69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (C) 2015-2016 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 "B3StackmapSpecial.h"
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namespace JSC { namespace B3 {
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// This is a special that recognizes that there are two uses of Patchpoint: Void and and non-Void.
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// In the Void case, the syntax of the Air Patch instruction is:
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//
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// Patch &patchpoint, args...
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//
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// Where "args..." are the lowered arguments to the Patchpoint instruction. In the non-Void case
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// we will have:
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//
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// Patch &patchpoint, result, args...
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class PatchpointSpecial final : public StackmapSpecial {
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public:
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JS_EXPORT_PRIVATE PatchpointSpecial();
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JS_EXPORT_PRIVATE ~PatchpointSpecial() final;
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private:
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void forEachArg(Air::Inst&, const ScopedLambda<Air::Inst::EachArgCallback>&) final;
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bool isValid(Air::Inst&) final;
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bool admitsStack(Air::Inst&, unsigned argIndex) final;
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bool admitsExtendedOffsetAddr(Air::Inst&, unsigned) final;
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// NOTE: the generate method will generate the hidden branch and then register a LatePath that
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// generates the stackmap. Super crazy dude!
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MacroAssembler::Jump generate(Air::Inst&, CCallHelpers&, Air::GenerationContext&) final;
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bool isTerminal(Air::Inst&) final;
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void dumpImpl(PrintStream&) const final;
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void deepDumpImpl(PrintStream&) const final;
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};
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} } // namespace JSC::B3
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#endif // ENABLE(B3_JIT)
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