https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69140
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-01-05
Summary|[5/6 regression] Stack |[5/6 regression] Stack
|alignment + O1 breaks on |alignment + O1 breaks on
|x86_64 [introduced by |x86_64
|r230176 ] |
Ever confirmed|0 |1
--- Comment #4 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.
Really sure? This change is a no-op unless you use -fstack-check.
