[PATCH] D91589: [DAGCombiner] Fold (sext (not i1 x)) -> (add (zext i1 x), -1)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

@laytonio Please can you rebase? BTW I extended the RISCV tests to include i64 tests as well as i32


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D91589/new/

https://reviews.llvm.org/D91589