Bing1 Yu f383c53311 [MachineSink] Compile time improvement for large testcases which has many kill flags ...

We did a experiment and observed dramatic decrease on compilation time which spent on clearing kill flags.
Before:
Number of BasicBlocks:33357
Number of Instructions:162067
Number of Cleared Kill Flags:32869
Time of handling kill flags(ms):1.607509e+05

After:
Number of BasicBlocks:33357
Number of Instructions:162067
Number of Cleared Kill Flags:32869
Time of handling kill flags:3.987371e+03

Reviewed By: MatzeB

Differential Revision: https://reviews.llvm.org/D111688

2021-10-18 15:44:07 +08:00

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