[Bug target/71019] New: AVX512BW instructions emitted even without AVX512BW

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71019

            Bug ID: 71019
           Summary: AVX512BW instructions emitted even without AVX512BW
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

With -mavx512vl -mno-avx512bw GCC emits vpack{ss,us}{wb,dw} EVEX encoded
instructions even when they are only in the AVX512BW ISA.