[Bug tree-optimization/123604] [15/16 regression] Regression: GCC 15 creates 50 % longer loop than GCC 14

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123604

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2026-01-15
             Status|UNCONFIRMED                 |WAITING
   Target Milestone|---                         |15.3
            Summary|Regression: GCC 15 creates  |[15/16 regression]
                   |50 % longer loop than GCC   |Regression: GCC 15 creates
                   |14                          |50 % longer loop than GCC
                   |                            |14
           Keywords|                            |code-size,
                   |                            |missed-optimization,
                   |                            |needs-source
          Component|c                           |tree-optimization
     Ever confirmed|0                           |1

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
Please see https://gcc.gnu.org/bugs/. Godbolt links are OK but we need
attachments as well.