https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97194
--- Comment #20 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to Richard Biener from comment #18) > (In reply to Hongtao.liu from comment #16) > > (In reply to Hongtao.liu from comment #15) > > > I'm working on add the expander, i encounter a problem. > > > > > > for V32HI vec_set with constant index, the expander existed under > > > TARGET_AVX512F, but for variable index, the expander should be existed > > > under > > > TARGET_AVX512BW, since vpcmpw zmm only existed in TARGET_AVX512BW, we need > > > to restricted the expander under TARGET_AVX512BW, unfortunately operands > > > is > > > unvisible in condition scope, any solution to handle such issue? > > > > Or break V32HI into V16HI and V8HI when TARGET_AVX512BW is not existed. > > That sounds like a good implementation strathegy, I suppose AVX512F implies > AVX2 even when AVX512VL is not available. Yes, but not sure performance impact, maybe better generate code "like" expander not existed.
