[PATCH] D31567: MemorySSA: Add support for caching clobbering access in stores

[Daniel Berlin via Phabricator via llvm-commits]

dberlin created this revision.
Herald added a subscriber: Prazek.

This enables us to cache the clobbering access for stores, despite the
fact that we can't rewrite the use-def chains themselves.

Early testing shows that, after this change, for larger testcases, it will be a significant net positive (memory and time) to remove the walker caching.


https://reviews.llvm.org/D31567

Files:
  include/llvm/Transforms/Utils/MemorySSA.h
  lib/Transforms/Utils/MemorySSA.cpp

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