Merging r277783 and r278156 to unbreak Clang on the branch after r278674

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r277783 | timshen | 2016-08-04 16:03:44 -0700 (Thu, 04 Aug 2016) | 9 lines

[ADT] Migrate DepthFirstIterator to use NodeRef

Summary: The corresponding LLVM change is D23146.

Reviewers: dblaikie, chandlerc

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D23147
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r278156 | timshen | 2016-08-09 13:22:55 -0700 (Tue, 09 Aug 2016) | 16 lines

[ADT] Change iterator_adaptor_base's default template arguments to forward more underlying typedefs

Summary:
The corresponding LLVM change: D23217.

LazyVector::iterator breaks, because int isn't an iterator type.
Since iterator_adaptor_base shouldn't be blamed to break at the call to
iterator_traits<int>::xxx, I'd rather "fix" LazyVector::iterator.

The perfect solution is to model "relative pointer", but it's beyond the goal of this patch.

Reviewers: chandlerc, bkramer

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D23218
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_39@278678 91177308-0d34-0410-b5e6-96231b3b80d8