llvm/test/CodeGen/AMDGPU/early-term.mir

# RUN: llc -mtriple=amdgpu9.00 -run-pass=si-late-branch-lowering -verify-machineinstrs  %s -o - | FileCheck -check-prefixes=GCN,GFX9 %s
# RUN: llc -mtriple=amdgpu10.10 -mattr=+wavefrontsize64 -run-pass=si-late-branch-lowering -verify-machineinstrs  %s -o - | FileCheck -check-prefixes=GCN,GFX10 %s
# RUN: llc -mtriple=amdgpu11.00 -mattr=+wavefrontsize64 -run-pass=si-late-branch-lowering -verify-machineinstrs  %s -o - | FileCheck -check-prefixes=GCN,GFX11 %s

# RUN: llc -mtriple=amdgpu11.00 -mattr=+wavefrontsize64 -passes=si-late-branch-lowering %s -o - | FileCheck -check-prefixes=GCN,GFX11 %s

--- |
  define amdgpu_ps void @early_term_scc0_end_block() {
    ret void
  }

  define amdgpu_ps void @early_term_scc0_trailing_debug() !dbg !5 {
    ret void
  }

  define amdgpu_ps void @early_term_scc0_debug_before_instruction() !dbg !10 {
    ret void
  }

  define amdgpu_ps void @early_term_scc0_debug_before_terminator() !dbg !14 {
    ret void
  }

  define amdgpu_ps void @early_term_scc0_next_terminator() {
    ret void
  }

  define amdgpu_ps void @early_term_scc0_in_block() {
    ret void
  }

  define amdgpu_gs void @early_term_scc0_gs() {
    ret void
  }

  define amdgpu_cs void @early_term_scc0_cs() {
    ret void
  }

  define amdgpu_ps void @early_term_no_export() #0 {
    ret void
  }

  define amdgpu_ps void @early_term_depth_only() #1 {
    ret void
  }

  attributes #0 = { "amdgpu-color-export"="0" "amdgpu-depth-export"="0" }
  attributes #1 = { "amdgpu-color-export"="0" "amdgpu-depth-export"="1" }

  !llvm.dbg.cu = !{!0}
  !llvm.module.flags = !{!3}

  !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "llvm", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
  !1 = !DIFile(filename: "early-term.mir", directory: "/")
  !2 = !{}
  !3 = !{i32 2, !"Debug Info Version", i32 3}
  !4 = !DISubroutineType(types: !2)
  !5 = distinct !DISubprogram(name: "early_term_scc0_trailing_debug", scope: !1, file: !1, line: 1, type: !4, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !6)
  !6 = !{!7}
  !7 = !DILocalVariable(name: "value", scope: !5, file: !1, line: 1, type: !8)
  !8 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  !9 = !DILocation(line: 1, column: 1, scope: !5)
  !10 = distinct !DISubprogram(name: "early_term_scc0_debug_before_instruction", scope: !1, file: !1, line: 2, type: !4, scopeLine: 2, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
  !11 = !{!12}
  !12 = !DILocalVariable(name: "value", scope: !10, file: !1, line: 2, type: !8)
  !13 = !DILocation(line: 2, column: 1, scope: !10)
  !14 = distinct !DISubprogram(name: "early_term_scc0_debug_before_terminator", scope: !1, file: !1, line: 3, type: !4, scopeLine: 3, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !15)
  !15 = !{!16}
  !16 = !DILocalVariable(name: "value", scope: !14, file: !1, line: 3, type: !8)
  !17 = !DILocation(line: 3, column: 1, scope: !14)
...

---
name: early_term_scc0_end_block
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_scc0_end_block
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000), %bb.2(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 0, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec

  bb.1:
    liveins: $vgpr0
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_trailing_debug
tracksRegLiveness: true
body: |
  ; GCN-LABEL: name: early_term_scc0_trailing_debug
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000), %bb.2(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   DBG_VALUE $vgpr0, $noreg, !{{[0-9]+}}, !DIExpression(), debug-location !DILocation(line: 1, column: 1, scope: !{{[0-9]+}})
  ; GCN-NEXT:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN-NEXT: {{  $}}
  ; GCN-NEXT: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 0, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    DBG_VALUE $vgpr0, $noreg, !7, !DIExpression(), debug-location !9

  bb.1:
    liveins: $vgpr0
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_debug_before_instruction
tracksRegLiveness: true
body: |
  ; GCN-LABEL: name: early_term_scc0_debug_before_instruction
  ; GCN: bb.0:
  ; GCN:   successors: %bb.3(0x40000000), %bb.2(0x40000000)
  ; GCN:   S_CBRANCH_SCC0
  ; GCN: bb.3:
  ; GCN-NEXT:   successors: %bb.1(0x80000000)
  ; GCN-NEXT:   liveins: $vgpr0, $scc
  ; GCN-NEXT: {{  $}}
  ; GCN-NEXT:   DBG_VALUE $vgpr0, $noreg, !{{[0-9]+}}, !DIExpression(), debug-location !DILocation(line: 2, column: 1, scope: !{{[0-9]+}})
  ; GCN-NEXT:   $vgpr1 = V_MOV_B32_e32 1, implicit $exec
  ; GCN: bb.1:
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    DBG_VALUE $vgpr0, $noreg, !12, !DIExpression(), debug-location !13
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec

  bb.1:
    liveins: $vgpr0, $vgpr1
    EXP 1, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_debug_before_terminator
tracksRegLiveness: true
body: |
  ; GCN-LABEL: name: early_term_scc0_debug_before_terminator
  ; GCN: bb.0:
  ; GCN:   successors: %bb.2(0x80000000), %bb.3(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN-NEXT:   DBG_VALUE $vgpr0, $noreg, !{{[0-9]+}}, !DIExpression(), debug-location !DILocation(line: 3, column: 1, scope: !{{[0-9]+}})
  ; GCN-NEXT:   S_CBRANCH_SCC0 %bb.3, implicit $scc
  ; GCN-NEXT:   S_BRANCH %bb.2
  ; GCN: bb.1:
  ; GCN:   successors: %bb.2(0x80000000)
  ; GCN:   $vgpr0 = V_MOV_B32_e32 1, implicit $exec
  ; GCN: bb.2:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.3:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 0, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.2

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    DBG_VALUE $vgpr0, $noreg, !16, !DIExpression(), debug-location !17
    S_BRANCH %bb.2

  bb.1:
    successors: %bb.2
    $vgpr0 = V_MOV_B32_e32 1, implicit $exec
    S_BRANCH %bb.2

  bb.2:
    liveins: $vgpr0
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_next_terminator
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_scc0_next_terminator
  ; GCN: bb.0:
  ; GCN:   successors: %bb.2(0x80000000), %bb.3(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.3, implicit $scc
  ; GCN:   S_BRANCH %bb.2
  ; GCN: bb.1:
  ; GCN:   successors: %bb.2(0x80000000)
  ; GCN:   $vgpr0 = V_MOV_B32_e32 1, implicit $exec
  ; GCN: bb.2:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.3:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 0, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.2

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    S_BRANCH %bb.2

  bb.1:
    successors: %bb.2
    $vgpr0 = V_MOV_B32_e32 1, implicit $exec
    S_BRANCH %bb.2

  bb.2:
    liveins: $vgpr0
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_in_block
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_scc0_in_block
  ; GCN: bb.0:
  ; GCN:   successors: %bb.3(0x40000000), %bb.2(0x40000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN: bb.3:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   liveins: $vgpr0, $scc
  ; GCN:   $vgpr1 = V_MOV_B32_e32 1, implicit $exec
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0, $vgpr1
  ; GCN:   EXP 1, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 0, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec
    $vgpr1 = V_MOV_B32_e32 1, implicit $exec

  bb.1:
    liveins: $vgpr0, $vgpr1
    EXP 1, $vgpr1, $vgpr1, $vgpr1, $vgpr1, -1, -1, 15, implicit $exec
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_scc0_gs
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_scc0_gs
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec

  bb.1:
    liveins: $vgpr0
    S_ENDPGM 0
...

---
name: early_term_scc0_cs
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_scc0_cs
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000), %bb.2(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec

  bb.1:
    liveins: $vgpr0
    S_ENDPGM 0
...

---
name: early_term_no_export
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_no_export
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000), %bb.2(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10-NOT: EXP_DONE
  ; GFX11-NOT: EXP_DONE
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec

  bb.1:
    liveins: $vgpr0
    EXP_DONE 0, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...

---
name: early_term_depth_only
tracksRegLiveness: true
liveins:
  - { reg: '$sgpr0' }
  - { reg: '$sgpr1' }
body: |
  ; GCN-LABEL: name: early_term_depth_only
  ; GCN: bb.0:
  ; GCN:   successors: %bb.1(0x80000000), %bb.2(0x00000000)
  ; GCN:   liveins: $sgpr0, $sgpr1
  ; GCN:   $vgpr0 = V_MOV_B32_e32 0, implicit $exec
  ; GCN:   dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
  ; GCN:   S_CBRANCH_SCC0 %bb.2, implicit $scc
  ; GCN: bb.1:
  ; GCN:   liveins: $vgpr0
  ; GCN:   EXP_DONE 8, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
  ; GCN:   S_ENDPGM 0
  ; GCN: bb.2:
  ; GCN:   $exec = S_MOV_B64 0
  ; GFX9:  EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX10: EXP_DONE 9, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GFX11: EXP_DONE 8, undef $vgpr0, undef $vgpr0, undef $vgpr0, undef $vgpr0, 1, 0, 0, implicit $exec
  ; GCN:   S_ENDPGM 0
  bb.0:
    liveins: $sgpr0, $sgpr1
    successors: %bb.1

    $vgpr0 = V_MOV_B32_e32 0, implicit $exec
    dead $sgpr0 = S_AND_B32 $sgpr0, killed $sgpr1, implicit-def $scc
    SI_EARLY_TERMINATE_SCC0 implicit $scc, implicit $exec

  bb.1:
    liveins: $vgpr0
    EXP_DONE 8, $vgpr0, $vgpr0, $vgpr0, $vgpr0, -1, -1, 15, implicit $exec
    S_ENDPGM 0
...