X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FAnalysis%2FAliasAnalysisEvaluator.cpp;h=c7a86d3506fc3e92a9dadf80409692f2aa3111a8;hb=002ec1482c83003c6aef841395271aa5993d916a;hp=df1a9b84f216653354a0087a1b6304884e002d8b;hpb=bc1dbe95b87a1931f9187597da26a1810250a40a;p=oota-llvm.git diff --git a/lib/Analysis/AliasAnalysisEvaluator.cpp b/lib/Analysis/AliasAnalysisEvaluator.cpp index df1a9b84f21..c7a86d3506f 100644 --- a/lib/Analysis/AliasAnalysisEvaluator.cpp +++ b/lib/Analysis/AliasAnalysisEvaluator.cpp @@ -1,10 +1,10 @@ //===- AliasAnalysisEvaluator.cpp - Alias Analysis Accuracy Evaluator -----===// -// +// // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. -// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// //===----------------------------------------------------------------------===// // // This file implements a simple N^2 alias analysis accuracy evaluator. @@ -17,95 +17,141 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Constants.h" +#include "llvm/DerivedTypes.h" #include "llvm/Function.h" -#include "llvm/iOther.h" -#include "llvm/iTerminators.h" +#include "llvm/Instructions.h" #include "llvm/Pass.h" -#include "llvm/Type.h" +#include "llvm/Analysis/Passes.h" #include "llvm/Analysis/AliasAnalysis.h" #include "llvm/Assembly/Writer.h" +#include "llvm/Target/TargetData.h" #include "llvm/Support/InstIterator.h" -#include "Support/CommandLine.h" +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/Compiler.h" +#include "llvm/Support/Streams.h" #include +#include using namespace llvm; -namespace { - cl::opt PrintNoAlias("print-no-aliases", cl::ReallyHidden); - cl::opt PrintMayAlias("print-may-aliases", cl::ReallyHidden); - cl::opt PrintMustAlias("print-must-aliases", cl::ReallyHidden); +static cl::opt PrintAll("print-all-alias-modref-info", cl::ReallyHidden); + +static cl::opt PrintNoAlias("print-no-aliases", cl::ReallyHidden); +static cl::opt PrintMayAlias("print-may-aliases", cl::ReallyHidden); +static cl::opt PrintMustAlias("print-must-aliases", cl::ReallyHidden); - cl::opt PrintNoModRef("print-no-modref", cl::ReallyHidden); - cl::opt PrintMod("print-mod", cl::ReallyHidden); - cl::opt PrintRef("print-ref", cl::ReallyHidden); - cl::opt PrintModRef("print-modref", cl::ReallyHidden); +static cl::opt PrintNoModRef("print-no-modref", cl::ReallyHidden); +static cl::opt PrintMod("print-mod", cl::ReallyHidden); +static cl::opt PrintRef("print-ref", cl::ReallyHidden); +static cl::opt PrintModRef("print-modref", cl::ReallyHidden); - class AAEval : public FunctionPass { +namespace { + class VISIBILITY_HIDDEN AAEval : public FunctionPass { unsigned NoAlias, MayAlias, MustAlias; unsigned NoModRef, Mod, Ref, ModRef; public: + static char ID; // Pass identification, replacement for typeid + AAEval() : FunctionPass(&ID) {} + virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired(); AU.setPreservesAll(); } - - bool doInitialization(Module &M) { - NoAlias = MayAlias = MustAlias = 0; + + bool doInitialization(Module &M) { + NoAlias = MayAlias = MustAlias = 0; NoModRef = Mod = Ref = ModRef = 0; - return false; + + if (PrintAll) { + PrintNoAlias = PrintMayAlias = PrintMustAlias = true; + PrintNoModRef = PrintMod = PrintRef = PrintModRef = true; + } + return false; } bool runOnFunction(Function &F); bool doFinalization(Module &M); }; +} + +char AAEval::ID = 0; +static RegisterPass +X("aa-eval", "Exhaustive Alias Analysis Precision Evaluator", false, true); - RegisterOpt - X("aa-eval", "Exhaustive Alias Analysis Precision Evaluator"); +FunctionPass *llvm::createAAEvalPass() { return new AAEval(); } + +static void PrintResults(const char *Msg, bool P, const Value *V1, const Value *V2, + const Module *M) { + if (P) { + std::stringstream s1, s2; + WriteAsOperand(s1, V1, true, M); + WriteAsOperand(s2, V2, true, M); + std::string o1(s1.str()), o2(s2.str()); + if (o2 < o1) + std::swap(o1, o2); + cerr << " " << Msg << ":\t" + << o1 << ", " + << o2 << "\n"; + } } -static inline void PrintResults(const char *Msg, bool P, Value *V1, Value *V2, - Module *M) { +static inline void +PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr, + Module *M) { if (P) { - std::cerr << " " << Msg << ":\t"; - WriteAsOperand(std::cerr, V1, true, true, M) << ", "; - WriteAsOperand(std::cerr, V2, true, true, M) << "\n"; + cerr << " " << Msg << ": Ptr: "; + WriteAsOperand(*cerr.stream(), Ptr, true, M); + cerr << "\t<->" << *I; } } bool AAEval::runOnFunction(Function &F) { AliasAnalysis &AA = getAnalysis(); - + + const TargetData &TD = AA.getTargetData(); + std::set Pointers; std::set CallSites; - for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I) + for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) if (isa(I->getType())) // Add all pointer arguments Pointers.insert(I); for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) { - if (isa((*I)->getType())) // Add all pointer instructions - Pointers.insert(*I); - for (User::op_iterator OI = (*I)->op_begin(); OI != (*I)->op_end(); ++OI) - if (isa((*OI)->getType())) + if (isa(I->getType())) // Add all pointer instructions + Pointers.insert(&*I); + Instruction &Inst = *I; + User::op_iterator OI = Inst.op_begin(); + if ((isa(Inst) || isa(Inst)) && + isa(Inst.getOperand(0))) + ++OI; // Skip actual functions for direct function calls. + for (; OI != Inst.op_end(); ++OI) + if (isa((*OI)->getType()) && !isa(*OI)) Pointers.insert(*OI); - } - for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) { - if (CallInst *CI = dyn_cast(*I)) - CallSites.insert(CallSite(CI)); - else if (InvokeInst *II = dyn_cast(*I)) - CallSites.insert(CallSite(II)); + CallSite CS = CallSite::get(&*I); + if (CS.getInstruction()) CallSites.insert(CS); } if (PrintNoAlias || PrintMayAlias || PrintMustAlias || PrintNoModRef || PrintMod || PrintRef || PrintModRef) - std::cerr << "Function: " << F.getName() << "\n"; + cerr << "Function: " << F.getName() << ": " << Pointers.size() + << " pointers, " << CallSites.size() << " call sites\n"; // iterate over the worklist, and run the full (n^2)/2 disambiguations for (std::set::iterator I1 = Pointers.begin(), E = Pointers.end(); - I1 != E; ++I1) - for (std::set::iterator I2 = Pointers.begin(); I2 != I1; ++I2) - switch (AA.alias(*I1, 0, *I2, 0)) { + I1 != E; ++I1) { + unsigned I1Size = 0; + const Type *I1ElTy = cast((*I1)->getType())->getElementType(); + if (I1ElTy->isSized()) I1Size = TD.getTypeStoreSize(I1ElTy); + + for (std::set::iterator I2 = Pointers.begin(); I2 != I1; ++I2) { + unsigned I2Size = 0; + const Type *I2ElTy =cast((*I2)->getType())->getElementType(); + if (I2ElTy->isSized()) I2Size = TD.getTypeStoreSize(I2ElTy); + + switch (AA.alias(*I1, I1Size, *I2, I2Size)) { case AliasAnalysis::NoAlias: PrintResults("NoAlias", PrintNoAlias, *I1, *I2, F.getParent()); ++NoAlias; break; @@ -116,71 +162,84 @@ bool AAEval::runOnFunction(Function &F) { PrintResults("MustAlias", PrintMustAlias, *I1, *I2, F.getParent()); ++MustAlias; break; default: - std::cerr << "Unknown alias query result!\n"; + cerr << "Unknown alias query result!\n"; } + } + } // Mod/ref alias analysis: compare all pairs of calls and values - for (std::set::iterator V = Pointers.begin(), Ve = Pointers.end(); - V != Ve; ++V) - for (std::set::iterator C = CallSites.begin(), - Ce = CallSites.end(); C != Ce; ++C) { - Instruction *I = C->getInstruction(); - switch (AA.getModRefInfo(*C, *V, (*V)->getType()->getPrimitiveSize())) { + for (std::set::iterator C = CallSites.begin(), + Ce = CallSites.end(); C != Ce; ++C) { + Instruction *I = C->getInstruction(); + + for (std::set::iterator V = Pointers.begin(), Ve = Pointers.end(); + V != Ve; ++V) { + unsigned Size = 0; + const Type *ElTy = cast((*V)->getType())->getElementType(); + if (ElTy->isSized()) Size = TD.getTypeStoreSize(ElTy); + + switch (AA.getModRefInfo(*C, *V, Size)) { case AliasAnalysis::NoModRef: - PrintResults("NoModRef", PrintNoModRef, I, *V, F.getParent()); + PrintModRefResults("NoModRef", PrintNoModRef, I, *V, F.getParent()); ++NoModRef; break; case AliasAnalysis::Mod: - PrintResults("Mod", PrintMod, I, *V, F.getParent()); + PrintModRefResults(" Mod", PrintMod, I, *V, F.getParent()); ++Mod; break; case AliasAnalysis::Ref: - PrintResults("Ref", PrintRef, I, *V, F.getParent()); + PrintModRefResults(" Ref", PrintRef, I, *V, F.getParent()); ++Ref; break; case AliasAnalysis::ModRef: - PrintResults("ModRef", PrintModRef, I, *V, F.getParent()); + PrintModRefResults(" ModRef", PrintModRef, I, *V, F.getParent()); ++ModRef; break; default: - std::cerr << "Unknown alias query result!\n"; + cerr << "Unknown alias query result!\n"; } } + } return false; } +static void PrintPercent(unsigned Num, unsigned Sum) { + cerr << "(" << Num*100ULL/Sum << "." + << ((Num*1000ULL/Sum) % 10) << "%)\n"; +} + bool AAEval::doFinalization(Module &M) { unsigned AliasSum = NoAlias + MayAlias + MustAlias; - std::cerr << "===== Alias Analysis Evaluator Report =====\n"; + cerr << "===== Alias Analysis Evaluator Report =====\n"; if (AliasSum == 0) { - std::cerr << " Alias Analysis Evaluator Summary: No pointers!\n"; - } else { - std::cerr << " " << AliasSum << " Total Alias Queries Performed\n"; - std::cerr << " " << NoAlias << " no alias responses (" - << NoAlias*100/AliasSum << "%)\n"; - std::cerr << " " << MayAlias << " may alias responses (" - << MayAlias*100/AliasSum << "%)\n"; - std::cerr << " " << MustAlias << " must alias responses (" - << MustAlias*100/AliasSum <<"%)\n"; - std::cerr << " Alias Analysis Evaluator Pointer Alias Summary: " - << NoAlias*100/AliasSum << "%/" << MayAlias*100/AliasSum << "%/" - << MustAlias*100/AliasSum << "%\n"; + cerr << " Alias Analysis Evaluator Summary: No pointers!\n"; + } else { + cerr << " " << AliasSum << " Total Alias Queries Performed\n"; + cerr << " " << NoAlias << " no alias responses "; + PrintPercent(NoAlias, AliasSum); + cerr << " " << MayAlias << " may alias responses "; + PrintPercent(MayAlias, AliasSum); + cerr << " " << MustAlias << " must alias responses "; + PrintPercent(MustAlias, AliasSum); + cerr << " Alias Analysis Evaluator Pointer Alias Summary: " + << NoAlias*100/AliasSum << "%/" << MayAlias*100/AliasSum << "%/" + << MustAlias*100/AliasSum << "%\n"; } // Display the summary for mod/ref analysis unsigned ModRefSum = NoModRef + Mod + Ref + ModRef; if (ModRefSum == 0) { - std::cerr << " Alias Analysis Mod/Ref Evaluator Summary: no mod/ref!\n"; + cerr << " Alias Analysis Mod/Ref Evaluator Summary: no mod/ref!\n"; } else { - std::cerr << " " << ModRefSum << " Total ModRef Queries Performed\n"; - std::cerr << " " << NoModRef << " no mod/ref responses (" - << NoModRef*100/ModRefSum << "%)\n"; - std::cerr << " " << Mod << " mod responses (" - << Mod*100/ModRefSum << "%)\n"; - std::cerr << " " << Ref << " ref responses (" - << Ref*100/ModRefSum <<"%)\n"; - std::cerr << " " << ModRef << " mod & ref responses (" - << ModRef*100/ModRefSum <<"%)\n"; - std::cerr << " Alias Analysis Evaluator Mod/Ref Summary: " - << NoModRef*100/ModRefSum << "%/" << Mod*100/ModRefSum << "%/" - << Ref*100/ModRefSum << "%/" << ModRef*100/ModRefSum << "%\n"; + cerr << " " << ModRefSum << " Total ModRef Queries Performed\n"; + cerr << " " << NoModRef << " no mod/ref responses "; + PrintPercent(NoModRef, ModRefSum); + cerr << " " << Mod << " mod responses "; + PrintPercent(Mod, ModRefSum); + cerr << " " << Ref << " ref responses "; + PrintPercent(Ref, ModRefSum); + cerr << " " << ModRef << " mod & ref responses "; + PrintPercent(ModRef, ModRefSum); + cerr << " Alias Analysis Evaluator Mod/Ref Summary: " + << NoModRef*100/ModRefSum << "%/" << Mod*100/ModRefSum << "%/" + << Ref*100/ModRefSum << "%/" << ModRef*100/ModRefSum << "%\n"; } return false;