[Bug rtl-optimization/68321] [5/6 Regression] wrong code at -O3 on x86_64-linux-gnu (in 64-bit mode)

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68321

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'll try bisecting with --param allow-store-data-races=0.