[Bug rtl-optimization/68988] reload_pseudo_compare_func violates qsort requirements

[y.gribov at samsung dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68988

--- Comment #1 from Yury Gribov <y.gribov at samsung dot com> ---
The bug was detected with SortChecker tool (https://github.com/yugr/sortcheck).