mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-26 21:50:53 +00:00
137 lines
3.8 KiB
C++
137 lines
3.8 KiB
C++
/*
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* Copyright (C) 2014-2016 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(DFG_JIT)
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#include "CodeOrigin.h"
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#include "DFGClobbersExitState.h"
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namespace JSC { namespace DFG {
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class Graph;
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struct Node;
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struct NodeOrigin {
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NodeOrigin() { }
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NodeOrigin(CodeOrigin semantic, CodeOrigin forExit, bool exitOK)
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: semantic(semantic)
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, forExit(forExit)
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, exitOK(exitOK)
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{
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}
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bool isSet() const
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{
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ASSERT(semantic.isSet() == forExit.isSet());
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return semantic.isSet();
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}
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NodeOrigin withSemantic(CodeOrigin semantic) const
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{
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if (!isSet())
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return NodeOrigin();
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NodeOrigin result = *this;
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if (semantic.isSet())
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result.semantic = semantic;
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return result;
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}
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NodeOrigin withForExitAndExitOK(CodeOrigin forExit, bool exitOK) const
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{
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if (!isSet())
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return NodeOrigin();
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NodeOrigin result = *this;
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if (forExit.isSet())
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result.forExit = forExit;
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result.exitOK = exitOK;
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return result;
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}
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NodeOrigin withExitOK(bool value) const
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{
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NodeOrigin result = *this;
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result.exitOK = value;
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return result;
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}
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NodeOrigin withInvalidExit() const
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{
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return withExitOK(false);
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}
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NodeOrigin takeValidExit(bool& canExit) const
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{
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return withExitOK(exitOK & std::exchange(canExit, false));
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}
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NodeOrigin withWasHoisted() const
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{
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NodeOrigin result = *this;
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result.wasHoisted = true;
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return result;
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}
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NodeOrigin forInsertingAfter(Graph& graph, Node* node) const
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{
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NodeOrigin result = *this;
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if (exitOK && clobbersExitState(graph, node))
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result.exitOK = false;
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return result;
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}
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bool operator==(const NodeOrigin& other) const
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{
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return semantic == other.semantic
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&& forExit == other.forExit
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&& exitOK == other.exitOK;
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}
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bool operator!=(const NodeOrigin& other) const
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{
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return !(*this == other);
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}
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void dump(PrintStream&) const;
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// Used for determining what bytecode this came from. This is important for
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// debugging, exceptions, and even basic execution semantics.
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CodeOrigin semantic;
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// Code origin for where the node exits to.
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CodeOrigin forExit;
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// Whether or not it is legal to exit here.
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bool exitOK { false };
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// Whether or not the node has been hoisted.
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bool wasHoisted { false };
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};
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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