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4 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
31f18eeb2b Allow for customized graph edge pruning in PostOrderIterator.h 
Make it possible to prune individual graph edges from a post-order
traversal by specializing the po_iterator_storage template. Previously,
it was only possible to prune full graph nodes. Edge pruning makes it
possible to remove loop back-edges, for example.

Also replace the existing DFSetTraits customization hook with a
po_iterator_storage method for observing the post-order. DFSetTraits was
only used by LoopIterator.h which now provides a po_iterator_storage
specialization.

Thanks to Sean and Chandler for reviewing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160366 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-07-17 15:35:40 +00:00
Andrew Trick
d8a2f3ab91 Cleanup. Remove an extraneous GraphTraits specialization. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137264 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-10 22:55:39 +00:00
Andrew Trick
2d31ae3d9d Cleanup. Added LoopBlocksDFS::perform for simple clients. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137195 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-10 01:59:05 +00:00
Andrew Trick
5207936a24 An interface for iterating over a loop's blocks in DFS order. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136838 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-08-03 23:27:28 +00:00