Use method to query for attributes.

llvm-svn: 165209
diff --git a/llvm/lib/Transforms/IPO/GlobalOpt.cpp b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
index b1ba6be..7e3b45b 100644
--- a/llvm/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2063,7 +2063,7 @@
 
 static AttrListPtr StripNest(const AttrListPtr &Attrs) {
   for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
-    if ((Attrs.getSlot(i).Attrs & Attribute::Nest) == 0)
+    if (!Attrs.getSlot(i).Attrs.hasNestAttr())
       continue;
 
     // There can be only one.