[PATCH] D150769: [SelectionDAG][computeKnownBits]: Move ISD::ADD/ISD::SUB into their own cases

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I have a patch that removes the code from SetPromotedInteger, preserves FMF for setcc, and preserves nuw/nsw when promoting add/sub if the promoted value happens to be sign/zero extended according to computeKnownBits/ComputeNumSignBits. This avoids all of the test changes from removing the code in SetPromotedInteger.

I'll break it into 2 parts, SetPromotedInteger and preserving FMF in one part. nuw/nsw preserving in the second part.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D150769/new/

https://reviews.llvm.org/D150769