llvm/test/CodeGen/AMDGPU/waitcnt-loop-single-basic-block.mir

   1 # RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=si-insert-waitcnts -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s
   2
   3 # Check that the waitcnt propogates info in the case of a single basic block loop
   4
   5 # GCN-LABEL: waitcnt-loop-single-basic-block
   6 # GCN: bb.0
   7 # GCN: S_WAITCNT 3952
   8 # GCN-NEXT: GLOBAL_STORE_DWORD
   9 # GCN: S_WAITCNT 3953
  10 # GCN-NEXT: GLOBAL_STORE_DWORD
  11
  12 ...
  13 name: waitcnt-loop-single-basic-block
  14 body: |
  15   bb.0:
  16     S_BRANCH %bb.1
  17   bb.1:
  18     GLOBAL_STORE_DWORD $vgpr7_vgpr8, $vgpr11, 0, 0, implicit $exec
  19     $vgpr21 = GLOBAL_LOAD_DWORD $vgpr4_vgpr5, 0, 0, implicit $exec
  20     $vgpr10 = GLOBAL_LOAD_DWORD $vgpr10_vgpr11, 0, 0, implicit $exec
  21     GLOBAL_STORE_DWORD $vgpr14_vgpr15, $vgpr21, 0, 0, implicit $exec
  22     $vgpr11 = GLOBAL_LOAD_DWORD $vgpr11_vgpr12, 0, 0, implicit $exec
  23     S_CBRANCH_SCC1 %bb.1, implicit $scc
  24   bb.2:
  25     S_ENDPGM 0
  26 ...