llvm-project/llvm/test/CodeGen/AMDGPU/hazard.mir

# RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -run-pass post-RA-hazard-rec %s -o - | FileCheck -check-prefix=GCN -check-prefix=VI %s
# RUN: llc -march=amdgcn -mcpu=gfx803 -verify-machineinstrs -run-pass post-RA-hazard-rec %s -o - | FileCheck -check-prefix=GCN -check-prefix=GFX8 %s
# RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass post-RA-hazard-rec %s -o - | FileCheck -check-prefix=GCN -check-prefix=GFX9 %s

# GCN-LABEL: name: hazard_implicit_def
# GCN:    bb.0.entry:
# GCN:      $m0 = S_MOV_B32
# GFX9:     S_NOP 0
# VI-NOT:   S_NOP_0
# GCN:      V_INTERP_P1_F32

---
name:            hazard_implicit_def
alignment:       0
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
liveins:
  - { reg: '$sgpr7', virtual-reg: '' }
  - { reg: '$vgpr4', virtual-reg: '' }
body:             |
  bb.0.entry:
    liveins: $sgpr7, $vgpr4

    $m0 = S_MOV_B32 killed $sgpr7
    $vgpr5 = IMPLICIT_DEF
    $vgpr0 = V_INTERP_P1_F32 killed $vgpr4, 0, 0, implicit $m0, implicit $exec
    SI_RETURN_TO_EPILOG killed $vgpr5, killed $vgpr0

...

# GCN-LABEL: name: hazard_inlineasm
# GCN:    bb.0.entry:
# GCN:      $m0 = S_MOV_B32
# GFX9:     S_NOP 0
# VI-NOT:   S_NOP_0
# GCN:      V_INTERP_P1_F32
---
name:            hazard_inlineasm
alignment:       0
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
liveins:
  - { reg: '$sgpr7', virtual-reg: '' }
  - { reg: '$vgpr4', virtual-reg: '' }
body:             |
  bb.0.entry:
    liveins: $sgpr7, $vgpr4

    $m0 = S_MOV_B32 killed $sgpr7
    INLINEASM &"; no-op", 1, 327690, def $vgpr5
    $vgpr0 = V_INTERP_P1_F32 killed $vgpr4, 0, 0, implicit $m0, implicit $exec
    SI_RETURN_TO_EPILOG killed $vgpr5, killed $vgpr0
...

# IMPLICIT_DEF/DBG_VALUE instructions should not prevent the hazard recognizer
# from adding s_nop instructions between m0 update and s_sendmsg.

# GCN-LABEL: name: hazard-lookahead-implicit-def
# GCN: $vgpr6 = IMPLICIT_DEF
# GFX8-NEXT: S_NOP 0
# GFX9-NEXT: S_NOP 0
# GCN: S_SENDMSG 3, implicit $exec, implicit $m0
---
name: hazard-lookahead-implicit-def
body: |
  bb.0:
    $m0 = S_MOV_B32 killed $sgpr12
    $vgpr0 = IMPLICIT_DEF
    $vgpr1 = IMPLICIT_DEF
    $vgpr2 = IMPLICIT_DEF
    $vgpr3 = IMPLICIT_DEF
    $vgpr4 = IMPLICIT_DEF
    $vgpr5 = IMPLICIT_DEF
    $vgpr6 = IMPLICIT_DEF
    S_SENDMSG 3, implicit $exec, implicit $m0
    S_ENDPGM 0
...

# GCN-LABEL: name: hazard-lookahead-dbg-value
# GCN: DBG_VALUE 6
# GFX8-NEXT: S_NOP 0
# GFX9-NEXT: S_NOP 0
# GCN: S_SENDMSG 3, implicit $exec, implicit $m0
---
name: hazard-lookahead-dbg-value
body: |
  bb.0:
    $m0 = S_MOV_B32 killed $sgpr12
    DBG_VALUE 0
    DBG_VALUE 1
    DBG_VALUE 2
    DBG_VALUE 3
    DBG_VALUE 4
    DBG_VALUE 5
    DBG_VALUE 6
    S_SENDMSG 3, implicit $exec, implicit $m0
    S_ENDPGM 0
...

# GCN-LABEL: name: hazard-lookahead-dbg-label
# GCN: DBG_LABEL 6
# GFX8-NEXT: S_NOP 0
# GFX9-NEXT: S_NOP 0
# GCN: S_SENDMSG 3, implicit $exec, implicit $m0
---
name: hazard-lookahead-dbg-label
body: |
  bb.0:
    $m0 = S_MOV_B32 killed $sgpr12
    DBG_LABEL 0
    DBG_LABEL 1
    DBG_LABEL 2
    DBG_LABEL 3
    DBG_LABEL 4
    DBG_LABEL 5
    DBG_LABEL 6
    S_SENDMSG 3, implicit $exec, implicit $m0
    S_ENDPGM 0
...