The two-callsite form of AliasAnalysis::getModRefInfo is documented
to return Ref if the left callsite only reads memory read or written
by the right callsite; fix BasicAliasAnalysis to implement this.
Add AliasAnalysisEvaluator support for testing the two-callsite
form of getModRefInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110270 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/AliasAnalysisEvaluator.cpp b/lib/Analysis/AliasAnalysisEvaluator.cpp
index 9ecdf57..a22f63a 100644
--- a/lib/Analysis/AliasAnalysisEvaluator.cpp
+++ b/lib/Analysis/AliasAnalysisEvaluator.cpp
@@ -107,6 +107,15 @@
}
}
+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 bool isInterestingPointer(Value *V) {
return V->getType()->isPointerTy()
&& !isa<ConstantPointerNull>(V);
@@ -209,6 +218,29 @@
}
}
+ // 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());
+ ++NoModRef; break;
+ case AliasAnalysis::Mod:
+ PrintModRefResults(" Mod", PrintMod, *C, *D, F.getParent());
+ ++Mod; break;
+ case AliasAnalysis::Ref:
+ PrintModRefResults(" Ref", PrintRef, *C, *D, F.getParent());
+ ++Ref; break;
+ case AliasAnalysis::ModRef:
+ PrintModRefResults(" ModRef", PrintModRef, *C, *D, F.getParent());
+ ++ModRef; break;
+ }
+ }
+ }
+
return false;
}