Jakub Kuderski 8f78266b9f [Dominators] Teach LoopDeletion to use the new incremental API ... Summary: This patch makes LoopDeletion use the incremental DominatorTree API. We modify LoopDeletion to perform the deletion in 5 steps: 1. Create a new dummy edge from the preheader to the exit, by adding a conditional branch. 2. Inform the DomTree about the new edge. 3. Remove the conditional branch and replace it with an unconditional edge to the exit. This removes the edge to the loop header, making it unreachable. 4. Inform the DomTree about the deleted edge. 5. Remove the unreachable block from the function. Creating the dummy conditional branch is necessary to perform incremental DomTree update. We should consider using the batch updater when it's ready. Reviewers: dberlin, davide, grosser, sanjoy Reviewed By: dberlin, grosser Subscribers: mzolotukhin, llvm-commits Differential Revision: https://reviews.llvm.org/D35391 llvm-svn: 309850		2017-08-02 18:17:52 +00:00
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2007-07-23-InfiniteLoop.ll
2008-05-06-Phi.ll
2011-06-21-phioperands.ll
2017-07-11-incremental-dt.ll	[Dominators] Teach LoopDeletion to use the new incremental API	2017-08-02 18:17:52 +00:00
dcetest.ll
invalidation.ll	[PM] Teach LoopDeletion to correctly update the LPM when loops are	2017-01-18 02:41:26 +00:00
multiple-exit-conditions.ll	[PM] Teach LoopDeletion to correctly update the LPM when loops are	2017-01-18 02:41:26 +00:00
multiple-exits.ll	[PM] Teach LoopDeletion to correctly update the LPM when loops are	2017-01-18 02:41:26 +00:00
simplify-then-delete.ll
unreachable-loops.ll	[LoopDeletion] Update exits correctly when multiple duplicate edges from an exiting block	2017-06-22 20:20:56 +00:00
update-scev.ll