File: waitcnt-no-redundant.mir

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llvm-toolchain-11 1%3A11.0.1-2
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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 3952

...
# CHECK-LABEL: name: waitcnt-no-redundant
# CHECK: S_WAITCNT 3952
# CHECK-NEXT: FLAT_ATOMIC_CMPSWAP
# CHECK-NEXT: S_WAITCNT 3952
# CHECK-NEXT: BUFFER_WBINVL1

name: waitcnt-no-redundant
body: |
  bb.0:
    renamable $vgpr0 = V_MOV_B32_e32 0, implicit $exec

  bb.1:
    S_WAITCNT 3952
    FLAT_ATOMIC_CMPSWAP undef renamable $vgpr0_vgpr1, renamable $vgpr0_vgpr1, 0, 0, implicit $exec, implicit $flat_scr
    S_WAITCNT 3952
    BUFFER_WBINVL1 implicit $exec
    S_BRANCH %bb.1

...