Make this more efficient by only making one virtual method call.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20793 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/AliasAnalysis.cpp b/lib/Analysis/AliasAnalysis.cpp
index da54c1b..5236435 100644
--- a/lib/Analysis/AliasAnalysis.cpp
+++ b/lib/Analysis/AliasAnalysis.cpp
@@ -114,11 +114,13 @@
AliasAnalysis::ModRefResult
AliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
ModRefResult Mask = ModRef;
- if (Function *F = CS.getCalledFunction())
- if (onlyReadsMemory(F)) {
- if (doesNotAccessMemory(F)) return NoModRef;
+ if (Function *F = CS.getCalledFunction()) {
+ ModRefBehavior MRB = getModRefBehavior(F, CallSite());
+ if (MRB == OnlyReadsMemory)
Mask = Ref;
- }
+ else if (MRB == DoesNotAccessMemory)
+ return NoModRef;
+ }
if (!AA) return Mask;