Add a FIXME comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25635 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index 9dfbe11..7b00b4e 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -1932,6 +1932,7 @@
// Don't fold any node which reads or writes a flag and has multiple uses.
// FIXME: we really need to separate the concepts of flag and "glue". Those
// real flag results, e.g. X86CMP output, can have multiple uses.
+ // FIXME: If the incoming flag is optional. Then it is ok to fold it.
if (!EmittedCheck &&
(PatternHasProperty(N, SDNodeInfo::SDNPInFlag, ISE) ||
PatternHasProperty(N, SDNodeInfo::SDNPOptInFlag, ISE) ||