[IR] Make paramHasAttr to use arg indices instead of attr indices

This avoids the confusing 'CS.paramHasAttr(ArgNo + 1, Foo)' pattern.

Previously we were testing return value attributes with index 0, so I
introduced hasReturnAttr() for that use case.

llvm-svn: 300367

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Analysis/AliasAnalysis.cpp b/llvm/lib/Analysis/AliasAnalysis.cpp
index 4c6423d5c17..4c29aeaa622 100644
--- a/llvm/lib/Analysis/AliasAnalysis.cpp
+++ b/llvm/lib/Analysis/AliasAnalysis.cpp
@@ -697,7 +697,7 @@ AAResults llvm::createLegacyPMAAResults(Pass &P, Function &F,
 
 bool llvm::isNoAliasCall(const Value *V) {
   if (auto CS = ImmutableCallSite(V))
-    return CS.paramHasAttr(0, Attribute::NoAlias);
+    return CS.hasRetAttr(Attribute::NoAlias);
   return false;
 }