test/CodeGen/AMDGPU/dead-mi-use-same-intr.mir

# RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -run-pass dead-mi-elimination -o - %s | FileCheck -check-prefix=GCN %s

# GCN-LABEL: name: dead_undef
# GCN:      bb.0:
# GCN-NEXT: S_ENDPGM 0
---
name:            dead_undef
tracksRegLiveness: true
registers:
  - { id: 0, class: vgpr_32 }
  - { id: 1, class: vgpr_32 }
  - { id: 2, class: vgpr_32 }
body: |
  bb.0:
  %0 = IMPLICIT_DEF
  %1 = IMPLICIT_DEF
  dead %2:vgpr_32 = V_MAC_F32_e32 %0:vgpr_32, %1:vgpr_32, undef %2:vgpr_32, implicit $exec
  S_ENDPGM 0

# GCN-LABEL: name: dead_defined
# GCN:      bb.0:
# GCN-NEXT: S_ENDPGM 0
---
name:            dead_defined
tracksRegLiveness: true
registers:
  - { id: 0, class: vgpr_32 }
  - { id: 1, class: vgpr_32 }
  - { id: 2, class: vgpr_32 }
body: |
  bb.0:
  %0 = IMPLICIT_DEF
  %1 = IMPLICIT_DEF
  %2 = IMPLICIT_DEF
  dead %2:vgpr_32 = V_MAC_F32_e32 %0:vgpr_32, %1:vgpr_32, %2:vgpr_32, implicit $exec
  S_ENDPGM 0

# Probably this dead mac can be removed anyway.
# GCN-LABEL: name: dead_def_live_use
# GCN:      dead %2:vgpr_32 = V_MAC_F32_e32 %0, %1, %2, implicit $exec
---
name:            dead_def_live_use
tracksRegLiveness: true
registers:
  - { id: 0, class: vgpr_32 }
  - { id: 1, class: vgpr_32 }
  - { id: 2, class: vgpr_32 }
body: |
  bb.0:
  %0 = IMPLICIT_DEF
  %1 = IMPLICIT_DEF
  %2 = IMPLICIT_DEF
  GLOBAL_STORE_DWORD undef $vgpr0_vgpr1, %2, 0, 0, 0, 0, implicit $exec
  dead %2:vgpr_32 = V_MAC_F32_e32 %0:vgpr_32, %1:vgpr_32, %2:vgpr_32, implicit $exec
  S_ENDPGM 0