third_party/llvm-7.0/llvm/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
...