[Bug tree-optimization/127588] [17 Regression] wrong code at -O{2, 3} with -fno-vect-cost-model on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127588

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
            Version|16.0                        |17.0
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2026-09-24
            Summary|wrong code at -O{2,3} with  |[17 Regression] wrong code
                   |-fno-vect-cost-model on     |at -O{2,3} with
                   |x86_64-linux-gnu            |-fno-vect-cost-model on
                   |                            |x86_64-linux-gnu
           Keywords|                            |needs-bisection, wrong-code
   Target Milestone|---                         |17.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I know what goes wrong.