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* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+40
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-40/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* [SimplifyCFG] Do not blindly remove unreachable blocksDavid Majnemer2016-02-241-0/+40
DeleteDeadBlock was called indiscriminately, leading to cleanuprets with undef cleanuppad references. Instead, try to drain the BB of most of it's instructions if it is unreachable. We can then remove the BB if it solely consists of a terminator (and maybe some phis). llvm-svn: 261731
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