test/CodeGen/AMDGPU/dead_copy.mir

# RUN: llc -o - %s -march=amdgcn -mcpu=fiji  -run-pass=machine-cp -verify-machineinstrs | FileCheck -check-prefix=GCN %s

# GCN-LABEL: dead_copy
# GCN:       bb.0
# GCN-NOT:   dead %vgpr5 = COPY undef %vgpr11, implicit %exec
# GCN:       %vgpr5 = COPY %vgpr11, implicit %exec

---
name: dead_copy

body:    |

  bb.0:
    liveins: %vgpr11, %sgpr0, %sgpr1, %vgpr6, %vgpr7, %vgpr4

    dead %vgpr5 = COPY undef %vgpr11, implicit %exec

    %vgpr5 = COPY %vgpr11, implicit %exec

    %sgpr14 = S_ADD_U32 %sgpr0, target-flags(amdgpu-gotprel) 1136, implicit-def %scc
    %sgpr15 = S_ADDC_U32 %sgpr1, target-flags(amdgpu-gotprel32-lo) 0, implicit-def dead %scc, implicit %scc

    %vgpr10 = COPY killed %sgpr14, implicit %exec
    %vgpr11 = COPY killed %sgpr15, implicit %exec

    FLAT_STORE_DWORDX4 %vgpr10_vgpr11, %vgpr4_vgpr5_vgpr6_vgpr7, 0, 0, 0, implicit %exec, implicit %flat_scr
...