https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109807
--- Comment #4 from Haochen Jiang <haochen.jiang at intel dot com> --- (In reply to Uroš Bizjak from comment #2) > (In reply to Haochen Jiang from comment #1) > > I further checked the reason, V2SI should never dropped into that function > > because we have no pattern under V2SI. > > > > I suppose it is because -march=cascadelake will open SSE4.1, with the new > > pattern, it wrongly dropped into that. > > > > -m32 will not ICE since TARGET_MMX_WITH_SSE need 64 bit and won't enable the > > new pattern. > > V2SI mul was introduced in r14-493 (AKA partial fix for PR109690). I see. So we might need to add cost for that right?
