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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

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# RUN: llc -mtriple=amdgcn -amdgpu-enable-merge-m0 -verify-machineinstrs -run-pass si-fix-sgpr-copies %s -o - | FileCheck -check-prefix=GCN %s
# GCN-LABEL: name: merge-m0-many-init
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 65536
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 65536
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.2:
# GCN: SI_INIT_M0 65536
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.3:
# GCN: SI_INIT_M0 3
# GCN: bb.4:
# GCN-NOT: SI_INIT_M0
# GCN: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 4
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.5:
# GCN-NOT: SI_INIT_M0
# GCN: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 4
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.6:
# GCN: SI_INIT_M0 -1,
# GCN-NEXT: DS_WRITE_B32
# GCN: SI_INIT_M0 %2
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 %2
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
---
name: merge-m0-many-init
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sreg_32_xm0 }
body: |
bb.0.entry:
successors: %bb.1, %bb.2
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.1:
successors: %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.2
bb.2:
successors: %bb.3
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.3
bb.3:
successors: %bb.4, %bb.5
S_CBRANCH_VCCZ %bb.4, implicit undef $vcc
S_BRANCH %bb.5
bb.4:
successors: %bb.6
SI_INIT_M0 3, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 4, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.6
bb.5:
successors: %bb.6
SI_INIT_M0 3, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 4, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.6
bb.6:
successors: %bb.0.entry, %bb.6
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
%2 = IMPLICIT_DEF
SI_INIT_M0 %2, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 %2, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.6, implicit undef $vcc
S_BRANCH %bb.0.entry
...
# GCN-LABEL: name: merge-m0-dont-hoist-past-init-with-different-initializer
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 65536
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN-NOT: SI_INIT_M0 65536
# GCN-NOT: SI_INIT_M0 -1
# GCN: bb.2:
# GCN: SI_INIT_M0 -1
# GCN: bb.3:
# GCN: SI_INIT_M0 -1
---
name: merge-m0-dont-hoist-past-init-with-different-initializer
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.2, %bb.3
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.2, implicit undef $vcc
S_BRANCH %bb.3
bb.2:
successors: %bb.4
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.4
bb.3:
successors: %bb.4
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.4
bb.4:
S_ENDPGM 0
...
# GCN-LABEL: name: merge-m0-after-prologue
# GCN: bb.0.entry:
# GCN-NOT: SI_INIT_M0
# GCN: S_OR_B64
# GCN-NEXT: SI_INIT_M0
# GCN: bb.1:
# GCN-NOT: SI_INIT_M0 -1
# GCN: bb.2:
# GCN-NOT: SI_INIT_MO -1
---
name: merge-m0-after-prologue
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
body: |
bb.0.entry:
successors: %bb.1, %bb.2
liveins: $sgpr0_sgpr1
$exec = S_OR_B64 $exec, killed $sgpr0_sgpr1, implicit-def $scc
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.1:
successors: %bb.3
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.3
bb.2:
successors: %bb.3
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.3
bb.3:
S_ENDPGM 0
...
# GCN-LABEL: name: move-m0-avoid-hazard
# GCN: $m0 = S_MOV_B32 -1
# GCN-NEXT: $vgpr0 = V_MOV_B32_e32 0, implicit $exec
# GCN-NEXT: DS_GWS_INIT $vgpr0, 0, implicit $m0, implicit $exec
---
name: move-m0-avoid-hazard
body: |
bb.0:
$vgpr0 = V_MOV_B32_e32 0, implicit $exec
$m0 = S_MOV_B32 -1
DS_GWS_INIT $vgpr0, 0, implicit $m0, implicit $exec
...
# GCN-LABEL: name: move-m0-with-prologue
# GCN: $exec = S_OR_B64 $exec, killed $sgpr0_sgpr1, implicit-def $scc
# GCN: $m0 = S_MOV_B32 -1
# GCN-NEXT: $vgpr0 = V_MOV_B32_e32 0, implicit $exec
# GCN-NEXT: DS_GWS_INIT $vgpr0, 0, implicit $m0, implicit $exec
---
name: move-m0-with-prologue
body: |
bb.0:
liveins: $sgpr0_sgpr1
$exec = S_OR_B64 $exec, killed $sgpr0_sgpr1, implicit-def $scc
$vgpr0 = V_MOV_B32_e32 0, implicit $exec
$m0 = S_MOV_B32 -1
DS_GWS_INIT $vgpr0, 0, implicit $m0, implicit $exec
...
# GCN-LABEL: name: move-m0-different-initializer
# GCN: SI_INIT_M0 -1
# GCN-NEXT: %0:vgpr_32 = IMPLICIT_DEF
# GCN: SI_INIT_M0 65536
# GCN-NEXT: S_NOP
---
name: move-m0-different-initializer
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
body: |
bb.0:
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_NOP 0
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
...
# GCN-LABEL: name: move-m0-schedule-boundary
# GCN: S_SETREG
# GCN-NEXT: SI_INIT_M0 -1
---
name: move-m0-schedule-boundary
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
body: |
bb.0:
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
S_SETREG_IMM32_B32 0, 1, implicit-def $mode, implicit $mode
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
...
# GCN-LABEL: name: m0-in-loop-0
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: $m0 = COPY %2
---
name: m0-in-loop-0
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-1
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN-NOT: SI_INIT_M0 -1
# GCN: DS_WRITE_B32
---
name: m0-in-loop-1
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-2
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: $m0 = COPY %2
# GCN-NEXT: SENDMSG
# GCN-NEXT: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
---
name: m0-in-loop-2
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-3
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: $m0 = COPY %2
# GCN-NEXT: SENDMSG
# GCN-NEXT: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
---
name: m0-in-loop-3
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-4
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: $m0 = COPY %2
# GCN-NEXT: SENDMSG
---
name: m0-in-loop-4
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-5
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 65536
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: $m0 = COPY %2
# GCN-NEXT: SENDMSG
---
name: m0-in-loop-5
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.1, %bb.2
SI_INIT_M0 65536, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.2
bb.2:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-6
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: $m0 = COPY %2
# GCN-NEXT: SENDMSG
---
name: m0-in-loop-6
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
S_BRANCH %bb.2
bb.2:
successors: %bb.3, %bb.1
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.3
bb.3:
S_ENDPGM 0
...
# GCN-LABEL: name: m0-in-loop-7
# GCN: bb.0.entry:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: IMPLICIT_DEF
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.1:
# GCN: SI_INIT_M0 -1
# GCN-NEXT: DS_WRITE_B32
# GCN-NEXT: DS_WRITE_B32
# GCN: bb.2:
# GCN: $m0 = COPY %2
# GCN-NEXT: SENDMSG
---
name: m0-in-loop-7
registers:
- { id: 0, class: vgpr_32 }
- { id: 1, class: vgpr_32 }
- { id: 2, class: sgpr_32 }
body: |
bb.0.entry:
successors: %bb.1
%0 = IMPLICIT_DEF
%1 = IMPLICIT_DEF
%2 = IMPLICIT_DEF
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.1
bb.1:
successors: %bb.2
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
SI_INIT_M0 -1, implicit-def $m0
DS_WRITE_B32 %0, %1, 0, 0, implicit $m0, implicit $exec
S_BRANCH %bb.2
bb.2:
successors: %bb.3, %bb.1
$m0 = COPY %2:sgpr_32
S_SENDMSG 34, implicit $exec, implicit $m0
S_CBRANCH_VCCZ %bb.1, implicit undef $vcc
S_BRANCH %bb.3
bb.3:
S_ENDPGM 0
...
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