https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103641
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |12.0 Summary|[11/12 regression] Severe |[11 regression] Severe |compile time regression in |compile time regression in |SLP vectorize step |SLP vectorize step Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #31 from Richard Biener <rguenth at gcc dot gnu.org> --- Marking fixed for GCC 12 then (still 35% with SLP vectorization is on the high end). I'm not sure about backporting this particular change, I'll definitely wait more for that. I suppose the slowness is still entirely within synth_mult?