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Author SHA1 Message Date
Eric Christopher 598198edbc Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358552 91177308-0d34-0410-b5e6-96231b3b80d8
 2019-04-17 04:52:47 +00:00
Eric Christopher 02cc44c1b9 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358546 91177308-0d34-0410-b5e6-96231b3b80d8
 2019-04-17 02:12:23 +00:00
Michael Kuperstein e78d6b0640 [LoopUnroll] First form LCSSA, then loop-simplify 
Running non-LCSSA-preserving LoopSimplify followed by LCSSA on (roughly) the
same loop is incorrect, since LoopSimplify may break LCSSA arbitrarily higher
in the loop nest. Instead, run LCSSA first, and then run LCSSA-preserving
LoopSimplify on the result.

This fixes PR31718.

Differential Revision: https://reviews.llvm.org/D29055


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292854 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-01-23 23:45:42 +00:00