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Diffstat (limited to 'Source/JavaScriptCore/b3/B3PatchpointSpecial.h')
| -rw-r--r-- | Source/JavaScriptCore/b3/B3PatchpointSpecial.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/b3/B3PatchpointSpecial.h b/Source/JavaScriptCore/b3/B3PatchpointSpecial.h new file mode 100644 index 000000000..4e1b2a319 --- /dev/null +++ b/Source/JavaScriptCore/b3/B3PatchpointSpecial.h @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2015-2016 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 "B3StackmapSpecial.h" + +namespace JSC { namespace B3 { + +// This is a special that recognizes that there are two uses of Patchpoint: Void and and non-Void. +// In the Void case, the syntax of the Air Patch instruction is: +// +// Patch &patchpoint, args... +// +// Where "args..." are the lowered arguments to the Patchpoint instruction. In the non-Void case +// we will have: +// +// Patch &patchpoint, result, args... + +class PatchpointSpecial : public StackmapSpecial { +public: + PatchpointSpecial(); + virtual ~PatchpointSpecial(); + +protected: + void forEachArg(Air::Inst&, const ScopedLambda<Air::Inst::EachArgCallback>&) override; + bool isValid(Air::Inst&) override; + bool admitsStack(Air::Inst&, unsigned argIndex) override; + + // NOTE: the generate method will generate the hidden branch and then register a LatePath that + // generates the stackmap. Super crazy dude! + + CCallHelpers::Jump generate(Air::Inst&, CCallHelpers&, Air::GenerationContext&) override; + + bool isTerminal(Air::Inst&) override; + + void dumpImpl(PrintStream&) const override; + void deepDumpImpl(PrintStream&) const override; +}; + +} } // namespace JSC::B3 + +#endif // ENABLE(B3_JIT) |