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| author | Jakub Kuderski <kubakuderski@gmail.com> | 2017-07-12 18:42:16 +0000 |
|---|---|---|
| committer | Jakub Kuderski <kubakuderski@gmail.com> | 2017-07-12 18:42:16 +0000 |
| commit | b323f4f173710c60bcc76628d8155e476023c5b5 (patch) | |
| tree | 56e0c010a71bfe43ec9796ba32bd90ff47f30fe0 /llvm/lib/Support/DynamicLibrary.cpp | |
| parent | 5ae1bfe813126dc68fe1b9f572d0bd59d481feca (diff) | |
| download | llvm-b323f4f173710c60bcc76628d8155e476023c5b5.zip llvm-b323f4f173710c60bcc76628d8155e476023c5b5.tar.gz llvm-b323f4f173710c60bcc76628d8155e476023c5b5.tar.bz2 | |
[LoopRotate] Fix DomTree update logic for unreachable nodes. Fix PR33701.
Summary:
LoopRotate manually updates the DoomTree by iterating over all predecessors of a basic block and computing the Nearest Common Dominator.
When a predecessor happens to be unreachable, `DT.findNearestCommonDominator` returns nullptr.
This patch teaches LoopRotate to handle this case and fixes [[ https://bugs.llvm.org/show_bug.cgi?id=33701 | PR33701 ]].
In the future, LoopRotate should be taught to use the new incremental API for updating the DomTree.
Reviewers: dberlin, davide, uabelho, grosser
Subscribers: efriedma, mzolotukhin
Differential Revision: https://reviews.llvm.org/D35074
llvm-svn: 307828
Diffstat (limited to 'llvm/lib/Support/DynamicLibrary.cpp')
0 files changed, 0 insertions, 0 deletions