[PATCH] During PHI elimination, split critical edges that move copies out of loops

[Daniel Jasper]

Not sure what that means. I think the changes here by itself are good, but they lead to worse behavior in later passes, specifically register coalescing. I'll take a look at whether the register coalescer heuristic can be tweaked in a simple way to avoid this regression.


http://reviews.llvm.org/D8016

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