1# RUN: llc -mtriple=amdgcn -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck %s
2
3# Check that the waitcnt pass does *not* insert a redundant waitcnt instr.
4# In this testcase, ensure that pass does not insert redundant S_WAITCNT 3952
5
6...
7# CHECK-LABEL: name: waitcnt-no-redundant
8# CHECK: S_WAITCNT 3952
9# CHECK-NEXT: FLAT_ATOMIC_CMPSWAP
10# CHECK-NEXT: S_WAITCNT 3952
11# CHECK-NEXT: BUFFER_WBINVL1
12
13name: waitcnt-no-redundant
14body: |
15  bb.0:
16    renamable $vgpr0 = V_MOV_B32_e32 0, implicit $exec
17
18  bb.1:
19    S_WAITCNT 3952
20    FLAT_ATOMIC_CMPSWAP undef renamable $vgpr0_vgpr1, renamable $vgpr0_vgpr1, 0, 0, implicit $exec, implicit $flat_scr
21    S_WAITCNT 3952
22    BUFFER_WBINVL1 implicit $exec
23    S_BRANCH %bb.1
24
25...
26