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* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+33
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-33/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* Fix PR25372 - teach replaceCongruentPHIs to handle cases where SE evaluates ↵Silviu Baranga2015-11-031-0/+33
a PHI to a SCEVConstant Summary: Since now Scalar Evolution can create non-add rec expressions for PHI nodes, it can also create SCEVConstant expressions. This will confuse replaceCongruentPHIs, which previously relied on the fact that SCEV could not produce constants in this case. We will now replace the node with a constant in these cases - or avoid processing the Phi in case of a type mismatch. Reviewers: sanjoy Subscribers: llvm-commits, majnemer Differential Revision: http://reviews.llvm.org/D14230 llvm-svn: 251938
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