update_mir_test_checks: update one test for this

ruiling · ruiling · commit 9b809b3ef797 · 2025-05-19T13:06:11.000+08:00
diff --git a/llvm/test/tools/UpdateTestChecks/update_mir_test_checks/Inputs/x86-dead-def.mir b/llvm/test/tools/UpdateTestChecks/update_mir_test_checks/Inputs/x86-dead-def.mir
@@ -14,5 +14,6 @@ body:             |
   bb.1:
     dead %0:gr32(s32) = G_CONSTANT i32 0
     dead undef %1.sub_32bit:gr64(s32) = G_CONSTANT i32 1
+    ; Keep meaningful comment.
     undef %2.sub_32bit:gr64(s32) = G_CONSTANT i32 2
 ...
diff --git a/llvm/test/tools/UpdateTestChecks/update_mir_test_checks/Inputs/x86-dead-def.mir.expected b/llvm/test/tools/UpdateTestChecks/update_mir_test_checks/Inputs/x86-dead-def.mir.expected
@@ -18,5 +18,6 @@ body:             |
     ; CHECK-NEXT: undef [[C2:%[0-9]+]].sub_32bit:gr64(s32) = G_CONSTANT i32 2
     dead %0:gr32(s32) = G_CONSTANT i32 0
     dead undef %1.sub_32bit:gr64(s32) = G_CONSTANT i32 1
+    ; Keep meaningful comment.
     undef %2.sub_32bit:gr64(s32) = G_CONSTANT i32 2
 ...
