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| author | Pengxuan Zheng <pzheng@quicinc.com> | 2022-09-15 17:52:46 -0700 |
|---|---|---|
| committer | Pengxuan Zheng <pzheng@quicinc.com> | 2022-09-16 13:35:17 -0700 |
| commit | 59365f33e27b24b6ecc971c53889c8ac3b34b15d (patch) | |
| tree | 5d277a851d97a44c67251437c5d61f86aed7d270 /bolt/lib/Rewrite/ExecutableFileMemoryManager.cpp | |
| parent | 1121eca685a39c1fc370daa65ff918a3cd490dc4 (diff) | |
| download | llvm-59365f33e27b24b6ecc971c53889c8ac3b34b15d.zip llvm-59365f33e27b24b6ecc971c53889c8ac3b34b15d.tar.gz llvm-59365f33e27b24b6ecc971c53889c8ac3b34b15d.tar.bz2 | |
[MachineCSE] Add a threshold to avoid spending too much time in isProfitableToCSE
Currently, it can become extremely costly to compute MayIncreasePressure if the
size of CSUses turns out to be very large. In that case, it's no longer cost
effective to keep computing MayIncreasePressure. Therefore, to limit the amount
of time spent in isProfitableToCSE, we simply conservatively assume
MayIncreasePressure if the size of CSUses is too large. This can reduce overall
compile time by 30% for some benchmarks.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D134003
Diffstat (limited to 'bolt/lib/Rewrite/ExecutableFileMemoryManager.cpp')
0 files changed, 0 insertions, 0 deletions