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93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
//===-- DependenceAnalyzer.h - Dependence Analyzer--------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_DEPENDENCEANALYZER_H
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#define LLVM_DEPENDENCEANALYZER_H
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#include "llvm/Instructions.h"
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#include "llvm/Function.h"
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#include "llvm/Pass.h"
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Analysis/ScalarEvolutionExpressions.h"
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#include "llvm/Target/TargetData.h"
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#include <vector>
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namespace llvm {
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//class to represent a dependence
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struct Dependence {
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enum DataDepType {
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TrueDep, AntiDep, OutputDep, NonDateDep,
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};
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Dependence(int diff, DataDepType dep) : iteDiff(diff), depType(dep) {}
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unsigned getIteDiff() { return iteDiff; }
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unsigned getDepType() { return depType; }
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private:
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unsigned iteDiff;
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unsigned depType;
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};
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struct DependenceResult {
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std::vector<Dependence> dependences;
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DependenceResult(const std::vector<Dependence> &d) : dependences(d) {}
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};
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class DependenceAnalyzer : public FunctionPass {
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AliasAnalysis *AA;
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TargetData *TD;
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ScalarEvolution *SE;
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void advancedDepAnalysis(GetElementPtrInst *gp1, GetElementPtrInst *gp2,
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bool valLoad, bool val2Load,
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std::vector<Dependence> &deps, bool srcBeforeDest);
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void AnalyzeDeps(Value *val, Value *val2, bool val1Load, bool val2Load,
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std::vector<Dependence> &deps, BasicBlock *BB,
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bool srcBeforeDest);
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void createDep(std::vector<Dependence> &deps, bool valLoad, bool val2Load,
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bool srcBeforeDest, int diff = 0);
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public:
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DependenceAnalyzer() { AA = 0; TD = 0; SE = 0; }
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virtual bool runOnFunction(Function &F);
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virtual const char* getPassName() const { return "DependenceAnalyzer"; }
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// getAnalysisUsage
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<AliasAnalysis>();
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AU.addRequired<TargetData>();
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AU.addRequired<ScalarEvolution>();
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AU.setPreservesAll();
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}
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//get dependence info
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DependenceResult getDependenceInfo(Instruction *inst1, Instruction *inst2,
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bool srcBeforeDest);
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};
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}
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#endif
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