https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105940
--- Comment #4 from Kewen Lin <linkw at gcc dot gnu.org> --- (In reply to Richard Biener from comment #2) > (In reply to Kewen Lin from comment #1) > > Created attachment 53126 [details] > > move_applying > > LGTM (maybe the suggested unroll factor should be only applied if the > suggestion was from a matching with/without SLP analysis, or in fact > vect_analyze_loop_1 should communicate that down - disabling SLP when > the one suggesting unrolling did the re-analysis). Oops, just noticed the nice suggestion. Will make a follow up patch for this. It would looks like: when working out suggested unroll factor, save slp decision into one passed down variable from vect_analyze_loop_1. when applying suggested unroll factor, if the save slp is false, directly ignore slp handlings, otherwise, go the normal slp path but won't start over for slp off.
