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* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+31
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-31/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* PR9420; an instruction before an unreachable is guaranteed not to have anyEli Friedman2011-03-091-0/+31
reachable uses, but there still might be uses in dead blocks. Use the standard solution of replacing all the uses with undef. This is a rare case because it's very sensitive to phase ordering in SimplifyCFG. llvm-svn: 127299
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