Justin Bogner 981eb59138 Path: Stop claiming path::const_iterator is bidirectional ... path::const_iterator claims that it's a bidirectional iterator, but it doesn't satisfy all of the contracts for a bidirectional iterator. For example, n3376 24.2.5 p6 says "If a and b are both dereferenceable, then a == b if and only if *a and *b are bound to the same object", but this doesn't work with how we stash and recreate Components. This means that our use of reverse_iterator on this type is invalid and leads to many of the valgrind errors we're hitting, as explained by Tilmann Scheller here: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20140728/228654.html Instead, we admit that path::const_iterator is only an input_iterator, and implement a second input_iterator for path::reverse_iterator (by changing const_iterator::operator-- to reverse_iterator::operator++). All of the uses of this just traverse once over the path in one direction or the other anyway. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214737 91177308-0d34-0410-b5e6-96231b3b80d8		2014-08-04 17:36:41 +00:00
..
llvm	Path: Stop claiming path::const_iterator is bidirectional	2014-08-04 17:36:41 +00:00
llvm-c	[LLVM-C] Add LLVM{IsConstantString,GetAsString,GetElementAsConstant}.	2014-08-03 23:54:16 +00:00