[Bug tree-optimization/116751] GCC trunk (-O3) doesn't optimize a loop that can be folded into a constant

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116751

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unknown                     |15.0
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
          Component|middle-end                  |tree-optimization
   Last reconfirmed|                            |2024-09-18
           Keywords|                            |missed-optimization

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Unroll heuristic is (too) easily confused here I guess.  Note we need to unroll
all loops completely to be able to optimize this.