Index: lib/Transforms/IPO/PruneEH.cpp
===================================================================
--- lib/Transforms/IPO/PruneEH.cpp
+++ lib/Transforms/IPO/PruneEH.cpp
@@ -165,9 +165,10 @@
       const AttributeSet &NPAL = AttributeSet::get(
           F->getContext(), AttributeSet::FunctionIndex, NewAttributes);
 
-      if (PAL != NPAL) {
+      F->addAttributes(AttributeSet::FunctionIndex, NPAL);
+
+      if (PAL != F->getAttributes().getFnAttributes()) {
         MadeChange = true;
-        F->addAttributes(AttributeSet::FunctionIndex, NPAL);
       }
     }