[PATCH] D75801: [InstCombine] Remove known bits constant folding (WIP)

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Rebase this after fixes (if any) have landed?

> This is the most expensive individual part of InstCombine.

That is an interesting statement.
It would be good to have some perf numbers here.

Do we do this fold somewhere else in the pipeline?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D75801/new/

https://reviews.llvm.org/D75801