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

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

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

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[15/16/17 Regression]       |[15/16 Regression]
                   |`ifcombine` incorrectly     |`ifcombine` incorrectly
                   |removes a masked sign-bit   |removes a masked sign-bit
                   |condition                   |condition
      Known to work|                            |17.0
           Priority|P3                          |P2