//
// 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
-#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/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/Streams.h"
-#include <set>
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
-namespace {
- cl::opt<bool> PrintAll("print-all-alias-modref-info", cl::ReallyHidden);
+static cl::opt<bool> PrintAll("print-all-alias-modref-info", cl::ReallyHidden);
- cl::opt<bool> PrintNoAlias("print-no-aliases", cl::ReallyHidden);
- cl::opt<bool> PrintMayAlias("print-may-aliases", cl::ReallyHidden);
- cl::opt<bool> PrintMustAlias("print-must-aliases", cl::ReallyHidden);
+static cl::opt<bool> PrintNoAlias("print-no-aliases", cl::ReallyHidden);
+static cl::opt<bool> PrintMayAlias("print-may-aliases", cl::ReallyHidden);
+static cl::opt<bool> PrintPartialAlias("print-partial-aliases", cl::ReallyHidden);
+static cl::opt<bool> PrintMustAlias("print-must-aliases", cl::ReallyHidden);
- cl::opt<bool> PrintNoModRef("print-no-modref", cl::ReallyHidden);
- cl::opt<bool> PrintMod("print-mod", cl::ReallyHidden);
- cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
- cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);
+static cl::opt<bool> PrintNoModRef("print-no-modref", cl::ReallyHidden);
+static cl::opt<bool> PrintMod("print-mod", cl::ReallyHidden);
+static cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
+static cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);
+static cl::opt<bool> EvalAAMD("evaluate-aa-metadata", cl::ReallyHidden);
+
+namespace {
class AAEval : public FunctionPass {
- unsigned NoAlias, MayAlias, MustAlias;
- unsigned NoModRef, Mod, Ref, ModRef;
+ unsigned NoAliasCount, MayAliasCount, PartialAliasCount, MustAliasCount;
+ unsigned NoModRefCount, ModCount, RefCount, ModRefCount;
public:
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ static char ID; // Pass identification, replacement for typeid
+ AAEval() : FunctionPass(ID) {
+ initializeAAEvalPass(*PassRegistry::getPassRegistry());
+ }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<AliasAnalysis>();
AU.setPreservesAll();
}
- bool doInitialization(Module &M) {
- NoAlias = MayAlias = MustAlias = 0;
- NoModRef = Mod = Ref = ModRef = 0;
+ bool doInitialization(Module &M) override {
+ NoAliasCount = MayAliasCount = PartialAliasCount = MustAliasCount = 0;
+ NoModRefCount = ModCount = RefCount = ModRefCount = 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;
};
+} // namespace
- RegisterPass<AAEval>
- X("aa-eval", "Exhaustive Alias Analysis Precision Evaluator");
-}
+char AAEval::ID = 0;
+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(); }
-static inline void PrintResults(const char *Msg, bool P, Value *V1, Value *V2,
- Module *M) {
+static void PrintResults(const char *Msg, bool P, const Value *V1,
+ const Value *V2, const Module *M) {
if (P) {
- cerr << " " << Msg << ":\t";
- WriteAsOperand(*cerr.stream(), V1, true, M) << ", ";
- WriteAsOperand(*cerr.stream(), V2, true, M) << "\n";
+ std::string o1, o2;
+ {
+ raw_string_ostream os1(o1), os2(o2);
+ V1->printAsOperand(os1, true, M);
+ V2->printAsOperand(os2, true, M);
+ }
+
+ if (o2 < o1)
+ std::swap(o1, o2);
+ errs() << " " << Msg << ":\t"
+ << o1 << ", "
+ << o2 << "\n";
}
}
PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr,
Module *M) {
if (P) {
- cerr << " " << Msg << ": Ptr: ";
- WriteAsOperand(*cerr.stream(), Ptr, true, M);
- cerr << "\t<->" << *I;
+ errs() << " " << Msg << ": Ptr: ";
+ 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<ConstantPointerNull>(V);
+}
+
bool AAEval::runOnFunction(Function &F) {
AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
- const TargetData &TD = AA.getTargetData();
-
- std::set<Value *> Pointers;
- std::set<CallSite> CallSites;
+ SetVector<Value *> Pointers;
+ SetVector<CallSite> CallSites;
+ SetVector<Value *> Loads;
+ SetVector<Value *> Stores;
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I)
- if (isa<PointerType>(I->getType())) // 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 (isa<PointerType>(I->getType())) // Add all pointer instructions
+ if (I->getType()->isPointerTy()) // Add all pointer instructions.
Pointers.insert(&*I);
+ if (EvalAAMD && isa<LoadInst>(&*I))
+ Loads.insert(&*I);
+ if (EvalAAMD && isa<StoreInst>(&*I))
+ Stores.insert(&*I);
Instruction &Inst = *I;
- User::op_iterator OI = Inst.op_begin();
- if ((isa<InvokeInst>(Inst) || isa<CallInst>(Inst)) &&
- isa<Function>(Inst.getOperand(0)))
- ++OI; // Skip actual functions for direct function calls.
- for (; OI != Inst.op_end(); ++OI)
- if (isa<PointerType>((*OI)->getType()) && !isa<ConstantPointerNull>(*OI))
- Pointers.insert(*OI);
-
- CallSite CS = CallSite::get(&*I);
- if (CS.getInstruction()) CallSites.insert(CS);
+ if (auto CS = CallSite(&Inst)) {
+ Value *Callee = CS.getCalledValue();
+ // Skip actual functions for direct function calls.
+ if (!isa<Function>(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)
- cerr << "Function: " << F.getName() << ": " << Pointers.size()
- << " pointers, " << CallSites.size() << " call sites\n";
+ errs() << "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<Value *>::iterator I1 = Pointers.begin(), E = Pointers.end();
+ for (SetVector<Value *>::iterator I1 = Pointers.begin(), E = Pointers.end();
I1 != E; ++I1) {
- unsigned I1Size = 0;
-
const Type *I1ElTy = cast<PointerType>((*I1)->getType())->getElementType();
- if (I1ElTy->isSized()) I1Size = TD.getTypeSize(I1ElTy);
+ uint64_t I1Size = MemoryLocation::UnknownSize;
+ Type *I1ElTy = cast<PointerType>((*I1)->getType())->getElementType();
+ if (I1ElTy->isSized()) I1Size = AA.getTypeStoreSize(I1ElTy);
- for (std::set<Value *>::iterator I2 = Pointers.begin(); I2 != I1; ++I2) {
- unsigned I2Size = 0;
-
const Type *I2ElTy =cast<PointerType>((*I2)->getType())->getElementType();
- if (I2ElTy->isSized()) I2Size = TD.getTypeSize(I2ElTy);
+ for (SetVector<Value *>::iterator I2 = Pointers.begin(); I2 != I1; ++I2) {
+ uint64_t I2Size = MemoryLocation::UnknownSize;
+ Type *I2ElTy =cast<PointerType>((*I2)->getType())->getElementType();
+ if (I2ElTy->isSized()) I2Size = AA.getTypeStoreSize(I2ElTy);
switch (AA.alias(*I1, I1Size, *I2, I2Size)) {
- case AliasAnalysis::NoAlias:
+ case NoAlias:
PrintResults("NoAlias", PrintNoAlias, *I1, *I2, F.getParent());
- ++NoAlias; break;
- case AliasAnalysis::MayAlias:
+ ++NoAliasCount;
+ break;
+ case MayAlias:
PrintResults("MayAlias", PrintMayAlias, *I1, *I2, F.getParent());
- ++MayAlias; break;
- case AliasAnalysis::MustAlias:
+ ++MayAliasCount;
+ break;
+ case PartialAlias:
+ PrintResults("PartialAlias", PrintPartialAlias, *I1, *I2,
+ F.getParent());
+ ++PartialAliasCount;
+ break;
+ case MustAlias:
PrintResults("MustAlias", PrintMustAlias, *I1, *I2, F.getParent());
- ++MustAlias; break;
- default:
- cerr << "Unknown alias query result!\n";
+ ++MustAliasCount;
+ break;
+ }
+ }
+ }
+
+ if (EvalAAMD) {
+ // iterate over all pairs of load, store
+ for (SetVector<Value *>::iterator I1 = Loads.begin(), E = Loads.end();
+ I1 != E; ++I1) {
+ for (SetVector<Value *>::iterator I2 = Stores.begin(), E2 = Stores.end();
+ I2 != E2; ++I2) {
+ switch (AA.alias(MemoryLocation::get(cast<LoadInst>(*I1)),
+ MemoryLocation::get(cast<StoreInst>(*I2)))) {
+ case NoAlias:
+ PrintLoadStoreResults("NoAlias", PrintNoAlias, *I1, *I2,
+ F.getParent());
+ ++NoAliasCount;
+ break;
+ case MayAlias:
+ PrintLoadStoreResults("MayAlias", PrintMayAlias, *I1, *I2,
+ F.getParent());
+ ++MayAliasCount;
+ break;
+ case PartialAlias:
+ PrintLoadStoreResults("PartialAlias", PrintPartialAlias, *I1, *I2,
+ F.getParent());
+ ++PartialAliasCount;
+ break;
+ case MustAlias:
+ PrintLoadStoreResults("MustAlias", PrintMustAlias, *I1, *I2,
+ F.getParent());
+ ++MustAliasCount;
+ break;
+ }
+ }
+ }
+
+ // iterate over all pairs of store, store
+ for (SetVector<Value *>::iterator I1 = Stores.begin(), E = Stores.end();
+ I1 != E; ++I1) {
+ for (SetVector<Value *>::iterator I2 = Stores.begin(); I2 != I1; ++I2) {
+ switch (AA.alias(MemoryLocation::get(cast<StoreInst>(*I1)),
+ MemoryLocation::get(cast<StoreInst>(*I2)))) {
+ case NoAlias:
+ PrintLoadStoreResults("NoAlias", PrintNoAlias, *I1, *I2,
+ F.getParent());
+ ++NoAliasCount;
+ break;
+ case MayAlias:
+ PrintLoadStoreResults("MayAlias", PrintMayAlias, *I1, *I2,
+ F.getParent());
+ ++MayAliasCount;
+ break;
+ case PartialAlias:
+ PrintLoadStoreResults("PartialAlias", PrintPartialAlias, *I1, *I2,
+ F.getParent());
+ ++PartialAliasCount;
+ break;
+ case MustAlias:
+ PrintLoadStoreResults("MustAlias", PrintMustAlias, *I1, *I2,
+ F.getParent());
+ ++MustAliasCount;
+ break;
+ }
}
}
}
// Mod/ref alias analysis: compare all pairs of calls and values
- for (std::set<CallSite>::iterator C = CallSites.begin(),
+ for (SetVector<CallSite>::iterator C = CallSites.begin(),
Ce = CallSites.end(); C != Ce; ++C) {
Instruction *I = C->getInstruction();
- for (std::set<Value *>::iterator V = Pointers.begin(), Ve = Pointers.end();
+ for (SetVector<Value *>::iterator V = Pointers.begin(), Ve = Pointers.end();
V != Ve; ++V) {
- unsigned Size = 0;
-
const Type *ElTy = cast<PointerType>((*V)->getType())->getElementType();
- if (ElTy->isSized()) Size = TD.getTypeSize(ElTy);
+ uint64_t Size = MemoryLocation::UnknownSize;
+ Type *ElTy = cast<PointerType>((*V)->getType())->getElementType();
+ if (ElTy->isSized()) Size = AA.getTypeStoreSize(ElTy);
switch (AA.getModRefInfo(*C, *V, Size)) {
case AliasAnalysis::NoModRef:
PrintModRefResults("NoModRef", PrintNoModRef, I, *V, F.getParent());
- ++NoModRef; break;
+ ++NoModRefCount;
+ break;
+ case AliasAnalysis::Mod:
+ PrintModRefResults("Just Mod", PrintMod, I, *V, F.getParent());
+ ++ModCount;
+ break;
+ case AliasAnalysis::Ref:
+ PrintModRefResults("Just Ref", PrintRef, I, *V, F.getParent());
+ ++RefCount;
+ break;
+ case AliasAnalysis::ModRef:
+ PrintModRefResults("Both ModRef", PrintModRef, I, *V, F.getParent());
+ ++ModRefCount;
+ break;
+ }
+ }
+ }
+
+ // Mod/ref alias analysis: compare all pairs of calls
+ for (SetVector<CallSite>::iterator C = CallSites.begin(),
+ Ce = CallSites.end(); C != Ce; ++C) {
+ for (SetVector<CallSite>::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());
+ ++NoModRefCount;
+ break;
case AliasAnalysis::Mod:
- PrintModRefResults(" Mod", PrintMod, I, *V, F.getParent());
- ++Mod; break;
+ PrintModRefResults("Just Mod", PrintMod, *C, *D, F.getParent());
+ ++ModCount;
+ break;
case AliasAnalysis::Ref:
- PrintModRefResults(" Ref", PrintRef, I, *V, F.getParent());
- ++Ref; break;
+ PrintModRefResults("Just Ref", PrintRef, *C, *D, F.getParent());
+ ++RefCount;
+ break;
case AliasAnalysis::ModRef:
- PrintModRefResults(" ModRef", PrintModRef, I, *V, F.getParent());
- ++ModRef; break;
- default:
- cerr << "Unknown alias query result!\n";
+ PrintModRefResults("Both ModRef", PrintModRef, *C, *D, F.getParent());
+ ++ModRefCount;
+ break;
}
}
}
}
static void PrintPercent(unsigned Num, unsigned Sum) {
- cerr << "(" << Num*100ULL/Sum << "."
- << ((Num*1000ULL/Sum) % 10) << "%)\n";
+ errs() << "(" << Num*100ULL/Sum << "."
+ << ((Num*1000ULL/Sum) % 10) << "%)\n";
}
bool AAEval::doFinalization(Module &M) {
- unsigned AliasSum = NoAlias + MayAlias + MustAlias;
- cerr << "===== Alias Analysis Evaluator Report =====\n";
+ unsigned AliasSum =
+ NoAliasCount + MayAliasCount + PartialAliasCount + MustAliasCount;
+ errs() << "===== Alias Analysis Evaluator Report =====\n";
if (AliasSum == 0) {
- cerr << " Alias Analysis Evaluator Summary: No pointers!\n";
+ errs() << " 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";
+ errs() << " " << AliasSum << " Total Alias Queries Performed\n";
+ errs() << " " << NoAliasCount << " no alias responses ";
+ PrintPercent(NoAliasCount, AliasSum);
+ errs() << " " << MayAliasCount << " may alias responses ";
+ PrintPercent(MayAliasCount, AliasSum);
+ errs() << " " << PartialAliasCount << " partial alias responses ";
+ PrintPercent(PartialAliasCount, AliasSum);
+ errs() << " " << MustAliasCount << " must alias responses ";
+ PrintPercent(MustAliasCount, AliasSum);
+ errs() << " Alias Analysis Evaluator Pointer Alias Summary: "
+ << NoAliasCount * 100 / AliasSum << "%/"
+ << MayAliasCount * 100 / AliasSum << "%/"
+ << PartialAliasCount * 100 / AliasSum << "%/"
+ << MustAliasCount * 100 / AliasSum << "%\n";
}
// Display the summary for mod/ref analysis
- unsigned ModRefSum = NoModRef + Mod + Ref + ModRef;
+ unsigned ModRefSum = NoModRefCount + ModCount + RefCount + ModRefCount;
if (ModRefSum == 0) {
- cerr << " Alias Analysis Mod/Ref Evaluator Summary: no mod/ref!\n";
+ errs() << " Alias Analysis Mod/Ref Evaluator Summary: no "
+ "mod/ref!\n";
} else {
- 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";
+ errs() << " " << ModRefSum << " Total ModRef Queries Performed\n";
+ errs() << " " << NoModRefCount << " no mod/ref responses ";
+ PrintPercent(NoModRefCount, ModRefSum);
+ errs() << " " << ModCount << " mod responses ";
+ PrintPercent(ModCount, ModRefSum);
+ errs() << " " << RefCount << " ref responses ";
+ PrintPercent(RefCount, ModRefSum);
+ errs() << " " << ModRefCount << " mod & ref responses ";
+ PrintPercent(ModRefCount, ModRefSum);
+ errs() << " Alias Analysis Evaluator Mod/Ref Summary: "
+ << NoModRefCount * 100 / ModRefSum << "%/"
+ << ModCount * 100 / ModRefSum << "%/" << RefCount * 100 / ModRefSum
+ << "%/" << ModRefCount * 100 / ModRefSum << "%\n";
}
return false;
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