[Bug tree-optimization/128267] [15/16/17 Regression] wrong code at -O2 with -march=x86-64-v4: a signed char shift induction is 64 again instead of 0 after 256 iterations

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128267

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|wrong code at -O2 with      |[15/16/17 Regression] wrong
                   |-march=x86-64-v4: a signed  |code at -O2 with
                   |char shift induction is 64  |-march=x86-64-v4: a signed
                   |again instead of 0 after    |char shift induction is 64
                   |256 iterations              |again instead of 0 after
                   |                            |256 iterations
   Target Milestone|---                         |15.4