[PATCH] D149421: [KnownBits] Improve `KnownBits::rem(X, Y)` in cases where we can deduce low-bits of output

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n added inline comments.


================
Comment at: llvm/lib/Support/KnownBits.cpp:549
 
+static KnownBits remGetLowBits(const KnownBits &Known, const KnownBits &LHS,
+                               const KnownBits &RHS) {
----------------
RKSimon wrote:
> Do we need Known?
Yeah. We don't have a "merge" function (to take known results from A and apply them to B).
There was a bit of conversation below (around L580) about it.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D149421/new/

https://reviews.llvm.org/D149421