubCall.call();
- wasEval = branchPtr(NotEqual, regT0, ImmPtr(JSValue::encode(JSValue())));
- }
-
- // 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, regT2);
DataLabelPtr addressOfLinkedFunctionCheck;
- Jump jumpToSlow = branchPtrWithPatch(NotEqual, regT2, addressOfLinkedFunctionCheck, ImmPtr(JSValue::encode(JSValue())));
- 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.
+ BEGIN_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+ Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(JSValue::encode(JSValue())));
+ END_UNINTERRUPTED_SEQUENCE(sequenceOpCall);
+ addSlowCase(slowCase);
- // 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(regT2, 1);
- emitPutJITStubArgFromVirtualRegister(proto, 4, regT0);
- JITStubCall stubCall(this, cti_op_construct_JSConstruct);
- stubCall.call(thisRegister);
- emitGetVirtualRegister(callee, regT2);
- }
+ 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;
- // 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(JSValue::encode(JSValue())), Address(callFrameRegister, (registerOffset + RegisterFile::OptionalCalleeArguments) * static_cast<int>(sizeof(Register))));
- storePtr(regT2, Address(callFrameRegister, (registerOffset + RegisterFile::Callee) * static_cast<int>(sizeof(Register))));
- loadPtr(Address(regT2, OBJECT_OFFSETOF(JSFunction, m_data) + OBJECT_OFFSETOF(ScopeChain, m_node)), regT1); // 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(regT1, Address(callFrameRegister, (registerOffset + RegisterFile::ScopeChain) * static_cast<int>(sizeof(Register))));
- addPtr(Imm32(registerOffset * sizeof(Register)), callFrameRegister);
-
- // Call to the callee
+ loadPtr(Address(regT0, OBJECT_OFFSETOF(JSFunction, m_scopeChain)), regT1);
+ emitPutToCallFrameHeader(regT1, RegisterFile::ScopeChain);
m_callStructureStubCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
-
- if (opcodeID == op_call_eval)
- wasEval.link(this);
-
- // Put the return value in dst. In the interpreter, op_ret does this.
- emitPutVirtualRegister(dst);
sampleCodeBlock(m_codeBlock);
}
-void JIT::compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID)
+void JIT::compileOpCallSlowCase(OpcodeID opcodeID, 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;
-
- 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(regT2);
- Jump callLinkFailNotJSFunction = branchPtr(NotEqual, Address(regT2), ImmPtr(m_globalData->jsFunctionVPtr));
-
- // First, in the case of a construct, allocate the new object.
- if (opcodeID == op_construct) {
- JITStubCall(this, cti_op_construct_JSConstruct).call(registerOffset - RegisterFile::CallFrameHeaderSize - argCount);
- emitGetVirtualRegister(callee, regT2);
+ if (opcodeID == op_call_eval) {
+ compileCallEvalSlowCase(iter);
+ 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), regT1);
-
- m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_globalData->jitStubs.ctiVirtualCallPreLink());
-
- // Put the return value in dst.
- emitPutVirtualRegister(dst);
- sampleCodeBlock(m_codeBlock);
-
- // If not, we need an extra case in the if below!
- ASSERT(OPCODE_LENGTH(op_call) == OPCODE_LENGTH(op_call_eval));
-
- // Done! - return back to the hot path.
- if (opcodeID == op_construct)
- emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_construct));
- else
- emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_call));
-
- // This handles host functions
- callLinkFailNotObject.link(this);
- callLinkFailNotJSFunction.link(this);
- JITStubCall(this, opcodeID == op_construct ? cti_op_construct_NotJSConstruct : cti_op_call_NotJSFunction).call();
+ linkSlowCase(iter);
+
+ m_callStructureStubCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(opcodeID == op_construct ? m_globalData->jitStubs->ctiVirtualConstructLink() : m_globalData->jitStubs->ctiVirtualCallLink());
- emitPutVirtualRegister(dst);
sampleCodeBlock(m_codeBlock);
}
-/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_CALL) ------------------------------ */
-
-#endif // !ENABLE(JIT_OPTIMIZE_CALL)
-
-#endif // USE(JSVALUE32_64)
-
} // namespace JSC
+#endif // USE(JSVALUE64)
#endif // ENABLE(JIT)
projects / apple / javascriptcore.git / blobdiff