[Bug tree-optimization/128102] [14/15/16/17 Regression] GCC 12+ keeps a small state-machine loop rolled, 1.85x slower than GCC 11 on x86-64

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128102

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |11.4.0
           Keywords|                            |missed-optimization
            Summary|[12/13/14/15/16/17          |[14/15/16/17 Regression]
                   |Regression] GCC 12+ keeps a |GCC 12+ keeps a small
                   |small state-machine loop    |state-machine loop rolled,
                   |rolled, 1.85x slower than   |1.85x slower than GCC 11 on
                   |GCC 11 on x86-64            |x86-64
   Target Milestone|---                         |14.5