Support in AAEvaluator to print alias queries of loads/stores with TBAA tags.
Add "evaluate-tbaa" to print alias queries of loads/stores. Alias queries
between pointers do not include TBAA tags.
Add testing case for "placement new". TBAA currently says NoAlias.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177772 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/AliasAnalysisEvaluator.cpp b/lib/Analysis/AliasAnalysisEvaluator.cpp
index e58dde3..a571463 100644
--- a/lib/Analysis/AliasAnalysisEvaluator.cpp
+++ b/lib/Analysis/AliasAnalysisEvaluator.cpp
@@ -44,6 +44,8 @@
static cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
static cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);
+static cl::opt<bool> EvalTBAA("evaluate-tbaa", cl::ReallyHidden);
+
namespace {
class AAEval : public FunctionPass {
unsigned NoAlias, MayAlias, PartialAlias, MustAlias;
@@ -123,6 +125,15 @@
}
}
+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);
@@ -133,6 +144,8 @@
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.
@@ -141,6 +154,10 @@
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 (EvalTBAA && isa<LoadInst>(&*I))
+ Loads.insert(&*I);
+ if (EvalTBAA && isa<StoreInst>(&*I))
+ Stores.insert(&*I);
Instruction &Inst = *I;
if (CallSite CS = cast<Value>(&Inst)) {
Value *Callee = CS.getCalledValue();
@@ -197,6 +214,61 @@
}
}
+ if (EvalTBAA) {
+ // 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) {