diff options
| author | Mark Searles <m.c.searles@gmail.com> | 2018-03-14 22:04:32 +0000 |
|---|---|---|
| committer | Mark Searles <m.c.searles@gmail.com> | 2018-03-14 22:04:32 +0000 |
| commit | c3c02bde7355d08e250081c15a53375cbbf2415f (patch) | |
| tree | 33a79cdd746b5c274b6ced8187045fae2e9ce715 /llvm/test/CodeGen/AMDGPU | |
| parent | dfeebdbed7719a11bd672ebda74c7f37837ffa05 (diff) | |
| download | bcm5719-llvm-c3c02bde7355d08e250081c15a53375cbbf2415f.tar.gz bcm5719-llvm-c3c02bde7355d08e250081c15a53375cbbf2415f.zip | |
[AMDGPU] Waitcnt pass: Modify the waitcnt pass to propagate info in the case of a single basic block loop. mergeInputScoreBrackets() does this for us; update it so that it processes the single bb's score bracket when processing the single bb's preds. It is, after all, a pred of itself, so it's score bracket is needed.
Differential Revision: https://reviews.llvm.org/D44434
llvm-svn: 327583
Diffstat (limited to 'llvm/test/CodeGen/AMDGPU')
| -rw-r--r-- | llvm/test/CodeGen/AMDGPU/waitcnt-loop-single-basic-block.mir | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/waitcnt-loop-single-basic-block.mir b/llvm/test/CodeGen/AMDGPU/waitcnt-loop-single-basic-block.mir new file mode 100644 index 00000000000..1067d4775c5 --- /dev/null +++ b/llvm/test/CodeGen/AMDGPU/waitcnt-loop-single-basic-block.mir @@ -0,0 +1,26 @@ +# 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 +... |
