[PATCH] D157800: [ValueTracking] Improve analysis of knownbits from incoming phi edges.

[Noah Goldstein via Phabricator via llvm-commits]

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Just fill in missing cases (TODO) for `ugt`, `uge`, `sgt`, `sge`,
`slt`, and `sle`. These are all in the same spirit as `ult`/`uge`, but
each of the other conditions have different constraints.

Proofs: https://alive2.llvm.org/ce/z/gnj4o-


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157800

Files:
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/test/Analysis/ValueTracking/phi-known-bits.ll

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