[Bug tree-optimization/128265] [16/17 Regression] wrong code at -O1 and above: a conditionally read bool union member is loaded while the union holds another member

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128265

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
     Ever confirmed|0                           |1
   Target Milestone|---                         |15.4
   Last reconfirmed|                            |2026-10-28
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot 
gnu.org
            Summary|wrong code at -O1 and       |[16/17 Regression] wrong
                   |above: a conditionally read |code at -O1 and above: a
                   |bool union member is loaded |conditionally read bool
                   |while the union holds       |union member is loaded
                   |another member              |while the union holds
                   |                            |another member

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
phiprop needs to handle this case better.