llvm/llvm/test/CodeGen/MIR/AMDGPU/wwm-reserved-regs-not-a-reg.mir

# RUN: not llc -mtriple=amdgcn-amd-amdhsa -run-pass=none -verify-machineinstrs %s -o /dev/null 2>&1 | FileCheck -check-prefix=ERR %s

---
name: invalid_reg
machineFunctionInfo:
# ERR: [[@LINE+1]]:21: expected a named register
  wwmReservedRegs: [123]
body:             |
  bb.0:
    S_ENDPGM 0

...