[PATCH] Add iterator and iterator range to PredIteratorCache

[David Blaikie]

Looks reasonable.

Optional: Rather than having range access as a free function and begin/end as member functions, I'd be inclined to put them at the same level, or possibly even go without begin/end entirely and just have:

  PredCache.predecessors(BB);

(or s/predecessors/cached_predecessors/ - though of course both names are somewhat redundant with the name of the object... - maybe it should just be PredCache.get(BB); or something? )


http://reviews.llvm.org/D9169

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