[PATCH] D156633: [InstSimplify] Add some basic simplifications for `llvm.ptrmask`

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n created this revision.
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Mostly the same as `and`. We also have a check for a useless
`llvm.ptrmask` if the ptr is already known aligned.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D156633

Files:
  llvm/lib/Analysis/InstructionSimplify.cpp
  llvm/test/Transforms/InferAddressSpaces/AMDGPU/ptrmask.ll
  llvm/test/Transforms/InstCombine/align-addr.ll
  llvm/test/Transforms/InstSimplify/ptrmask.ll

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