[Bug target/69140] [5/6 regression] Stack alignment + O1 breaks on x86_64

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69140

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> This worked fine in some pre-5.3 dev builds (as confirmed when testing bug
> 66697 fix). git bisect identifies r230176 as the cause of the regression:
> 
> ---
> commit 6ca53fc513f4efdca56af52439ffc5a49b9e6e21
> Author: ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4>
> Date:   Wed Nov 11 14:56:17 2015 +0000
> 
>         PR target/67265
>         * ira.c (ira_setup_eliminable_regset): Do not necessarily create the
>         frame pointer for stack checking if non-call exceptions aren't used.
>         * config/i386/i386.c (ix86_finalize_stack_realign_flags): Likewise.

As expected, reverting the patch doesn't change anything on the 5 branch, so
I'd suggest either filling a bug report for 'git bisect' or double checking its
result next time.