[PATCH] D156637: [InstCombine] Implement `SimplifyDemandedBits` for `llvm.ptrmask`

[Noah Goldstein via Phabricator via llvm-commits]

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Logic basically copies 'and' but we can't return a constant if the
result == `rhs` (mask) so that case is skipped.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D156637

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/lib/Transforms/InstCombine/InstCombineInternal.h
  llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
  llvm/test/Transforms/InstCombine/align-addr.ll
  llvm/test/Transforms/InstCombine/consecutive-ptrmask.ll
  llvm/test/Transforms/InstCombine/ptrmask.ll

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