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/*
* Copyright (C) 2015-2023 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(B3_JIT)
#include "AirArg.h"
#include "AirSpecial.h"
#include "B3ValueRep.h"
#include <wtf/TZoneMalloc.h>
namespace JSC { namespace B3 {
namespace Air { class Code; }
// This is a base class for specials that have stackmaps. Note that it can find the Stackmap by
// asking for the Inst's origin. Hence, these objects don't need to even hold a reference to the
// Stackmap.
class StackmapSpecial : public Air::Special {
WTF_MAKE_TZONE_ALLOCATED_EXPORT(StackmapSpecial, JS_EXPORT_PRIVATE);
public:
StackmapSpecial();
~StackmapSpecial() override;
enum RoleMode : int8_t {
SameAsRep,
ForceLateUseUnlessRecoverable,
ForceLateUse
};
protected:
void reportUsedRegisters(Air::Inst&, const RegisterSetBuilder&) final;
RegisterSetBuilder extraEarlyClobberedRegs(Air::Inst&) final;
RegisterSetBuilder extraClobberedRegs(Air::Inst&) final;
// Note that this does not override generate() or dumpImpl()/deepDumpImpl(). We have many
// subclasses that implement that.
void forEachArgImpl(
unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
Air::Inst&, RoleMode, std::optional<unsigned> firstRecoverableIndex,
const ScopedLambda<Air::Inst::EachArgCallback>&, std::optional<Width> optionalDefArgWidth);
bool isValidImpl(
unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
Air::Inst&);
bool admitsStackImpl(
unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs,
Air::Inst&, unsigned argIndex);
// Appends the reps for the Inst's args, starting with numIgnoredArgs, to the given vector.
Vector<ValueRep> repsImpl(
Air::GenerationContext&, unsigned numIgnoredB3Args, unsigned numIgnoredAirArgs, Air::Inst&);
static bool isArgValidForType(const Air::Arg&, Type);
static bool isArgValidForRep(Air::Code&, const Air::Arg&, const ValueRep&);
static ValueRep repForArg(Air::Code&, const Air::Arg&);
};
} } // namespace JSC::B3
namespace WTF {
void printInternal(PrintStream&, JSC::B3::StackmapSpecial::RoleMode);
} // namespace WTF
#endif // ENABLE(B3_JIT)
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