[PATCH] D104579: [SampleFDO] Add two passes of MIRAddFSDiscriminatorsPass

[Wei Mi via Phabricator via llvm-commits]

wmi added a comment.

> This extra pass turns to be positive in performance -- I'm seeing additional 0.6% - 0.8% improvement.

That is a good improvement. I guess the improvement is because regalloc is profile sensitive and it is benefited from preciser fs profile information after you insert another pass of profile loading before regalloc?


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  https://reviews.llvm.org/D104579/new/

https://reviews.llvm.org/D104579