зеркало из https://github.com/mozilla/gecko-dev.git
109 строки
2.3 KiB
C++
109 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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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// CodeGenerator.h
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//
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// Scott M. Silver
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//
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#ifndef CODEGENERATOR_H
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#define CODEGENERATOR_H
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#include "Vector.h"
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#include "CpuInfo.h"
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class Primitive;
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class ControlNode;
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class Pool;
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class DataConsumer;
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class Instruction;
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struct InstructionUse;
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#ifdef IGVISUALIZE
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class IGVisualizer;
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#endif
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struct RenumberData
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{
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int neededVisits;
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int timesVisited;
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bool renumbered;
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};
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// RootPair
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struct RootPair
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{
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Primitive* root; // root of a BURG labellable subtree
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bool isPrimary; // if this root is not reachable by any other root in
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// this ControlNode
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RenumberData data;
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};
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enum RootKind
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{
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rkNotRoot,
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rkRoot,
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rkPrimary
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};
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class CodeGenerator
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{
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protected:
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Pool& mPool;
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MdEmitter& mEmitter;
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protected:
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void label(Primitive& inPrimitive);
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void emit(Primitive* p, int goalnt);
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// roots, leaves
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void findRoots(ControlNode& inControlNode, Vector<RootPair>& outRoots);
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static RootKind isRoot(Primitive& inPrimitive);
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public:
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CodeGenerator(Pool& inPool, MdEmitter& inEmitter);
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void generate(ControlNode& inControlNode);
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// for BURG labeler
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static Primitive* consumerToPrimitive(Primitive* inPrimitive, DataConsumer* inConsumer);
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static Primitive* getExpressionLeftChild(Primitive* inPrimitive);
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static Primitive* getExpressionRightChild(Primitive* inPrimitive);
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static Instruction* instructionUseToInstruction(InstructionUse& inIUse);
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// visualization
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#ifdef IGVISUALIZE
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public:
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void visualize();
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protected:
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IGVisualizer& mVisualizer;
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#endif
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};
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#endif // CODEGENERATOR_H
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