[Bug target/93243] misoptimization: minor changes of the code leads change up to +/- 30% performance on x86_64, -Os faster than -Ofast/O2/O3

[leo at yuriev dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93243

--- Comment #5 from Leo Yuriev <leo at yuriev dot ru> ---
Created attachment 47658
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47658&action=edit
testcase makefile