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https://github.com/darlinghq/darling-JavaScriptCore.git
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49 lines
2.1 KiB
C++
49 lines
2.1 KiB
C++
/*
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* Copyright (C) 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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namespace JSC { namespace B3 { namespace Air {
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class Code;
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// This isn't a phase - it's meant to be a utility that other phases use. Air reasons about liveness by
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// reasoning about interference at boundaries between instructions. This is convenient because it works
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// great in the most common case: early uses and late defs. However, this can go wrong - for example, a
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// late use in one instruction doesn't actually interfere with an early def of the next instruction, but
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// Air thinks that it does. It can also go wrong by having liveness incorrectly report that something is
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// dead when it isn't.
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//
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// See https://bugs.webkit.org/show_bug.cgi?id=163548#c2 for more info.
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void padInterference(Code&);
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} } } // namespace JSC::B3::Air
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#endif // ENABLE(B3_JIT)
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