Inline the 'hasIncompatibleWithVarArgsAttrs' method into its only uses. And some minor comment reformatting.

llvm-svn: 170516
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 3c8166e..7babf32 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1103,7 +1103,8 @@
       if (CallerPAL.getSlot(i - 1).Index <= FT->getNumParams())
         break;
       Attribute PAttrs = CallerPAL.getSlot(i - 1).Attrs;
-      if (PAttrs.hasIncompatibleWithVarArgsAttrs())
+      // Check if it has an attribute that's incompatible with varargs.
+      if (PAttrs.hasAttribute(Attribute::StructRet))
         return false;
     }