зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
2.3 KiB
C++
69 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef _LIVENESS_H_
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#define _LIVENESS_H_
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#include "Fundamentals.h"
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#include "ControlGraph.h"
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class Pool;
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class FastBitSet;
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class VirtualRegisterManager;
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class Liveness
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{
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private:
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Pool& pool; // Pool for local memory allocation.
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FastBitSet* liveIn; // Array of LiveIn bitsets
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FastBitSet* liveOut; // Array of LiveOut bitsets
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Uint32 size; // Size of the arrays.
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private:
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void buildAcyclicLivenessAnalysis(const ControlGraph& controlGraph, const VirtualRegisterManager& vrManager);
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void buildCyclicLivenessAnalysis(const ControlGraph& controlGraph, const VirtualRegisterManager& vrManager);
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void operator = (const Liveness&); // No copy operator.
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Liveness(const Liveness&); // No copy constructor.
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public:
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Liveness(Pool& pool) : pool(pool) {}
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inline void buildLivenessAnalysis(const ControlGraph& controlGraph, const VirtualRegisterManager& vrManager);
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FastBitSet& getLiveIn(Uint32 blockNumber) {PR_ASSERT(blockNumber < size); return liveIn[blockNumber];}
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FastBitSet& getLiveOut(Uint32 blockNumber) {PR_ASSERT(blockNumber < size); return liveOut[blockNumber];}
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DEBUG_LOG_ONLY(void printPretty(FILE* f));
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};
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inline void Liveness::buildLivenessAnalysis(const ControlGraph& controlGraph, const VirtualRegisterManager& vrManager)
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{
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if (controlGraph.hasBackEdges)
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buildCyclicLivenessAnalysis(controlGraph, vrManager);
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else
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buildAcyclicLivenessAnalysis(controlGraph, vrManager);
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}
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#endif // _LIVENESS_H_
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