https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79127
--- Comment #4 from Rainer Emrich <rai...@emrich-ebersheim.de> --- Created attachment 40534 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40534&action=edit assembly Here's the assembly. AFAICS the issue is in matmul_i4_avx512f.