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 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. 29... 30# CHECK-LABEL: name: waitcnt-no-war-wait 31# CHECK: S_WAITCNT 0 32# CHECK-NEXT: S_BUFFER_LOAD_DWORD_IMM 33# CHECK-NEXT: TBUFFER_STORE_FORMAT_X_OFFEN_exact 34name: waitcnt-no-war-wait 35body: | 36 bb.0: 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, 0, implicit $exec :: (dereferenceable store (s32) into custom "BufferResource", align 1, addrspace 4) 39 40... 41