check for the NoAlias attribute through CallSite
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159145 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/MemoryBuiltins.cpp b/lib/Analysis/MemoryBuiltins.cpp
index a9f1244..6b21b73 100644
--- a/lib/Analysis/MemoryBuiltins.cpp
+++ b/lib/Analysis/MemoryBuiltins.cpp
@@ -118,8 +118,8 @@
}
static bool hasNoAliasAttr(const Value *V, bool LookThroughBitCast) {
- Function *Callee = getCalledFunction(V, LookThroughBitCast);
- return Callee && Callee->hasFnAttr(Attribute::NoAlias);
+ ImmutableCallSite CS(LookThroughBitCast ? V->stripPointerCasts() : V);
+ return CS && CS.hasFnAttr(Attribute::NoAlias);
}