llvm/test/CodeGen/AMDGPU/hazard.mir

# RUN: llc -mtriple=amdgpu8.02 -verify-machineinstrs -run-pass post-RA-hazard-rec %s -o - | FileCheck -check-prefix=GCN -check-prefix=VI %s
# RUN: llc -mtriple=amdgpu8.03 -verify-machineinstrs -run-pass post-RA-hazard-rec %s -o - | FileCheck -check-prefix=GCN -check-prefix=GFX8 %s
# RUN: llc -mtriple=amdgpu9.00 -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:       1
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 $mode, implicit $m0, implicit $exec
    SI_RETURN_TO_EPILOG killed $vgpr5, killed $vgpr0

...

# GCN-LABEL: name: hazard_inlineasm
# GCN:    bb.0.entry:
# GCN:      $m0 = S_MOV_B32
# GFX9:     S_NOP 0
# VI-NOT:   S_NOP_0
# GCN:      V_INTERP_P1_F32
---
name:            hazard_inlineasm
alignment:       1
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
liveins:
  - { reg: '$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 $mode, 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
...
# GCN-LABEL: name: hazard-lookahead-wave-barrier
# GCN: S_WAITCNT .Vmcnt_0_Expcnt_0_Lgkmcnt_0
# GCN-NEXT: S_NOP 0
# GCN-NEXT: V_ADD_F16_dpp
---
name: hazard-lookahead-wave-barrier
body: |
  bb.0:
    liveins: $vgpr0, $vgpr1, $vgpr3

    renamable $vgpr1 = contract nofpexcept V_ADD_F16_e32 killed $vgpr1, $vgpr0, implicit $mode, implicit $exec
    WAVE_BARRIER
    S_WAITCNT 0
    renamable $vgpr2 = contract nofpexcept V_ADD_F16_dpp undef $vgpr2, 0, $vgpr1, 0, $vgpr3, 273, 15, 15, 1, implicit $mode, implicit $exec
...
# GCN-LABEL: name: hazard-lookahead-masked-unreachable
# GCN: SI_MASKED_UNREACHABLE
# GCN-NEXT: S_NOP 0
# GCN-NEXT: S_SENDMSG
---
name: hazard-lookahead-masked-unreachable
body: |
  bb.0:
    $m0 = S_MOV_B32 -1
    SI_MASKED_UNREACHABLE
    S_SENDMSG 3, implicit $exec, implicit $m0

  bb.1:
    S_ENDPGM 0
...
# GCN-LABEL: name: fallthrough-hazard-lookahead-masked-unreachable
# GCN: SI_MASKED_UNREACHABLE
# GCN-LABEL: bb.1:
# GCN-NEXT: S_NOP 0
# GCN-NEXT: S_SENDMSG
---
name: fallthrough-hazard-lookahead-masked-unreachable
body: |
  bb.0:
    $m0 = S_MOV_B32 -1
    SI_MASKED_UNREACHABLE

  bb.1:
    S_SENDMSG 3, implicit $exec, implicit $m0
    S_ENDPGM 0
...

# GCN-LABEL: name: buffer_store_lds_dword
# GCN:       $m0 = S_MOV_B32 0
# GFX9-NEXT: S_NOP 0
# GCN-NEXT:  BUFFER_STORE_LDS_DWORD
---
name: buffer_store_lds_dword
body:             |
  bb.0:
    $m0 = S_MOV_B32 0
    BUFFER_STORE_LDS_DWORD $sgpr0_sgpr1_sgpr2_sgpr3, 0, 0, 0, 0, implicit $exec, implicit $m0
...

# GCN-LABEL: name: lds_direct_read_m0
# GCN:       $m0 = S_MOV_B32 0
# GFX9-NEXT: S_NOP 0
# GCN-NEXT:  V_MOV_B32
---
name: lds_direct_read_m0
body:             |
  bb.0:
    $m0 = S_MOV_B32 0
    $vgpr0 = V_MOV_B32_e32 $lds_direct, implicit $exec, implicit $m0
...