https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37150
--- Comment #20 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > (maybe you can benchmark with -fno-vect-cost-model?) Compiling the code in comment 0 with -fno-vect-cost-model leads to % grep mulpd pr37150.s | wc -l 142 % grep mulsd pr37150.s | wc -l 0