| # 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 |
| |
| ... |
