#include "llvm/Analysis/Passes.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Assembly/Writer.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/InstIterator.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
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, PartialAlias, MustAlias;
initializeAAEvalPass(*PassRegistry::getPassRegistry());
}
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.addRequired<AliasAnalysis>();
AU.setPreservesAll();
}
- bool doInitialization(Module &M) {
+ bool doInitialization(Module &M) override {
NoAlias = MayAlias = PartialAlias = MustAlias = 0;
NoModRef = Mod = Ref = ModRef = 0;
return false;
}
- bool runOnFunction(Function &F);
- bool doFinalization(Module &M);
+ bool runOnFunction(Function &F) override;
+ bool doFinalization(Module &M) override;
};
}
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)
Module *M) {
if (P) {
errs() << " " << Msg << ": Ptr: ";
- WriteAsOperand(errs(), Ptr, true, M);
+ Ptr->printAsOperand(errs(), true, M);
errs() << "\t<->" << *I << '\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);
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 (I->getType()->isPointerTy()) // Add all pointer arguments.
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
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;
if (CallSite CS = cast<Value>(&Inst)) {
Value *Callee = CS.getCalledValue();
}
}
+ 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(AA.getLocation(cast<LoadInst>(*I1)),
+ AA.getLocation(cast<StoreInst>(*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<Value *>::iterator I1 = Stores.begin(), E = Stores.end();
+ I1 != E; ++I1) {
+ for (SetVector<Value *>::iterator I2 = Stores.begin(); I2 != I1; ++I2) {
+ switch (AA.alias(AA.getLocation(cast<StoreInst>(*I1)),
+ AA.getLocation(cast<StoreInst>(*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;
+ }
+ }
+ }
+ }
+
// Mod/ref alias analysis: compare all pairs of calls and values
for (SetVector<CallSite>::iterator C = CallSites.begin(),
Ce = CallSites.end(); C != Ce; ++C) {