| # RUN: llc -o - %s -march=amdgcn -run-pass=si-insert-waitcnts -verify-machineinstrs | FileCheck -check-prefix=GCN %s |
| |
| # Check that the waitcnt propogates info in the case of a single basic block loop |
| |
| # GCN-LABEL: waitcnt-loop-single-basic-block |
| # GCN: bb.0 |
| # GCN: S_WAITCNT 3952 |
| # GCN-NEXT: GLOBAL_STORE_DWORD |
| # GCN: S_WAITCNT 3953 |
| # GCN-NEXT: GLOBAL_STORE_DWORD |
| |
| ... |
| name: waitcnt-loop-single-basic-block |
| body: | |
| bb.0: |
| S_BRANCH %bb.1 |
| bb.1: |
| GLOBAL_STORE_DWORD $vgpr7_vgpr8, $vgpr11, 0, 0, 0, implicit $exec |
| $vgpr21 = GLOBAL_LOAD_DWORD $vgpr4_vgpr5, 0, 0, 0, implicit $exec |
| $vgpr10 = GLOBAL_LOAD_DWORD $vgpr10_vgpr11, 0, 0, 0, implicit $exec |
| GLOBAL_STORE_DWORD $vgpr14_vgpr15, $vgpr21, 0, 0, 0, implicit $exec |
| $vgpr11 = GLOBAL_LOAD_DWORD $vgpr11_vgpr12, 0, 0, 0, implicit $exec |
| S_CBRANCH_SCC1 %bb.1, implicit $scc |
| bb.2: |
| S_ENDPGM |
| ... |
