1 # RUN: llc -mtriple=amdgcn -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck %s
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
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
13 name: waitcnt-no-redundant
16 renamable $vgpr0 = V_MOV_B32_e32 0, implicit $exec
20 FLAT_ATOMIC_CMPSWAP undef renamable $vgpr0_vgpr1, renamable $vgpr0_vgpr1, 0, 0, implicit $exec, implicit $flat_scr
22 BUFFER_WBINVL1 implicit $exec
27 # Check that the waitcnt pass does *not* insert a waitcnt inst after S_BUFFER_LOAD.
28 # WAR hazard does not apply here, because S_BUFFER_LOAD accesses invariant memory.
30 # CHECK-LABEL: name: waitcnt-no-war-wait
32 # CHECK-NEXT: S_BUFFER_LOAD_DWORD_IMM
33 # CHECK-NEXT: TBUFFER_STORE_FORMAT_X_OFFEN_exact
34 name: waitcnt-no-war-wait
37 renamable $sgpr8 = S_BUFFER_LOAD_DWORD_IMM renamable $sgpr0_sgpr1_sgpr2_sgpr3, 276, 0 :: (dereferenceable invariant load (s32))
38 TBUFFER_STORE_FORMAT_X_OFFEN_exact killed renamable $vgpr0, renamable $vgpr15, renamable $sgpr4_sgpr5_sgpr6_sgpr7, renamable $sgpr9, 0, 116, 1, 0, implicit $exec :: (dereferenceable store (s32), align 1, addrspace 7)