mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-23 04:09:40 +00:00
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
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* Copyright (C) 2013-2019 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 "DFGGraph.h"
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namespace JSC { namespace DFG {
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class EdgeDominates {
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static constexpr bool verbose = false;
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public:
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EdgeDominates(Graph& graph, BasicBlock* block)
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: m_graph(graph)
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, m_block(block)
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, m_result(true)
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{
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ASSERT(graph.m_form == SSA);
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}
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void operator()(Node*, Edge edge)
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{
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bool result = m_graph.m_ssaDominators->dominates(edge.node()->owner, m_block);
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if (verbose) {
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dataLog(
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"Checking if ", edge, " in ", *edge.node()->owner,
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" dominates ", *m_block, ": ", result, "\n");
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}
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m_result &= result;
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}
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bool result() const { return m_result; }
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private:
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Graph& m_graph;
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BasicBlock* m_block;
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bool m_result;
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};
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inline bool edgesDominate(Graph& graph, Node* node, BasicBlock* block)
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{
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EdgeDominates edgeDominates(graph, block);
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DFG_NODE_DO_TO_CHILDREN(graph, node, edgeDominates);
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return edgeDominates.result();
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}
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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