[AA] Use CallSite cast idiom. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244045 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Analysis/AliasAnalysis.cpp b/lib/Analysis/AliasAnalysis.cpp
index 9e69342e80bd207c3e4b868269bf72837d2e5766..43f6622a994faf9c2f6192d3e7f99b1e6b0713fc 100644 (file)
--- a/lib/Analysis/AliasAnalysis.cpp
+++ b/lib/Analysis/AliasAnalysis.cpp
@@ -455,9 +455,8 @@ bool AliasAnalysis::canInstructionRangeModRef(const Instruction &I1,
 /// isNoAliasCall - Return true if this pointer is returned by a noalias
 /// function.
 bool llvm::isNoAliasCall(const Value *V) {
-  if (isa<CallInst>(V) || isa<InvokeInst>(V))
-    return ImmutableCallSite(cast<Instruction>(V))
-      .paramHasAttr(0, Attribute::NoAlias);
+  if (auto CS = ImmutableCallSite(V))
+    return CS.paramHasAttr(0, Attribute::NoAlias);
   return false;
 }