[PATCH] D152701: LowerMemIntrinsics: Check address space aliasing for memmove expansion

[Matt Arsenault via Phabricator via llvm-commits]

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For cases where we cannot insert an addrspacecast, we can still expand
like a memcpy if we know the address spaces cannot alias. Normally
non-aliasing memmoves are optimized to memcpy, but we cannot rely on
that for lowering. If a target has aliasing address spaces that cannot
be casted between, we still have to give up lowering this.


https://reviews.llvm.org/D152701

Files:
  llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
  llvm/test/CodeGen/AMDGPU/lower-mem-intrinsics.ll

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