Remove the Function::getFnAttributes method in favor of using the AttributeSet
directly.

This is in preparation for removing the use of the 'Attribute' class as a
collection of attributes. That will shift to the AttributeSet class instead.

llvm-svn: 171253
diff --git a/llvm/lib/CodeGen/CodePlacementOpt.cpp b/llvm/lib/CodeGen/CodePlacementOpt.cpp
index 75dbf72..2451844 100644
--- a/llvm/lib/CodeGen/CodePlacementOpt.cpp
+++ b/llvm/lib/CodeGen/CodePlacementOpt.cpp
@@ -373,7 +373,8 @@
 ///
 bool CodePlacementOpt::AlignLoops(MachineFunction &MF) {
   const Function *F = MF.getFunction();
-  if (F->getFnAttributes().hasAttribute(Attribute::OptimizeForSize))
+  if (F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
+                                      Attribute::OptimizeForSize))
     return false;
 
   unsigned Align = TLI->getPrefLoopAlignment();