mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2025-04-08 18:01:37 +00:00
641 lines
24 KiB
C++
641 lines
24 KiB
C++
/*
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* Copyright (C) 2020 Igalia, S.L. All rights reserved.
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* Copyright (C) 2020 Metrological Group B.V.
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* Copyright (C) 2008-2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#if ENABLE(JIT)
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#if USE(JSVALUE32_64)
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#include "JIT.h"
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#include "CacheableIdentifierInlines.h"
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#include "CodeBlock.h"
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#include "Interpreter.h"
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#include "JITInlines.h"
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#include "JSArray.h"
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#include "JSFunction.h"
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#include "JSCInlines.h"
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#include "LinkBuffer.h"
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#include "OpcodeInlines.h"
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#include "ResultType.h"
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#include "SetupVarargsFrame.h"
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#include "SlowPathCall.h"
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#include "StackAlignment.h"
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#include "ThunkGenerators.h"
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#include <wtf/StringPrintStream.h>
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namespace JSC {
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template<typename Op>
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void JIT::emitPutCallResult(const Op& bytecode)
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{
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emitValueProfilingSite(bytecode.metadata(m_codeBlock), JSValueRegs(regT1, regT0));
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emitStore(destinationFor(bytecode, m_bytecodeIndex.checkpoint()).virtualRegister(), regT1, regT0);
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}
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void JIT::emit_op_ret(const Instruction* currentInstruction)
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{
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auto bytecode = currentInstruction->as<OpRet>();
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VirtualRegister value = bytecode.m_value;
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emitLoad(value, regT1, regT0);
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checkStackPointerAlignment();
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emitRestoreCalleeSaves();
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emitFunctionEpilogue();
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ret();
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}
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void JIT::emitSlow_op_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpCall>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_tail_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpTailCall>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_call_eval(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpCallEval>(currentInstruction, iter, m_callLinkInfoIndex);
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}
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void JIT::emitSlow_op_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_tail_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpTailCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_tail_call_forward_arguments(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpTailCallForwardArguments>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_construct_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpConstructVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emitSlow_op_construct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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compileOpCallSlowCase<OpConstruct>(currentInstruction, iter, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_call(const Instruction* currentInstruction)
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{
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compileOpCall<OpCall>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_tail_call(const Instruction* currentInstruction)
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{
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compileOpCall<OpTailCall>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_call_eval(const Instruction* currentInstruction)
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{
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compileOpCall<OpCallEval>(currentInstruction, m_callLinkInfoIndex);
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}
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void JIT::emit_op_call_varargs(const Instruction* currentInstruction)
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{
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compileOpCall<OpCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_tail_call_varargs(const Instruction* currentInstruction)
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{
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compileOpCall<OpTailCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_tail_call_forward_arguments(const Instruction* currentInstruction)
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{
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compileOpCall<OpTailCallForwardArguments>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_construct_varargs(const Instruction* currentInstruction)
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{
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compileOpCall<OpConstructVarargs>(currentInstruction, m_callLinkInfoIndex++);
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}
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void JIT::emit_op_construct(const Instruction* currentInstruction)
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{
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compileOpCall<OpConstruct>(currentInstruction, m_callLinkInfoIndex++);
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}
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template <typename Op>
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std::enable_if_t<
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Op::opcodeID != op_call_varargs && Op::opcodeID != op_construct_varargs
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&& Op::opcodeID != op_tail_call_varargs && Op::opcodeID != op_tail_call_forward_arguments
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, void>
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JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo*)
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{
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unsigned checkpoint = m_bytecodeIndex.checkpoint();
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auto& metadata = bytecode.metadata(m_codeBlock);
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int argCount = argumentCountIncludingThisFor(bytecode, checkpoint);
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int registerOffset = -static_cast<int>(stackOffsetInRegistersForCall(bytecode, checkpoint));
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if (Op::opcodeID == op_call && shouldEmitProfiling()) {
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emitLoad(VirtualRegister(registerOffset + CallFrame::argumentOffsetIncludingThis(0)), regT0, regT1);
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Jump done = branchIfNotCell(regT0);
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load32(Address(regT1, JSCell::structureIDOffset()), regT1);
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store32(regT1, metadata.m_callLinkInfo.m_arrayProfile.addressOfLastSeenStructureID());
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done.link(this);
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}
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addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
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store32(TrustedImm32(argCount), Address(stackPointerRegister, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
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}
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template<typename Op>
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std::enable_if_t<
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Op::opcodeID == op_call_varargs || Op::opcodeID == op_construct_varargs
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|| Op::opcodeID == op_tail_call_varargs || Op::opcodeID == op_tail_call_forward_arguments
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, void>
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JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo* info)
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{
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OpcodeID opcodeID = Op::opcodeID;
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VirtualRegister thisValue = bytecode.m_thisValue;
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VirtualRegister arguments = bytecode.m_arguments;
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int firstFreeRegister = bytecode.m_firstFree.offset();
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int firstVarArgOffset = bytecode.m_firstVarArg;
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emitLoad(arguments, regT1, regT0);
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Z_JITOperation_GJZZ sizeOperation;
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if (Op::opcodeID == op_tail_call_forward_arguments)
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sizeOperation = operationSizeFrameForForwardArguments;
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else
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sizeOperation = operationSizeFrameForVarargs;
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callOperation(sizeOperation, m_codeBlock->globalObject(), JSValueRegs(regT1, regT0), -firstFreeRegister, firstVarArgOffset);
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move(TrustedImm32(-firstFreeRegister), regT1);
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emitSetVarargsFrame(*this, returnValueGPR, false, regT1, regT1);
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addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 6 * sizeof(void*)))), regT1, stackPointerRegister);
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emitLoad(arguments, regT2, regT4);
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F_JITOperation_GFJZZ setupOperation;
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if (opcodeID == op_tail_call_forward_arguments)
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setupOperation = operationSetupForwardArgumentsFrame;
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else
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setupOperation = operationSetupVarargsFrame;
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callOperation(setupOperation, m_codeBlock->globalObject(), regT1, JSValueRegs(regT2, regT4), firstVarArgOffset, regT0);
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move(returnValueGPR, regT1);
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// Profile the argument count.
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load32(Address(regT1, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
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load32(info->addressOfMaxArgumentCountIncludingThis(), regT0);
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Jump notBiggest = branch32(Above, regT0, regT2);
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store32(regT2, info->addressOfMaxArgumentCountIncludingThis());
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notBiggest.link(this);
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// Initialize 'this'.
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emitLoad(thisValue, regT2, regT0);
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store32(regT0, Address(regT1, PayloadOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
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store32(regT2, Address(regT1, TagOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
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addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
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}
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template<typename Op>
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bool JIT::compileCallEval(const Op&)
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{
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return false;
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}
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template<>
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bool JIT::compileCallEval(const OpCallEval& bytecode)
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{
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addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
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storePtr(callFrameRegister, Address(regT1, CallFrame::callerFrameOffset()));
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addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
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move(TrustedImm32(bytecode.m_ecmaMode.value()), regT2);
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callOperation(operationCallEval, m_codeBlock->globalObject(), regT1, regT2);
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addSlowCase(branchIfEmpty(regT1));
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sampleCodeBlock(m_codeBlock);
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emitPutCallResult(bytecode);
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return true;
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}
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void JIT::compileCallEvalSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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linkAllSlowCases(iter);
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auto bytecode = instruction->as<OpCallEval>();
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CallLinkInfo* info = m_codeBlock->addCallLinkInfo(CodeOrigin(m_bytecodeIndex));
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info->setUpCall(CallLinkInfo::Call, regT0);
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int registerOffset = -bytecode.m_argv;
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VirtualRegister callee = bytecode.m_callee;
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addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
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emitLoad(callee, regT1, regT0);
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emitVirtualCall(vm(), m_codeBlock->globalObject(), info);
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addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
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checkStackPointerAlignment();
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sampleCodeBlock(m_codeBlock);
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emitPutCallResult(bytecode);
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}
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template <typename Op>
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void JIT::compileOpCall(const Instruction* instruction, unsigned callLinkInfoIndex)
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{
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OpcodeID opcodeID = Op::opcodeID;
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auto bytecode = instruction->as<Op>();
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VirtualRegister callee = calleeFor(bytecode, m_bytecodeIndex.checkpoint());
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/* Caller always:
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- Updates callFrameRegister to callee callFrame.
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- Initializes ArgumentCount; CallerFrame; Callee.
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For a JS call:
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- Callee initializes ReturnPC; CodeBlock.
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- Callee restores callFrameRegister before return.
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For a non-JS call:
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- Caller initializes ReturnPC; CodeBlock.
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- Caller restores callFrameRegister after return.
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*/
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CallLinkInfo* info = nullptr;
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if (opcodeID != op_call_eval)
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info = m_codeBlock->addCallLinkInfo(CodeOrigin(m_bytecodeIndex));
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compileSetupFrame(bytecode, info);
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// SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
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auto bytecodeIndex = m_codeBlock->bytecodeIndex(instruction);
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uint32_t locationBits = CallSiteIndex(bytecodeIndex).bits();
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store32(TrustedImm32(locationBits), tagFor(CallFrameSlot::argumentCountIncludingThis));
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emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.
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store32(regT0, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
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store32(regT1, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC)));
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if (compileCallEval(bytecode))
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return;
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if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs)
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emitRestoreCalleeSaves();
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addSlowCase(branchIfNotCell(regT1));
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DataLabelPtr addressOfLinkedFunctionCheck;
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Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(nullptr));
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addSlowCase(slowCase);
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ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
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info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), regT0);
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m_callCompilationInfo.append(CallCompilationInfo());
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m_callCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
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m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
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checkStackPointerAlignment();
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if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments) {
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prepareForTailCallSlow();
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m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedNearTailCall();
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return;
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}
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m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedNearCall();
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addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
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checkStackPointerAlignment();
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sampleCodeBlock(m_codeBlock);
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emitPutCallResult(bytecode);
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}
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template <typename Op>
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void JIT::compileOpCallSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
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{
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OpcodeID opcodeID = Op::opcodeID;
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if (opcodeID == op_call_eval) {
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compileCallEvalSlowCase(instruction, iter);
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return;
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}
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linkAllSlowCases(iter);
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move(TrustedImmPtr(m_codeBlock->globalObject()), regT3);
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move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
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if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments)
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emitRestoreCalleeSaves();
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m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedNearCall(m_vm->getCTIStub(linkCallThunkGenerator).retaggedCode<NoPtrTag>());
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if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs) {
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abortWithReason(JITDidReturnFromTailCall);
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return;
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}
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addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
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checkStackPointerAlignment();
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sampleCodeBlock(m_codeBlock);
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auto bytecode = instruction->as<Op>();
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emitPutCallResult(bytecode);
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}
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void JIT::emit_op_iterator_open(const Instruction* instruction)
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{
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auto bytecode = instruction->as<OpIteratorOpen>();
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auto* tryFastFunction = ([&] () {
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switch (instruction->width()) {
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case Narrow: return iterator_open_try_fast_narrow;
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case Wide16: return iterator_open_try_fast_wide16;
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case Wide32: return iterator_open_try_fast_wide32;
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default: RELEASE_ASSERT_NOT_REACHED();
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}
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})();
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JITSlowPathCall slowPathCall(this, instruction, tryFastFunction);
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slowPathCall.call();
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Jump fastCase = branch32(NotEqual, GPRInfo::returnValueGPR2, TrustedImm32(static_cast<uint32_t>(IterationMode::Generic)));
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compileOpCall<OpIteratorOpen>(instruction, m_callLinkInfoIndex++);
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advanceToNextCheckpoint();
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// call result (iterator) is in regT1 (tag)/regT0 (payload)
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const Identifier* ident = &vm().propertyNames->next;
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emitJumpSlowCaseIfNotJSCell(regT1);
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GPRReg tagIteratorGPR = regT1;
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GPRReg payloadIteratorGPR = regT0;
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GPRReg tagNextGPR = tagIteratorGPR;
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GPRReg payloadNextGPR = payloadIteratorGPR;
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JSValueRegs nextRegs = JSValueRegs(tagNextGPR, payloadNextGPR);
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JITGetByIdGenerator gen(
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m_codeBlock,
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CodeOrigin(m_bytecodeIndex),
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CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
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RegisterSet::stubUnavailableRegisters(),
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CacheableIdentifier::createFromImmortalIdentifier(ident->impl()),
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JSValueRegs(tagIteratorGPR, payloadIteratorGPR),
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nextRegs,
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AccessType::GetById);
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gen.generateFastPath(*this);
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addSlowCase(gen.slowPathJump());
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m_getByIds.append(gen);
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emitValueProfilingSite(bytecode.metadata(m_codeBlock), nextRegs);
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emitPutVirtualRegister(bytecode.m_next, nextRegs);
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fastCase.link(this);
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}
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void JIT::emitSlow_op_iterator_open(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
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{
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linkAllSlowCases(iter);
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compileOpCallSlowCase<OpIteratorOpen>(instruction, iter, m_callLinkInfoIndex++);
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emitJumpSlowToHotForCheckpoint(jump());
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linkAllSlowCases(iter);
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GPRReg tagIteratorGPR = regT1;
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GPRReg payloadIteratorGPR = regT0;
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JumpList notObject;
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notObject.append(branchIfNotCell(tagIteratorGPR));
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notObject.append(branchIfNotObject(payloadIteratorGPR));
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auto bytecode = instruction->as<OpIteratorOpen>();
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VirtualRegister nextVReg = bytecode.m_next;
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UniquedStringImpl* ident = vm().propertyNames->next.impl();
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JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
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Label coldPathBegin = label();
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Call call = callOperationWithProfile(
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bytecode.metadata(m_codeBlock), // metadata
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operationGetByIdOptimize, // operation
|
|
nextVReg, // result
|
|
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
|
|
gen.stubInfo(), // arg2
|
|
JSValueRegs(tagIteratorGPR, payloadIteratorGPR), // arg3
|
|
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
|
|
|
|
gen.reportSlowPathCall(coldPathBegin, call);
|
|
auto done = jump();
|
|
|
|
notObject.link(this);
|
|
callOperation(operationThrowIteratorResultIsNotObject, TrustedImmPtr(m_codeBlock->globalObject()));
|
|
|
|
done.link(this);
|
|
}
|
|
|
|
void JIT::emit_op_iterator_next(const Instruction* instruction)
|
|
{
|
|
auto bytecode = instruction->as<OpIteratorNext>();
|
|
auto& metadata = bytecode.metadata(m_codeBlock);
|
|
auto* tryFastFunction = ([&] () {
|
|
switch (instruction->width()) {
|
|
case Narrow: return iterator_next_try_fast_narrow;
|
|
case Wide16: return iterator_next_try_fast_wide16;
|
|
case Wide32: return iterator_next_try_fast_wide32;
|
|
default: RELEASE_ASSERT_NOT_REACHED();
|
|
}
|
|
})();
|
|
|
|
JSValueRegs nextRegs(regT1, regT0);
|
|
emitGetVirtualRegister(bytecode.m_next, nextRegs);
|
|
Jump genericCase = branchIfNotEmpty(nextRegs);
|
|
|
|
JITSlowPathCall slowPathCall(this, instruction, tryFastFunction);
|
|
slowPathCall.call();
|
|
Jump fastCase = branch32(NotEqual, GPRInfo::returnValueGPR2, TrustedImm32(static_cast<uint32_t>(IterationMode::Generic)));
|
|
|
|
genericCase.link(this);
|
|
or8(TrustedImm32(static_cast<uint8_t>(IterationMode::Generic)), AbsoluteAddress(&metadata.m_iterationMetadata.seenModes));
|
|
compileOpCall<OpIteratorNext>(instruction, m_callLinkInfoIndex++);
|
|
advanceToNextCheckpoint();
|
|
// call result ({ done, value } JSObject) in regT1, regT0
|
|
|
|
GPRReg tagValueGPR = regT1;
|
|
GPRReg payloadValueGPR = regT0;
|
|
|
|
GPRReg tagDoneGPR = regT5;
|
|
GPRReg payloadDoneGPR = regT4;
|
|
|
|
{
|
|
JSValueRegs doneRegs = JSValueRegs(tagDoneGPR, payloadDoneGPR);
|
|
|
|
GPRReg tagIterResultGPR = regT3;
|
|
GPRReg payloadIterResultGPR = regT2;
|
|
|
|
// iterResultGPR will get trashed by the first get by id below.
|
|
move(regT1, tagIterResultGPR);
|
|
move(regT0, payloadIterResultGPR);
|
|
|
|
emitJumpSlowCaseIfNotJSCell(tagIterResultGPR);
|
|
|
|
RegisterSet preservedRegs = RegisterSet::stubUnavailableRegisters();
|
|
preservedRegs.add(tagValueGPR);
|
|
preservedRegs.add(payloadValueGPR);
|
|
JITGetByIdGenerator gen(
|
|
m_codeBlock,
|
|
CodeOrigin(m_bytecodeIndex),
|
|
CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
|
|
preservedRegs,
|
|
CacheableIdentifier::createFromImmortalIdentifier(vm().propertyNames->done.impl()),
|
|
JSValueRegs(tagIterResultGPR, payloadIterResultGPR),
|
|
doneRegs,
|
|
AccessType::GetById);
|
|
gen.generateFastPath(*this);
|
|
addSlowCase(gen.slowPathJump());
|
|
m_getByIds.append(gen);
|
|
|
|
emitValueProfilingSite(metadata, doneRegs);
|
|
emitPutVirtualRegister(bytecode.m_done, doneRegs);
|
|
advanceToNextCheckpoint();
|
|
}
|
|
|
|
{
|
|
JSValueRegs resultRegs = JSValueRegs(tagValueGPR, payloadValueGPR);
|
|
GPRReg tagIterResultGPR = regT1;
|
|
GPRReg payloadIterResultGPR = regT0;
|
|
|
|
GPRReg scratch1 = regT6;
|
|
GPRReg scratch2 = regT7;
|
|
const bool shouldCheckMasqueradesAsUndefined = false;
|
|
JumpList iterationDone = branchIfTruthy(vm(), JSValueRegs(tagDoneGPR, payloadDoneGPR), scratch1, scratch2, fpRegT0, fpRegT1, shouldCheckMasqueradesAsUndefined, m_codeBlock->globalObject());
|
|
|
|
JITGetByIdGenerator gen(
|
|
m_codeBlock,
|
|
CodeOrigin(m_bytecodeIndex),
|
|
CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
|
|
RegisterSet::stubUnavailableRegisters(),
|
|
CacheableIdentifier::createFromImmortalIdentifier(vm().propertyNames->value.impl()),
|
|
JSValueRegs(tagIterResultGPR, payloadIterResultGPR),
|
|
resultRegs,
|
|
AccessType::GetById);
|
|
gen.generateFastPath(*this);
|
|
addSlowCase(gen.slowPathJump());
|
|
m_getByIds.append(gen);
|
|
|
|
emitValueProfilingSite(metadata, resultRegs);
|
|
emitPutVirtualRegister(bytecode.m_value, resultRegs);
|
|
|
|
iterationDone.link(this);
|
|
}
|
|
|
|
fastCase.link(this);
|
|
}
|
|
|
|
void JIT::emitSlow_op_iterator_next(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
|
|
{
|
|
linkAllSlowCases(iter);
|
|
compileOpCallSlowCase<OpIteratorNext>(instruction, iter, m_callLinkInfoIndex++);
|
|
emitJumpSlowToHotForCheckpoint(jump());
|
|
|
|
auto bytecode = instruction->as<OpIteratorNext>();
|
|
{
|
|
VirtualRegister doneVReg = bytecode.m_done;
|
|
GPRReg tagValueGPR = regT1;
|
|
GPRReg payloadValueGPR = regT0;
|
|
|
|
GPRReg tagIterResultGPR = regT3;
|
|
GPRReg payloadIterResultGPR = regT2;
|
|
|
|
GPRReg tagDoneGPR = regT5;
|
|
GPRReg payloadDoneGPR = regT4;
|
|
|
|
linkAllSlowCases(iter);
|
|
JumpList notObject;
|
|
notObject.append(branchIfNotCell(tagIterResultGPR));
|
|
notObject.append(branchIfNotObject(payloadIterResultGPR));
|
|
|
|
UniquedStringImpl* ident = vm().propertyNames->done.impl();
|
|
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
|
|
|
|
Label coldPathBegin = label();
|
|
|
|
Call call = callOperationWithProfile(
|
|
bytecode.metadata(m_codeBlock), // metadata
|
|
operationGetByIdOptimize, // operation
|
|
doneVReg, // result
|
|
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
|
|
gen.stubInfo(), // arg2
|
|
JSValueRegs(tagIterResultGPR, payloadIterResultGPR), // arg3
|
|
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
|
|
|
|
gen.reportSlowPathCall(coldPathBegin, call);
|
|
emitGetVirtualRegister(doneVReg, JSValueRegs(tagDoneGPR, payloadDoneGPR));
|
|
emitGetVirtualRegister(bytecode.m_value, JSValueRegs(tagValueGPR, payloadValueGPR));
|
|
emitJumpSlowToHotForCheckpoint(jump());
|
|
|
|
notObject.link(this);
|
|
callOperation(operationThrowIteratorResultIsNotObject, TrustedImmPtr(m_codeBlock->globalObject()));
|
|
}
|
|
|
|
{
|
|
GPRReg tagIterResultGPR = regT1;
|
|
GPRReg payloadIterResultGPR = regT0;
|
|
|
|
linkAllSlowCases(iter);
|
|
VirtualRegister valueVReg = bytecode.m_value;
|
|
|
|
UniquedStringImpl* ident = vm().propertyNames->value.impl();
|
|
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
|
|
|
|
Label coldPathBegin = label();
|
|
|
|
Call call = callOperationWithProfile(
|
|
bytecode.metadata(m_codeBlock), // metadata
|
|
operationGetByIdOptimize, // operation
|
|
valueVReg, // result
|
|
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
|
|
gen.stubInfo(), // arg2
|
|
JSValueRegs(tagIterResultGPR, payloadIterResultGPR), // arg3
|
|
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
|
|
|
|
gen.reportSlowPathCall(coldPathBegin, call);
|
|
}
|
|
}
|
|
|
|
} // namespace JSC
|
|
|
|
#endif // USE(JSVALUE32_64)
|
|
#endif // ENABLE(JIT)
|