https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87650
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Component|target |middle-end Ever confirmed|0 |1 Last reconfirmed| |2021-08-16 Severity|normal |enhancement --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- If I saw these two statements: auto m = n%2; n = n/2; GCC is able to produce the testb. This is due to the shift clobbering the flags. I wonder if we could produce better code during expand.