[PATCH] D47942: [SmallSet] Add SmallSetIterator.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: dblaikie, craig.topper.
Herald added a subscriber: mgrang.
fhahn added a dependency: D47940: [SmallSet] Add some simple unit tests..
fhahn added a dependent revision: D46827: [VPlan] Add VPInstruction to VPRecipe transformation..

This patch adds a simple const_iterator implementation for SmallSet by
delegating to either a SmallVector::const_iterator or
std::set::const_iterator, depending on which storage is used by the
SmallSet.

The motivation for adding this is https://reviews.llvm.org/D46827, where it is helpful to iterate 
over a SmallSet.


https://reviews.llvm.org/D47942

Files:
  include/llvm/ADT/SmallSet.h
  unittests/ADT/SmallSetTest.cpp

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