Don't add the 'Value' string if there isn't one.

This was causing the folding set to fail to fold attributes, because it was
being calculated in one spot without an empty values string but here with an
empty values string.

llvm-svn: 176301

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/IR/AttributeImpl.h b/llvm/lib/IR/AttributeImpl.h
index cb2c55ccbe7..ad2670dade1 100644
--- a/llvm/lib/IR/AttributeImpl.h
+++ b/llvm/lib/IR/AttributeImpl.h
@@ -146,7 +146,7 @@ public:
   }
   static void Profile(FoldingSetNodeID &ID, StringRef Kind, StringRef Values) {
     ID.AddString(Kind);
-    ID.AddString(Values);
+    if (!Values.empty()) ID.AddString(Values);
   }
 
   // FIXME: Remove this!