[Bug tree-optimization/127521] [15/16/17 Regression] `ifcombine` incorrectly removes a masked sign-bit condition

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127521

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |14.3.0
      Known to fail|                            |15.1.0
   Target Milestone|---                         |15.4
            Summary|[avr] `ifcombine`           |[15/16/17 Regression]
                   |incorrectly removes a       |`ifcombine` incorrectly
                   |masked sign-bit condition   |removes a masked sign-bit
                   |                            |condition