https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112518
--- Comment #4 from Zdenek Sojka <zsojka at seznam dot cz> --- (In reply to Andrew Pinski from comment #3) > I cannot reproduce it with r14-5450-g4db820928065ec or > r14-5427-gd22b87864e5d47 . Thank you for the investigation! Either the flags have changed, or I did something very wrong; now it needs -mbmi2 to fail: (FAILs for me on r14-5443 , r14-5456 and r14-5476 ) $ md5sum testcase.c 5bc2d32fe8096769aca6bca7fb07470f testcase.c $ x86_64-pc-linux-gnu-gcc -Os -mbmi2 testcase.c $ ./a.out Aborted