mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
/*
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* Copyright (C) 2012-2017 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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#pragma once
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// This is guarded by ENABLE_DFG_JIT only because it uses some value profiles
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// that are currently only used if the DFG is enabled (i.e. they are not
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// available in the profile-only configuration). Hopefully someday all of
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// these #if's will disappear...
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#if ENABLE(DFG_JIT)
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#include "BytecodeIndex.h"
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#include "GPRInfo.h"
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#include "Operands.h"
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#include "TagRegistersMode.h"
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namespace JSC {
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class UnaryArithProfile;
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class BinaryArithProfile;
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class CCallHelpers;
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class CodeBlock;
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class LazyOperandValueProfileKey;
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struct ValueProfile;
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class MethodOfGettingAValueProfile {
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public:
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MethodOfGettingAValueProfile()
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: m_kind(None)
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{
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}
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MethodOfGettingAValueProfile(ValueProfile* profile)
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{
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if (profile) {
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m_kind = Ready;
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u.profile = profile;
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} else
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m_kind = None;
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}
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MethodOfGettingAValueProfile(UnaryArithProfile* profile)
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{
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if (profile) {
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m_kind = UnaryArithProfileReady;
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u.unaryArithProfile = profile;
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} else
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m_kind = None;
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}
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MethodOfGettingAValueProfile(BinaryArithProfile* profile)
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{
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if (profile) {
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m_kind = BinaryArithProfileReady;
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u.binaryArithProfile = profile;
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} else
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m_kind = None;
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}
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static MethodOfGettingAValueProfile fromLazyOperand(
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CodeBlock*, const LazyOperandValueProfileKey&);
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explicit operator bool() const { return m_kind != None; }
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// The temporary register is only needed on 64-bits builds (for testing BigInt32).
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void emitReportValue(CCallHelpers&, JSValueRegs, GPRReg tempGPR, TagRegistersMode = HaveTagRegisters) const;
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void reportValue(JSValue);
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private:
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enum Kind {
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None,
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Ready,
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UnaryArithProfileReady,
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BinaryArithProfileReady,
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LazyOperand
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};
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Kind m_kind;
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union Data {
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Data()
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: profile(nullptr)
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{ }
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ValueProfile* profile;
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UnaryArithProfile* unaryArithProfile;
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BinaryArithProfile* binaryArithProfile;
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struct {
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CodeBlock* codeBlock;
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BytecodeIndex bytecodeOffset;
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Operand operand;
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} lazyOperand;
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} u;
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};
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} // namespace JSC
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#endif // ENABLE(DFG_JIT)
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