[PATCH] D81943: [SROA] Teach SROA to perform no-op pointer conversion.

[Michael Liao via Phabricator via llvm-commits]

hliao created this revision.
hliao added reviewers: arsenm, chandlerc, lebedev.ri.
Herald added subscribers: llvm-commits, hiraditya, wdng.
Herald added a project: LLVM.

- When promoting a pointer from memory to register, SROA skips pointers from different address spaces. However, as `ptrtoint` and `inttoptr` are defined as no-op casts if that integer type has the same as the pointer value, generate the pair of `ptrtoint`/`inttoptr` (no-op cast) sequence to convert pointers from different address spaces if they have the same size.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D81943

Files:
  llvm/lib/Transforms/Scalar/SROA.cpp
  llvm/test/Transforms/SROA/address-spaces.ll
  llvm/test/Transforms/SROA/alloca-address-space.ll

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