82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef jit_AliasAnalysisShared_h
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#define jit_AliasAnalysisShared_h
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#include "jit/MIR.h"
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#include "jit/MIRGraph.h"
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namespace js {
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namespace jit {
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class MIRGraph;
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class AliasAnalysisShared
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{
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protected:
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MIRGenerator* mir;
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MIRGraph& graph_;
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public:
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AliasAnalysisShared(MIRGenerator* mir, MIRGraph& graph)
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: mir(mir),
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graph_(graph)
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{}
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virtual MOZ_MUST_USE bool analyze() {
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return true;
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}
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static MDefinition::AliasType genericMightAlias(const MDefinition* load,
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const MDefinition* store);
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protected:
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void spewDependencyList();
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TempAllocator& alloc() const {
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return graph_.alloc();
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}
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};
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// Iterates over the flags in an AliasSet.
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class AliasSetIterator
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{
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private:
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uint32_t flags;
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unsigned pos;
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public:
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explicit AliasSetIterator(AliasSet set)
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: flags(set.flags()), pos(0)
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{
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while (flags && (flags & 1) == 0) {
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flags >>= 1;
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pos++;
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}
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}
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AliasSetIterator& operator ++(int) {
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do {
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flags >>= 1;
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pos++;
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} while (flags && (flags & 1) == 0);
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return *this;
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}
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explicit operator bool() const {
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return !!flags;
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}
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unsigned operator*() const {
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MOZ_ASSERT(pos < AliasSet::NumCategories);
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return pos;
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}
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};
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} // namespace jit
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} // namespace js
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#endif /* jit_AliasAnalysisShared_h */
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