[Bug target/125949] New: x86: avxvnniint8 instructions with higher registers ( evex prefix) getting generated for -march=znver6

[vekumar at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125949

            Bug ID: 125949
           Summary: x86: avxvnniint8 instructions with higher registers (
                    evex prefix) getting generated for -march=znver6
           Product: gcc
           Version: 16.1.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vekumar at gcc dot gnu.org
  Target Milestone: ---

Created attachment 64831
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64831&action=edit
test case with avxvnniint8 intrinsics.

When the test case is compiled with -march=znver6, avxvnniint8 instruction with
higher registers xmm/ymm >15 is getting generated. 

ref: https://godbolt.org/z/3hq3e8EGP