[PATCH] D55957: [MemorySSA] Create walker that skips starting access.

[Alina Sbirlea via Phabricator via llvm-commits]

asbirlea created this revision.
asbirlea added a reviewer: george.burgess.iv.
Herald added subscribers: jfb, Prazek, jlebar, sanjoy.

Extends CachingWalker. There's code duplication with the CachingWalker's
getClobbering implementation that I need to address either in this or a
follow-up refactoring patch (feedback welcome).


Repository:
  rL LLVM

https://reviews.llvm.org/D55957

Files:
  include/llvm/Analysis/MemorySSA.h
  lib/Analysis/MemorySSA.cpp

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