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* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+15
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-15/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* [LICM] Work around LICM needs to maintain state across loops.Davide Italiano2016-12-231-0/+15
The pass creates some state which expects to be cleaned up by a later instance of the same pass. opt-bisect happens to expose this not ideal design because calling skipLoop() will result in this state not being cleaned up at times and an assertion firing in `doFinalization()`. Chandler tells me the new pass manager will give us options to avoid these design traps, but until it's not ready, we need a workaround for the current pass infrastructure. Fix provided by Andy Kaylor, see the review for a complete discussion. Differential Revision: https://reviews.llvm.org/D25848 llvm-svn: 290427
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