mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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90 lines
3.3 KiB
C++
90 lines
3.3 KiB
C++
/*
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* Copyright (C) 2015-2017 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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#if ENABLE(B3_JIT)
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#include "AirArg.h"
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#include "AirSpecial.h"
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#include "B3ValueRep.h"
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namespace JSC { namespace B3 {
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namespace Air { class Code; }
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// This is a base class for specials that have stackmaps. Note that it can find the Stackmap by
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// asking for the Inst's origin. Hence, these objects don't need to even hold a reference to the
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// Stackmap.
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class StackmapSpecial : public Air::Special {
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public:
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StackmapSpecial();
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~StackmapSpecial() override;
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enum RoleMode : int8_t {
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SameAsRep,
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ForceLateUseUnlessRecoverable,
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ForceLateUse
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};
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protected:
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void reportUsedRegisters(Air::Inst&, const RegisterSet&) final;
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RegisterSet extraEarlyClobberedRegs(Air::Inst&) final;
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RegisterSet extraClobberedRegs(Air::Inst&) final;
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// Note that this does not override generate() or dumpImpl()/deepDumpImpl(). We have many
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// subclasses that implement that.
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void forEachArgImpl(
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unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
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Air::Inst&, RoleMode, Optional<unsigned> firstRecoverableIndex,
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const ScopedLambda<Air::Inst::EachArgCallback>&, Optional<Width> optionalDefArgWidth);
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bool isValidImpl(
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unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
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Air::Inst&);
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bool admitsStackImpl(
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unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
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Air::Inst&, unsigned argIndex);
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// Appends the reps for the Inst's args, starting with numIgnoredArgs, to the given vector.
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Vector<ValueRep> repsImpl(
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Air::GenerationContext&, unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs, Air::Inst&);
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static bool isArgValidForType(const Air::Arg&, Type);
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static bool isArgValidForRep(Air::Code&, const Air::Arg&, const ValueRep&);
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static ValueRep repForArg(Air::Code&, const Air::Arg&);
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};
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} } // namespace JSC::B3
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namespace WTF {
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void printInternal(PrintStream&, JSC::B3::StackmapSpecial::RoleMode);
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} // namespace WTF
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#endif // ENABLE(B3_JIT)
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