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1627603e25
Summary: This adds the beginning of an update API to preserve MemorySSA. In particular, this patch adds a way to remove memory SSA accesses when instructions are deleted. It also adds relevant unit testing infrastructure for MemorySSA's API. (There is an actual user of this API, i will make that diff dependent on this one. In practice, a ton of opt passes remove memory instructions, so it's hopefully an obviously useful API :P) Reviewers: hfinkel, reames, george.burgess.iv Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D17157 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262362 91177308-0d34-0410-b5e6-96231b3b80d8