mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* Copyright (C) 2018 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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#include "BytecodeIndex.h"
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#include "ExitFlag.h"
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namespace JSC {
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class CodeBlock;
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class StructureSet;
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template<typename VariantVectorType, typename VariantType>
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bool appendICStatusVariant(VariantVectorType& variants, const VariantType& variant)
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{
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// Attempt to merge this variant with an already existing variant.
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for (unsigned i = 0; i < variants.size(); ++i) {
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VariantType& mergedVariant = variants[i];
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if (mergedVariant.attemptToMerge(variant)) {
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for (unsigned j = 0; j < variants.size(); ++j) {
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if (i == j)
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continue;
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if (variants[j].overlaps(mergedVariant))
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return false;
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}
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return true;
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}
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}
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// Make sure there is no overlap. We should have pruned out opportunities for
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// overlap but it's possible that an inline cache got into a weird state. We are
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// defensive and bail if we detect crazy.
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for (unsigned i = 0; i < variants.size(); ++i) {
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if (variants[i].overlaps(variant))
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return false;
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}
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variants.append(variant);
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return true;
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}
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template<typename VariantVectorType>
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void filterICStatusVariants(VariantVectorType& variants, const StructureSet& set)
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{
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variants.removeAllMatching(
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[&] (auto& variant) -> bool {
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variant.structureSet().filter(set);
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return variant.structureSet().isEmpty();
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});
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}
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ExitFlag hasBadCacheExitSite(CodeBlock* profiledBlock, BytecodeIndex);
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} // namespace JSC
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