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* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+39
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-39/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* Update MemorySSA in SimpleLoopUnswitch.Alina Sbirlea2018-12-041-0/+1
| | | | | | | | | | | Summary: Teach SimpleLoopUnswitch to preserve MemorySSA. Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits Differential Revision: https://reviews.llvm.org/D47022 llvm-svn: 348263
* [LegacyPM] Fix PR37888 by teaching the legacy loop pass manager how toChandler Carruth2018-06-221-0/+38
clear out deleted loops from the current queue beyond just the current loop. This is important because SimpleLoopUnswitch will now enqueue the same loop to be re-processed. When it does this with the legacy PM, we don't have a way of canceling the rest of the pipeline and so we can end up deleting the loop before we reprocess it. =/ This change also makes it easy to support deleting other loops in the queue to process, although I don't have any use cases for that. Differential Revision: https://reviews.llvm.org/D48470 llvm-svn: 335317
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