Add a fixme note!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index ed74ee0..03471c7 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -2572,6 +2572,8 @@
 /// Instead of
 ///   cvtss2sd (%rdi), %xmm0
 ///
+/// FIXME: This should be turned into a TSFlags.
+///
 static bool hasPartialRegUpdate(unsigned Opcode) {
   switch (Opcode) {
   case X86::CVTSD2SSrr: