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| author | Alexander Timofeev <Alexander.Timofeev@amd.com> | 2017-11-10 12:21:10 +0000 |
|---|---|---|
| committer | Alexander Timofeev <Alexander.Timofeev@amd.com> | 2017-11-10 12:21:10 +0000 |
| commit | 28da06778fb1f91f6fe854d034d75cc44a817d94 (patch) | |
| tree | 259c74f17f0b8b91f94bbf6b6c26208268342b38 /llvm/test/CodeGen | |
| parent | 13cc995c3d7ce55326f255718ee1f09fb4ca8bbb (diff) | |
| download | bcm5719-llvm-28da06778fb1f91f6fe854d034d75cc44a817d94.tar.gz bcm5719-llvm-28da06778fb1f91f6fe854d034d75cc44a817d94.zip | |
[AMDGPU] Prevent Machine Copy Propagation from replacing live copy with the dead one
Differential revision: https://reviews.llvm.org/D38754
llvm-svn: 317884
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/AMDGPU/dead_copy.mir | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AMDGPU/dead_copy.mir b/llvm/test/CodeGen/AMDGPU/dead_copy.mir new file mode 100644 index 00000000000..d581b29a195 --- /dev/null +++ b/llvm/test/CodeGen/AMDGPU/dead_copy.mir @@ -0,0 +1,27 @@ +# RUN: llc -o - %s -march=amdgcn -mcpu=fiji -run-pass=machine-cp -verify-machineinstrs | FileCheck -check-prefix=GCN %s + +# GCN-LABEL: dead_copy +# GCN: bb.0 +# GCN-NOT: dead %vgpr5 = COPY undef %vgpr11, implicit %exec +# GCN: %vgpr5 = COPY %vgpr11, implicit %exec + +--- +name: dead_copy + +body: | + + bb.0: + liveins: %vgpr11, %sgpr0, %sgpr1, %vgpr6, %vgpr7, %vgpr4 + + dead %vgpr5 = COPY undef %vgpr11, implicit %exec + + %vgpr5 = COPY %vgpr11, implicit %exec + + %sgpr14 = S_ADD_U32 %sgpr0, target-flags(amdgpu-gotprel) 1136, implicit-def %scc + %sgpr15 = S_ADDC_U32 %sgpr1, target-flags(amdgpu-gotprel32-lo) 0, implicit-def dead %scc, implicit %scc + + %vgpr10 = COPY killed %sgpr14, implicit %exec + %vgpr11 = COPY killed %sgpr15, implicit %exec + + FLAT_STORE_DWORDX4 %vgpr10_vgpr11, %vgpr4_vgpr5_vgpr6_vgpr7, 0, 0, 0, implicit %exec, implicit %flat_scr +... |
