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| author | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2018-11-12 18:48:17 +0000 |
|---|---|---|
| committer | Stanislav Mekhanoshin <Stanislav.Mekhanoshin@amd.com> | 2018-11-12 18:48:17 +0000 |
| commit | e86c8d33b1d3eacaa616e3d8a6c99638cbe3f9e3 (patch) | |
| tree | d2eebd4b195751f663b78768206a66df0bfd8c41 /lldb/source/Utility/DataBufferLLVM.cpp | |
| parent | 8512e5909e1e5bd996e88e96df9ed572b6016f2e (diff) | |
| download | bcm5719-llvm-e86c8d33b1d3eacaa616e3d8a6c99638cbe3f9e3.tar.gz bcm5719-llvm-e86c8d33b1d3eacaa616e3d8a6c99638cbe3f9e3.zip | |
[AMDGPU] Optimize S_CBRANCH_VCC[N]Z -> S_CBRANCH_EXEC[N]Z
Sometimes after basic block placement we end up with a code like:
sreg = s_mov_b64 -1
vcc = s_and_b64 exec, sreg
s_cbranch_vccz
This happens as a join of a block assigning -1 to a saved mask and
another block which consumes that saved mask with s_and_b64 and a
branch.
This is essentially a single s_cbranch_execz instruction when moved
into a single new basic block.
Differential Revision: https://reviews.llvm.org/D54164
llvm-svn: 346690
Diffstat (limited to 'lldb/source/Utility/DataBufferLLVM.cpp')
0 files changed, 0 insertions, 0 deletions
