add a FIXME for a CPU model check that should have an attribute instead

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248746 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 3725117..517295a 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1785,7 +1785,8 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
   MaxStoresPerMemmoveOptSize = 4;
   setPrefLoopAlignment(4); // 2^4 bytes.
 
-  // Predictable cmov don't hurt on atom because it's in-order.
+  // A predictable cmov does not hurt on an in-order CPU.
+  // FIXME: Use a CPU attribute to trigger this, not a CPU model.
   PredictableSelectIsExpensive = !Subtarget->isAtom();
   EnableExtLdPromotion = true;
   setPrefFunctionAlignment(4); // 2^4 bytes.