X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FAnalysis%2FAliasAnalysisEvaluator.cpp;h=fe4bd4cc21099c0280824115be33a927c92d30ea;hb=83d886db3a268b42eaac9988ee7e5f4af6c1a37e;hp=308b9e3f640dc1a150729244c8f75c6954fa4a2a;hpb=1df9859c40492511b8aa4321eb76496005d3b75b;p=oota-llvm.git diff --git a/lib/Analysis/AliasAnalysisEvaluator.cpp b/lib/Analysis/AliasAnalysisEvaluator.cpp index 308b9e3f640..fe4bd4cc210 100644 --- a/lib/Analysis/AliasAnalysisEvaluator.cpp +++ b/lib/Analysis/AliasAnalysisEvaluator.cpp @@ -17,26 +17,25 @@ // //===----------------------------------------------------------------------===// -#include "llvm/Constants.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Function.h" -#include "llvm/Instructions.h" -#include "llvm/Pass.h" #include "llvm/Analysis/Passes.h" +#include "llvm/ADT/SetVector.h" #include "llvm/Analysis/AliasAnalysis.h" -#include "llvm/Assembly/Writer.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/InstIterator.h" +#include "llvm/IR/Constants.h" +#include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/Function.h" +#include "llvm/IR/InstIterator.h" +#include "llvm/IR/Instructions.h" +#include "llvm/Pass.h" #include "llvm/Support/CommandLine.h" +#include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" -#include "llvm/ADT/SetVector.h" using namespace llvm; 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 PrintPartialAlias("print-partial-aliases", cl::ReallyHidden); static cl::opt PrintMustAlias("print-must-aliases", cl::ReallyHidden); static cl::opt PrintNoModRef("print-no-modref", cl::ReallyHidden); @@ -44,39 +43,47 @@ static cl::opt PrintMod("print-mod", cl::ReallyHidden); static cl::opt PrintRef("print-ref", cl::ReallyHidden); static cl::opt PrintModRef("print-modref", cl::ReallyHidden); +static cl::opt EvalAAMD("evaluate-aa-metadata", cl::ReallyHidden); + namespace { class AAEval : public FunctionPass { - unsigned NoAlias, MayAlias, MustAlias; + unsigned NoAlias, MayAlias, PartialAlias, MustAlias; unsigned NoModRef, Mod, Ref, ModRef; public: static char ID; // Pass identification, replacement for typeid - AAEval() : FunctionPass(&ID) {} + AAEval() : FunctionPass(ID) { + initializeAAEvalPass(*PassRegistry::getPassRegistry()); + } - virtual void getAnalysisUsage(AnalysisUsage &AU) const { + void getAnalysisUsage(AnalysisUsage &AU) const override { AU.addRequired(); AU.setPreservesAll(); } - bool doInitialization(Module &M) { - NoAlias = MayAlias = MustAlias = 0; + bool doInitialization(Module &M) override { + NoAlias = MayAlias = PartialAlias = MustAlias = 0; NoModRef = Mod = Ref = ModRef = 0; if (PrintAll) { - PrintNoAlias = PrintMayAlias = PrintMustAlias = true; + PrintNoAlias = PrintMayAlias = true; + PrintPartialAlias = PrintMustAlias = true; PrintNoModRef = PrintMod = PrintRef = PrintModRef = true; } return false; } - bool runOnFunction(Function &F); - bool doFinalization(Module &M); + bool runOnFunction(Function &F) override; + bool doFinalization(Module &M) override; }; } char AAEval::ID = 0; -static RegisterPass -X("aa-eval", "Exhaustive Alias Analysis Precision Evaluator", false, true); +INITIALIZE_PASS_BEGIN(AAEval, "aa-eval", + "Exhaustive Alias Analysis Precision Evaluator", false, true) +INITIALIZE_AG_DEPENDENCY(AliasAnalysis) +INITIALIZE_PASS_END(AAEval, "aa-eval", + "Exhaustive Alias Analysis Precision Evaluator", false, true) FunctionPass *llvm::createAAEvalPass() { return new AAEval(); } @@ -86,8 +93,8 @@ static void PrintResults(const char *Msg, bool P, const Value *V1, std::string o1, o2; { raw_string_ostream os1(o1), os2(o2); - WriteAsOperand(os1, V1, true, M); - WriteAsOperand(os2, V2, true, M); + V1->printAsOperand(os1, true, M); + V2->printAsOperand(os2, true, M); } if (o2 < o1) @@ -103,38 +110,75 @@ PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr, Module *M) { if (P) { errs() << " " << Msg << ": Ptr: "; - WriteAsOperand(errs(), Ptr, true, M); + Ptr->printAsOperand(errs(), true, M); errs() << "\t<->" << *I << '\n'; } } +static inline void +PrintModRefResults(const char *Msg, bool P, CallSite CSA, CallSite CSB, + Module *M) { + if (P) { + errs() << " " << Msg << ": " << *CSA.getInstruction() + << " <-> " << *CSB.getInstruction() << '\n'; + } +} + +static inline void +PrintLoadStoreResults(const char *Msg, bool P, const Value *V1, + const Value *V2, const Module *M) { + if (P) { + errs() << " " << Msg << ": " << *V1 + << " <-> " << *V2 << '\n'; + } +} + +static inline bool isInterestingPointer(Value *V) { + return V->getType()->isPointerTy() + && !isa(V); +} + bool AAEval::runOnFunction(Function &F) { AliasAnalysis &AA = getAnalysis(); SetVector Pointers; SetVector CallSites; + SetVector Loads; + SetVector Stores; for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) - if (I->getType()->isPointerTy()) // Add all pointer arguments + if (I->getType()->isPointerTy()) // Add all pointer arguments. Pointers.insert(I); for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) { - if (I->getType()->isPointerTy()) // Add all pointer instructions + if (I->getType()->isPointerTy()) // Add all pointer instructions. Pointers.insert(&*I); + if (EvalAAMD && isa(&*I)) + Loads.insert(&*I); + if (EvalAAMD && isa(&*I)) + Stores.insert(&*I); Instruction &Inst = *I; - User::op_iterator OI = Inst.op_begin(); - CallSite CS = CallSite::get(&Inst); - if (CS.getInstruction() && - isa(CS.getCalledValue())) - ++OI; // Skip actual functions for direct function calls. - for (; OI != Inst.op_end(); ++OI) - if ((*OI)->getType()->isPointerTy() && !isa(*OI)) - Pointers.insert(*OI); - - if (CS.getInstruction()) CallSites.insert(CS); + if (CallSite CS = cast(&Inst)) { + Value *Callee = CS.getCalledValue(); + // Skip actual functions for direct function calls. + if (!isa(Callee) && isInterestingPointer(Callee)) + Pointers.insert(Callee); + // Consider formals. + for (CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end(); + AI != AE; ++AI) + if (isInterestingPointer(*AI)) + Pointers.insert(*AI); + CallSites.insert(CS); + } else { + // Consider all operands. + for (Instruction::op_iterator OI = Inst.op_begin(), OE = Inst.op_end(); + OI != OE; ++OI) + if (isInterestingPointer(*OI)) + Pointers.insert(*OI); + } } - if (PrintNoAlias || PrintMayAlias || PrintMustAlias || + if (PrintNoAlias || PrintMayAlias || PrintPartialAlias || PrintMustAlias || PrintNoModRef || PrintMod || PrintRef || PrintModRef) errs() << "Function: " << F.getName() << ": " << Pointers.size() << " pointers, " << CallSites.size() << " call sites\n"; @@ -142,13 +186,13 @@ bool AAEval::runOnFunction(Function &F) { // iterate over the worklist, and run the full (n^2)/2 disambiguations for (SetVector::iterator I1 = Pointers.begin(), E = Pointers.end(); I1 != E; ++I1) { - unsigned I1Size = ~0u; - const Type *I1ElTy = cast((*I1)->getType())->getElementType(); + uint64_t I1Size = AliasAnalysis::UnknownSize; + Type *I1ElTy = cast((*I1)->getType())->getElementType(); if (I1ElTy->isSized()) I1Size = AA.getTypeStoreSize(I1ElTy); for (SetVector::iterator I2 = Pointers.begin(); I2 != I1; ++I2) { - unsigned I2Size = ~0u; - const Type *I2ElTy =cast((*I2)->getType())->getElementType(); + uint64_t I2Size = AliasAnalysis::UnknownSize; + Type *I2ElTy =cast((*I2)->getType())->getElementType(); if (I2ElTy->isSized()) I2Size = AA.getTypeStoreSize(I2ElTy); switch (AA.alias(*I1, I1Size, *I2, I2Size)) { @@ -158,11 +202,68 @@ bool AAEval::runOnFunction(Function &F) { case AliasAnalysis::MayAlias: PrintResults("MayAlias", PrintMayAlias, *I1, *I2, F.getParent()); ++MayAlias; break; + case AliasAnalysis::PartialAlias: + PrintResults("PartialAlias", PrintPartialAlias, *I1, *I2, + F.getParent()); + ++PartialAlias; break; case AliasAnalysis::MustAlias: PrintResults("MustAlias", PrintMustAlias, *I1, *I2, F.getParent()); ++MustAlias; break; - default: - errs() << "Unknown alias query result!\n"; + } + } + } + + if (EvalAAMD) { + // iterate over all pairs of load, store + for (SetVector::iterator I1 = Loads.begin(), E = Loads.end(); + I1 != E; ++I1) { + for (SetVector::iterator I2 = Stores.begin(), E2 = Stores.end(); + I2 != E2; ++I2) { + switch (AA.alias(AA.getLocation(cast(*I1)), + AA.getLocation(cast(*I2)))) { + case AliasAnalysis::NoAlias: + PrintLoadStoreResults("NoAlias", PrintNoAlias, *I1, *I2, + F.getParent()); + ++NoAlias; break; + case AliasAnalysis::MayAlias: + PrintLoadStoreResults("MayAlias", PrintMayAlias, *I1, *I2, + F.getParent()); + ++MayAlias; break; + case AliasAnalysis::PartialAlias: + PrintLoadStoreResults("PartialAlias", PrintPartialAlias, *I1, *I2, + F.getParent()); + ++PartialAlias; break; + case AliasAnalysis::MustAlias: + PrintLoadStoreResults("MustAlias", PrintMustAlias, *I1, *I2, + F.getParent()); + ++MustAlias; break; + } + } + } + + // iterate over all pairs of store, store + for (SetVector::iterator I1 = Stores.begin(), E = Stores.end(); + I1 != E; ++I1) { + for (SetVector::iterator I2 = Stores.begin(); I2 != I1; ++I2) { + switch (AA.alias(AA.getLocation(cast(*I1)), + AA.getLocation(cast(*I2)))) { + case AliasAnalysis::NoAlias: + PrintLoadStoreResults("NoAlias", PrintNoAlias, *I1, *I2, + F.getParent()); + ++NoAlias; break; + case AliasAnalysis::MayAlias: + PrintLoadStoreResults("MayAlias", PrintMayAlias, *I1, *I2, + F.getParent()); + ++MayAlias; break; + case AliasAnalysis::PartialAlias: + PrintLoadStoreResults("PartialAlias", PrintPartialAlias, *I1, *I2, + F.getParent()); + ++PartialAlias; break; + case AliasAnalysis::MustAlias: + PrintLoadStoreResults("MustAlias", PrintMustAlias, *I1, *I2, + F.getParent()); + ++MustAlias; break; + } } } } @@ -174,8 +275,8 @@ bool AAEval::runOnFunction(Function &F) { for (SetVector::iterator V = Pointers.begin(), Ve = Pointers.end(); V != Ve; ++V) { - unsigned Size = ~0u; - const Type *ElTy = cast((*V)->getType())->getElementType(); + uint64_t Size = AliasAnalysis::UnknownSize; + Type *ElTy = cast((*V)->getType())->getElementType(); if (ElTy->isSized()) Size = AA.getTypeStoreSize(ElTy); switch (AA.getModRefInfo(*C, *V, Size)) { @@ -183,16 +284,37 @@ bool AAEval::runOnFunction(Function &F) { PrintModRefResults("NoModRef", PrintNoModRef, I, *V, F.getParent()); ++NoModRef; break; case AliasAnalysis::Mod: - PrintModRefResults(" Mod", PrintMod, I, *V, F.getParent()); + PrintModRefResults("Just Mod", PrintMod, I, *V, F.getParent()); + ++Mod; break; + case AliasAnalysis::Ref: + PrintModRefResults("Just Ref", PrintRef, I, *V, F.getParent()); + ++Ref; break; + case AliasAnalysis::ModRef: + PrintModRefResults("Both ModRef", PrintModRef, I, *V, F.getParent()); + ++ModRef; break; + } + } + } + + // Mod/ref alias analysis: compare all pairs of calls + for (SetVector::iterator C = CallSites.begin(), + Ce = CallSites.end(); C != Ce; ++C) { + for (SetVector::iterator D = CallSites.begin(); D != Ce; ++D) { + if (D == C) + continue; + switch (AA.getModRefInfo(*C, *D)) { + case AliasAnalysis::NoModRef: + PrintModRefResults("NoModRef", PrintNoModRef, *C, *D, F.getParent()); + ++NoModRef; break; + case AliasAnalysis::Mod: + PrintModRefResults("Just Mod", PrintMod, *C, *D, F.getParent()); ++Mod; break; case AliasAnalysis::Ref: - PrintModRefResults(" Ref", PrintRef, I, *V, F.getParent()); + PrintModRefResults("Just Ref", PrintRef, *C, *D, F.getParent()); ++Ref; break; case AliasAnalysis::ModRef: - PrintModRefResults(" ModRef", PrintModRef, I, *V, F.getParent()); + PrintModRefResults("Both ModRef", PrintModRef, *C, *D, F.getParent()); ++ModRef; break; - default: - errs() << "Unknown alias query result!\n"; } } } @@ -206,7 +328,7 @@ static void PrintPercent(unsigned Num, unsigned Sum) { } bool AAEval::doFinalization(Module &M) { - unsigned AliasSum = NoAlias + MayAlias + MustAlias; + unsigned AliasSum = NoAlias + MayAlias + PartialAlias + MustAlias; errs() << "===== Alias Analysis Evaluator Report =====\n"; if (AliasSum == 0) { errs() << " Alias Analysis Evaluator Summary: No pointers!\n"; @@ -216,10 +338,13 @@ bool AAEval::doFinalization(Module &M) { PrintPercent(NoAlias, AliasSum); errs() << " " << MayAlias << " may alias responses "; PrintPercent(MayAlias, AliasSum); + errs() << " " << PartialAlias << " partial alias responses "; + PrintPercent(PartialAlias, AliasSum); errs() << " " << MustAlias << " must alias responses "; PrintPercent(MustAlias, AliasSum); errs() << " Alias Analysis Evaluator Pointer Alias Summary: " << NoAlias*100/AliasSum << "%/" << MayAlias*100/AliasSum << "%/" + << PartialAlias*100/AliasSum << "%/" << MustAlias*100/AliasSum << "%\n"; }