https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102971
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Component|middle-end |target Target|i?86 |i?86-*-* Status|UNCONFIRMED |NEW Last reconfirmed| |2021-10-28 --- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Confirmed. With -mno-stv the assembly looks much better so something is wrong there with costing when deciding to do 64bit math in SSE regs as opposed to GPR pairs.