[Bug sanitizer/94910] detect_stack_use_after_return=1 is much slower than clang's

[rafael at espindo dot la]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94910

--- Comment #8 from Rafael Avila de Espindola <rafael at espindo dot la> ---
I can confirm that the proposed patch fixes the issue for me.

Thank you so much!