[Bug tree-optimization/118852] [15 regression] Train run of 502.gcc_r compiled with -Ofast -fprofile-generate -march=x86_64-v3 fails

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118852

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 60487
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60487&action=edit
preprocessed, unincluded source

Needs -std=c99 -fgnu89-inline -fpermissive in addition to -Ofast
-march=x86-64-v3 -fprofile-generate to reproduce the issue.

-fdbg-cnt=vect_loop:6-6

only vectorizes a single problematic loop.  I have not spotted the actual
problem with it yet.