https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71346
Bug ID: 71346 Summary: [AVX-512] AVX-512VL insn emitted when it is disabled Product: gcc Version: 7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: kyukhin at gcc dot gnu.org Target Milestone: --- Testcase attached. Started from Jakub's r235968. Reproduce: ./cc1 1.c -dp -m64 -march=knl -Ofast -quiet -o repro.s 2>/dev/null ; cat repro.s |grep shufps |grep xmm17 Those insns belong to AVX-512VL: vshufps $255, %xmm15, %xmm15, %xmm17 # 680 sse_shufps_v4sf/2 [length = 7] vshufps $85, %xmm12, %xmm12, %xmm17 # 682 sse_shufps_v4sf/2 [length = 7]