TailDuplicator: Use optForSize instead of hasFnAttribute.

This will cause minsize functions to have the same threshold as optsize
functions, but otherwise should have no effects.

llvm-svn: 278980

llvm/lib/CodeGen/TailDuplicator.cpp

@@ -513,7 +513,7 @@ bool TailDuplicator::shouldTailDuplicate(const MachineFunction &MF,
   unsigned MaxDuplicateCount;
   if (TailDuplicateSize.getNumOccurrences() == 0 &&
       // FIXME: Use Function::optForSize().
-      MF.getFunction()->hasFnAttribute(Attribute::OptimizeForSize))
+      MF.getFunction()->optForSize())
     MaxDuplicateCount = 1;
   else
     MaxDuplicateCount = TailDuplicateSize;