[update_mir_test_checks] Add missing MIFlags (#150012)

If the update_mir_test_checks.py script is aware of MIFlags, it can produce
meaningful identifiers in generated FileCheck lines. A few MIFlags that were
introduced more recently have been missing from the script.

Ideally, the MIFlags would be specified in a single place and automatically
made known to the script to avoid this divergence, but for now adding a comment
pointing to the script at the place where the MIFlags are printed seems like a
reasonable trade-off.

This PR only regenerates check lines for a single test as an example of the
effect; other affected tests are not regenerated for now to avoid unnecessary
test churn.

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRPrinter.cpp b/llvm/lib/CodeGen/MIRPrinter.cpp
index 7710b50..bc4e299 100644
--- a/llvm/lib/CodeGen/MIRPrinter.cpp
+++ b/llvm/lib/CodeGen/MIRPrinter.cpp
@@ -815,6 +815,9 @@ static void printMI(raw_ostream &OS, MFPrintState &State,
   if (MI.getFlag(MachineInstr::SameSign))
     OS << "samesign ";
 
+  // NOTE: Please add new MIFlags also to the MI_FLAGS_STR in
+  // llvm/utils/update_mir_test_checks.py.
+
   OS << TII->getName(MI.getOpcode());
 
   LS = ListSeparator();