https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88464
--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Uroš Bizjak from comment #19) > FYI, there are quite some sequences like: > > kmovw %k1, %r11d > testb %r11b, %r11b > jne .L63 > > (e.g. when compiling avx512f-pr88464-1.c). > > Perhaps ktest insn can be utilized here? It can if -mavx512dq, because we need ktestb rather than ktestw. Or we could do kandw first, but that would be longer (movl $255, %r11d; kmovw $r11d, %k2; kandw %k1, %k2; ktestw %k2, %k2). Have you tried with -mavx512dq? I haven't added it to dg-options of the tests, because I wanted to test the behavior without it too and duplicating all the tests also for -mavx512dq would be too much.
