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62 lines
2.5 KiB
C++
62 lines
2.5 KiB
C++
/*
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* Copyright (C) 2013, 2014 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 "DFGBasicBlock.h"
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namespace JSC { namespace DFG {
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class Graph;
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// Computes BasicBlock::ssa->availabilityAtHead/Tail. This is a forward flow type inference
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// over MovHints and SetLocals. This analysis is run directly by the Plan for preparing for
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// lowering to B3 IR, but it can also be used as a utility. Note that if you run it before
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// stack layout, all of the flush availability will omit the virtual register - but it will
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// tell you the format.
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bool performOSRAvailabilityAnalysis(Graph&);
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// Local calculator for figuring out the availability at any node in a basic block. Requires
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// having run the availability analysis.
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class LocalOSRAvailabilityCalculator {
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public:
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LocalOSRAvailabilityCalculator(Graph&);
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~LocalOSRAvailabilityCalculator();
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void beginBlock(BasicBlock*);
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void endBlock(BasicBlock*); // Useful if you want to get data for the end of the block. You don't need to call this if you did beginBlock() and then executeNode() for every node.
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void executeNode(Node*);
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AvailabilityMap m_availability;
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Graph& m_graph;
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};
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} } // namespace JSC::DFG
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#endif // ENABLE(DFG_JIT)
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