Duncan P. N. Exon Smith a848c47130 ADT: Stop using getNodePtrUnchecked on end() iterators ...

Stop using `getNodePtrUnchecked()` when building IR.  Eventually a
dereference will be required to get at the downcast node, since the
iterator will only store an `ilist_node_base` of some sort.

This should have no functionality change for now, but is a path towards
removing some more UB from ilist.

llvm-svn: 261495

2016-02-21 19:52:15 +00:00

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