[Bug tree-optimization/127628] [15/16/17 Regression] wrong code at -O{2,3} with "-fno-tree-ccp -fno-inline -fno-tree-pre -fno-tree-vrp" on x86_64-linux-gnu

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127628

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 65697
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65697&action=edit
First step to reduce, remove the looping part