mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
/*
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* Copyright (C) 2015 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(DFG_JIT)
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namespace JSC { namespace DFG {
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class Graph;
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// This phase ensures we keep all locals/arguments flushed.
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// What this means is: any node inbetween a SetLocal and a Flush should
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// be able to observe that particular local on the stack. This phase patterns
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// the graph by inserting a Flush before each SetLocal such that the Flush
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// we inserted can do a backwards search through all paths in the CFG and
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// reach a SetLocal.
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// ....
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// SetLocal(locX)
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// <
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// |
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// ... We ensure that locX is available on the stack to any nodes in this region that may ask for locX.
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// |
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// >
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// Flush(locX)
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// SetLocal(locX)
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bool performMaximalFlushInsertion(Graph&);
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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