[Bug bootstrap/121623] [15/16 regression] [ia64] bootstrap comparison failure (differently ordered st8s in MMI for gcc/trans-mem.o), stage 2 -> 3

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121623

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[ia64] bootstrap comparison |[15/16 regression] [ia64]
                   |failure (differently        |bootstrap comparison
                   |ordered st8s in MMI for     |failure (differently
                   |gcc/trans-mem.o), stage 2   |ordered st8s in MMI for
                   |-> 3                        |gcc/trans-mem.o), stage 2
                   |                            |-> 3
   Target Milestone|---                         |15.3
           Keywords|                            |compare-debug-failure

--- Comment #6 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Frank Scheiner from comment #5)
> But for the comparison the results are stripped and the comparison happens
> for temporary files, yes? 

The debug information which is "carried along" in debug insns confuses a pass,
probably selective scheduling here, which causes the different ordering.