X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FAnalysis%2FAliasAnalysisCounter.cpp;h=b8609142fa20416e8183048b97b6dd1e0a347d66;hb=12af22e8cc217827cf4f118b0f5e4ebbda9925ae;hp=6bad8cdfc52eb9897118d917877ed8ca5aaaf002;hpb=381bf79ae17a77fedb902b87aea7e55be9b793aa;p=oota-llvm.git diff --git a/lib/Analysis/AliasAnalysisCounter.cpp b/lib/Analysis/AliasAnalysisCounter.cpp index 6bad8cdfc52..b8609142fa2 100644 --- a/lib/Analysis/AliasAnalysisCounter.cpp +++ b/lib/Analysis/AliasAnalysisCounter.cpp @@ -1,10 +1,10 @@ //===- AliasAnalysisCounter.cpp - Alias Analysis Query Counter ------------===// -// +// // 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 pass which can be used to count how many alias queries @@ -12,100 +12,159 @@ // //===----------------------------------------------------------------------===// +#include "llvm/Analysis/Passes.h" #include "llvm/Analysis/AliasAnalysis.h" #include "llvm/Pass.h" -#include +#include "llvm/Support/CommandLine.h" +#include "llvm/Support/Debug.h" +#include "llvm/Support/ErrorHandling.h" +#include "llvm/Support/raw_ostream.h" using namespace llvm; +static cl::opt +PrintAll("count-aa-print-all-queries", cl::ReallyHidden, cl::init(true)); +static cl::opt +PrintAllFailures("count-aa-print-all-failed-queries", cl::ReallyHidden); + namespace { - class AliasAnalysisCounter : public Pass, public AliasAnalysis { - unsigned No, May, Must; + class AliasAnalysisCounter : public ModulePass, public AliasAnalysis { + unsigned No, May, Partial, Must; unsigned NoMR, JustRef, JustMod, MR; - const char *Name; + Module *M; public: - AliasAnalysisCounter() { - No = May = Must = 0; + static char ID; // Class identification, replacement for typeinfo + AliasAnalysisCounter() : ModulePass(ID) { + initializeAliasAnalysisCounterPass(*PassRegistry::getPassRegistry()); + No = May = Partial = Must = 0; NoMR = JustRef = JustMod = MR = 0; } void printLine(const char *Desc, unsigned Val, unsigned Sum) { - std::cerr << " " << Val << " " << Desc << " responses (" - << Val*100/Sum << "%)\n"; + errs() << " " << Val << " " << Desc << " responses (" + << Val*100/Sum << "%)\n"; } ~AliasAnalysisCounter() { - unsigned AASum = No+May+Must; + unsigned AASum = No+May+Partial+Must; unsigned MRSum = NoMR+JustRef+JustMod+MR; if (AASum + MRSum) { // Print a report if any counted queries occurred... - std::cerr - << "\n===== Alias Analysis Counter Report =====\n" - << " Analysis counted: " << Name << "\n" - << " " << AASum << " Total Alias Queries Performed\n"; + errs() << "\n===== Alias Analysis Counter Report =====\n" + << " Analysis counted:\n" + << " " << AASum << " Total Alias Queries Performed\n"; if (AASum) { printLine("no alias", No, AASum); printLine("may alias", May, AASum); + printLine("partial alias", Partial, AASum); printLine("must alias", Must, AASum); - std::cerr - << " Alias Analysis Counter Summary: " << No*100/AASum << "%/" - << May*100/AASum << "%/" << Must*100/AASum<<"%\n\n"; + errs() << " Alias Analysis Counter Summary: " << No*100/AASum << "%/" + << May*100/AASum << "%/" + << Partial*100/AASum << "%/" + << Must*100/AASum<<"%\n\n"; } - std::cerr - << " " << MRSum << " Total Mod/Ref Queries Performed\n"; + errs() << " " << MRSum << " Total Mod/Ref Queries Performed\n"; if (MRSum) { printLine("no mod/ref", NoMR, MRSum); printLine("ref", JustRef, MRSum); printLine("mod", JustMod, MRSum); printLine("mod/ref", MR, MRSum); - std::cerr - << " Mod/Ref Analysis Counter Summary: " << NoMR*100/MRSum<< "%/" - << JustRef*100/MRSum << "%/" << JustMod*100/MRSum << "%/" - << MR*100/MRSum <<"%\n\n"; + errs() << " Mod/Ref Analysis Counter Summary: " <M = &M; InitializeAliasAnalysis(this); - Name = dynamic_cast(&getAnalysis())->getPassName(); return false; } - virtual void getAnalysisUsage(AnalysisUsage &AU) const { + void getAnalysisUsage(AnalysisUsage &AU) const override { AliasAnalysis::getAnalysisUsage(AU); AU.addRequired(); AU.setPreservesAll(); } - AliasResult count(AliasResult R) { - switch (R) { - default: assert(0 && "Unknown alias type!"); - case NoAlias: No++; return NoAlias; - case MayAlias: May++; return MayAlias; - case MustAlias: Must++; return MustAlias; - } - } - ModRefResult count(ModRefResult R) { - switch (R) { - default: assert(0 && "Unknown mod/ref type!"); - case NoModRef: NoMR++; return NoModRef; - case Ref: JustRef++; return Ref; - case Mod: JustMod++; return Mod; - case ModRef: MR++; return ModRef; - } + /// getAdjustedAnalysisPointer - This method is used when a pass implements + /// an analysis interface through multiple inheritance. If needed, it + /// should override this to adjust the this pointer as needed for the + /// specified pass info. + void *getAdjustedAnalysisPointer(AnalysisID PI) override { + if (PI == &AliasAnalysis::ID) + return (AliasAnalysis*)this; + return this; } + // FIXME: We could count these too... + bool pointsToConstantMemory(const Location &Loc, bool OrLocal) override { + return getAnalysis().pointsToConstantMemory(Loc, OrLocal); + } + // Forwarding functions: just delegate to a real AA implementation, counting // the number of responses... - AliasResult alias(const Value *V1, unsigned V1Size, - const Value *V2, unsigned V2Size) { - return count(getAnalysis().alias(V1, V1Size, V2, V2Size)); - } - ModRefResult getModRefInfo(CallSite CS, Value *P, unsigned Size) { - return count(getAnalysis().getModRefInfo(CS, P, Size)); + AliasResult alias(const Location &LocA, const Location &LocB) override; + + ModRefResult getModRefInfo(ImmutableCallSite CS, + const Location &Loc) override; + ModRefResult getModRefInfo(ImmutableCallSite CS1, + ImmutableCallSite CS2) override { + return AliasAnalysis::getModRefInfo(CS1,CS2); } }; +} + +char AliasAnalysisCounter::ID = 0; +INITIALIZE_AG_PASS(AliasAnalysisCounter, AliasAnalysis, "count-aa", + "Count Alias Analysis Query Responses", false, true, false) + +ModulePass *llvm::createAliasAnalysisCounterPass() { + return new AliasAnalysisCounter(); +} + +AliasAnalysis::AliasResult +AliasAnalysisCounter::alias(const Location &LocA, const Location &LocB) { + AliasResult R = getAnalysis().alias(LocA, LocB); + + const char *AliasString = nullptr; + switch (R) { + case NoAlias: No++; AliasString = "No alias"; break; + case MayAlias: May++; AliasString = "May alias"; break; + case PartialAlias: Partial++; AliasString = "Partial alias"; break; + case MustAlias: Must++; AliasString = "Must alias"; break; + } + + if (PrintAll || (PrintAllFailures && R == MayAlias)) { + errs() << AliasString << ":\t"; + errs() << "[" << LocA.Size << "B] "; + LocA.Ptr->printAsOperand(errs(), true, M); + errs() << ", "; + errs() << "[" << LocB.Size << "B] "; + LocB.Ptr->printAsOperand(errs(), true, M); + errs() << "\n"; + } + + return R; +} + +AliasAnalysis::ModRefResult +AliasAnalysisCounter::getModRefInfo(ImmutableCallSite CS, + const Location &Loc) { + ModRefResult R = getAnalysis().getModRefInfo(CS, Loc); + + const char *MRString = nullptr; + switch (R) { + case NoModRef: NoMR++; MRString = "NoModRef"; break; + case Ref: JustRef++; MRString = "JustRef"; break; + case Mod: JustMod++; MRString = "JustMod"; break; + case ModRef: MR++; MRString = "ModRef"; break; + } - RegisterOpt - X("count-aa", "Count Alias Analysis Query Responses"); - RegisterAnalysisGroup Y; + if (PrintAll || (PrintAllFailures && R == ModRef)) { + errs() << MRString << ": Ptr: "; + errs() << "[" << Loc.Size << "B] "; + Loc.Ptr->printAsOperand(errs(), true, M); + errs() << "\t<->" << *CS.getInstruction() << '\n'; + } + return R; }