Add a note about commuting conditional move.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74241 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/README.txt b/lib/Target/ARM/README.txt
index 3e248a6..4223699 100644 (file)
--- a/lib/Target/ARM/README.txt
+++ b/lib/Target/ARM/README.txt
@@ -528,3 +528,5 @@ those operations and the ARMv6 scalar versions.
 
 //===---------------------------------------------------------------------===//
 
+ARM::MOVCCr is commutable (by flipping the condition). But we need to implement
+ARMInstrInfo::commuteInstruction() to support it.