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| author | Hans Wennborg <hans@hanshq.net> | 2018-09-27 09:59:27 +0000 |
|---|---|---|
| committer | Hans Wennborg <hans@hanshq.net> | 2018-09-27 09:59:27 +0000 |
| commit | 5008d9014b073d5373cee165d1555727977c7a1a (patch) | |
| tree | 72071d9d4606916794a646c5387bb6c9b241f019 /llvm/lib/CodeGen/MachineOperand.cpp | |
| parent | 70ac019efa13010ee2b76a3dd351a92e961c3d51 (diff) | |
| download | bcm5719-llvm-5008d9014b073d5373cee165d1555727977c7a1a.tar.gz bcm5719-llvm-5008d9014b073d5373cee165d1555727977c7a1a.zip | |
Revert r342942 "[MachineCopyPropagation] Reimplement CopyTracker in terms of register units"
It seems to have broken several targets, see comments on the llvm-commits thread.
> Change the copy tracker to keep a single map of register units instead
> of 3 maps of registers. This gives a very significant compile time
> performance improvement to the pass. I measured a 30-40% decrease in
> time spent in MCP on x86 and AArch64 and much more significant
> improvements on out of tree targets with more registers.
>
> Differential Revision: https://reviews.llvm.org/D52374
llvm-svn: 343189
Diffstat (limited to 'llvm/lib/CodeGen/MachineOperand.cpp')
0 files changed, 0 insertions, 0 deletions
