[PATCH] D86651: [MemCpyOpt] Preserve MemorySSA.

[Florian Hahn via Phabricator via llvm-commits]

fhahn updated this revision to Diff 288764.
fhahn added a comment.
Herald added a subscriber: danielkiss.

Fix some bugs in the updating, add test cases.

There is one case where we turn a memmove into a memcpy, which currently is a no-op. We should probably remove the access and re-add it, but I am not sure how to best ensure we re-add the access at the correct position.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D86651/new/

https://reviews.llvm.org/D86651

Files:
  llvm/include/llvm/Transforms/Scalar/MemCpyOptimizer.h
  llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
  llvm/test/Transforms/MemCpyOpt/perserve-memssa.ll

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