[PATCH] D110488: [InstCombine] Fold ctpop((x & -x ) - 1) -> cttz(x, false) (PR51784)
Simon Pilgrim via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sat Sep 25 13:20:32 PDT 2021
RKSimon added a comment.
An alternative would be to decide if (~x & (x - 1)) or ((x & -x ) - 1) should be the canonical pattern?
https://alive2.llvm.org/ce/z/WA_cmX
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rG LLVM Github Monorepo
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https://reviews.llvm.org/D110488/new/
https://reviews.llvm.org/D110488
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