[Bug target/102491] New: [12 Regression] Assembler messages: Error: no such instruction: `vmovw %xmm0,%eax'

[asolokha at gmx dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102491

            Bug ID: 102491
           Summary: [12 Regression] Assembler messages: Error: no such
                    instruction: `vmovw %xmm0,%eax'
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: assemble-failure, wrong-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

GNU as 2.37 emits the following error:

/tmp/ccp9YvMM.s: Assembler messages:
/tmp/ccp9YvMM.s:279: Error: no such instruction: `vmovw %xmm0,%eax'

when compiling the following testcase w/ gcc-12.0.0-alpha20210919 snapshot
(g:32731fa5b0abf092029b8e2be64319b978bda514) w/ -march=sapphirerapids -O1
-funroll-loops:

int x;

__attribute__ ((simd))
short int
foo (void)
{
  x = 0;

  return 0;
}