[Bug c/99623] Code behaves differently at -O2 optimization

[sebastiano.vigna at unimi dot it via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99623

--- Comment #1 from Sebastiano Vigna <sebastiano.vigna at unimi dot it> ---
Created attachment 50407
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50407&action=edit
Output of gcc with -O2