wrap OptSize and MinSize attributes for easier and consistent access (NFCI)

Create wrapper methods in the Function class for the OptimizeForSize and MinSize
attributes. We want to hide the logic of "or'ing" them together when optimizing
just for size (-Os).

Currently, we are not consistent about this and rely on a front-end to always set
OptimizeForSize (-Os) if MinSize (-Oz) is on. Thus, there are 18 FIXME changes here
that should be added as follow-on patches with regression tests.

This patch is NFC-intended: it just replaces existing direct accesses of the attributes
by the equivalent wrapper call.

Differential Revision: http://reviews.llvm.org/D11734

llvm-svn: 243994

1 files changed, 2 insertions, 4 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
index 03a613b1691..fd8ca209c73 100644
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -8422,10 +8422,8 @@ static SDValue performSTORECombine(SDNode *N,
   if (!Subtarget->isCyclone())
     return SDValue();
 
-  // Don't split at Oz.
-  MachineFunction &MF = DAG.getMachineFunction();
-  bool IsMinSize = MF.getFunction()->hasFnAttribute(Attribute::MinSize);
-  if (IsMinSize)
+  // Don't split at -Oz.
+  if (DAG.getMachineFunction().getFunction()->optForMinSize())
     return SDValue();
 
   SDValue StVal = S->getValue();