[PATCH] D18336: Prevent construction of cycle in DAG store merge

[James Y Knight via llvm-commits]

jyknight accepted this revision.
jyknight added a comment.
This revision is now accepted and ready to land.

Thanks, lgtm.

Note for readers: we spent some time going over this, and noted that 1) The original test case was using UseAA mode (which we'd not noticed before) 2) The bug doesn't actually exist in !UseAA, because of the different way it traverses the chain.

So this final version reflects that.


http://reviews.llvm.org/D18336