[Bug target/123607] New: incorrect masked store vmovsh instruction emitted

[mkretz at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123607

            Bug ID: 123607
           Summary: incorrect masked store vmovsh instruction emitted
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mkretz at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*

With -march=graniterapids I get

  vmovsh %xmm0, (%rsp){%k1}{z}

in some of my std::simd tests. The {z} part shouldn't exist for masked stores,
no? The assembler complains "error: unsupported masking for `vmovsh'".

I'm currently working on reducing a simple test case. I'll add it ASAP.