[Bug tree-optimization/111445] [12/13/14 Regression] Wrong code at -Os on x86_64-linux-gnu since r12-1077-g57bf3751511

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111445

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Wrong code at -Os on        |[12/13/14 Regression] Wrong
                   |x86_64-linux-gnu since      |code at -Os on
                   |r12-1077-g57bf3751511       |x86_64-linux-gnu since
                   |                            |r12-1077-g57bf3751511
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-09-17
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |12.4

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. Though I think r12-1077-g57bf3751511 just exposed the issue.
-fno-ivopts causes the bug to go away. So does -fwrapv . So I suspect IV-OPTS
is introducing some signed integer overflow for this ...