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# RUN: llc -mtriple=amdgcn -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck %s
# Check that the waitcnt pass does *not* insert a redundant waitcnt instr.
# In this testcase, ensure that pass does not insert redundant S_WAITCNT 127
# or S_WAITCNT 3952
...
# CHECK-LABEL: name: waitcnt-no-redundant
# CHECK: DS_READ_B64
# CHECK-NEXT: S_WAITCNT 127
# CHECK-NEXT: FLAT_ATOMIC_CMPSWAP
# CHECK-NEXT: S_WAITCNT 3952
# CHECK-NEXT: BUFFER_WBINVL1_VOL
name: waitcnt-no-redundant
body: |
bb.0:
renamable $vgpr0_vgpr1 = DS_READ_B64 killed renamable $vgpr0, 0, 0, implicit $m0, implicit $exec
S_WAITCNT 127
FLAT_ATOMIC_CMPSWAP killed renamable $vgpr0_vgpr1, killed renamable $vgpr3_vgpr4, 0, 0, implicit $exec, implicit $flat_scr
S_WAITCNT 3952
BUFFER_WBINVL1_VOL implicit $exec
S_ENDPGM
...
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