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Author SHA1 Message Date
Eric Christopher cee313d288 Revert "Temporarily Revert "Add basic loop fusion pass."" 
The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552
 2019-04-17 04:52:47 +00:00
Eric Christopher a863435128 Temporarily Revert "Add basic loop fusion pass." 
As it's causing some bot failures (and per request from kbarton).

This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.

llvm-svn: 358546
 2019-04-17 02:12:23 +00:00
Alina Sbirlea a496143c9e Update MemorySSA in LoopUnswitch. 
Summary:
Update MemorySSA in old LoopUnswitch pass.
Actual dependency and update is disabled by default.

Subscribers: sanjoy, jlebar, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D45301

llvm-svn: 341984
 2018-09-11 19:19:21 +00:00
Xin Tong ec6f90bec9 LoopUnswitch - Simplify based on known not to a be constant. 
Summary: In case we do not know what the condition is in an unswitched loop, but we know its definitely NOT a known constant. We can perform simplifcations based on this information.

Reviewers: sanjoy, hfinkel, chenli, efriedma

Reviewed By: efriedma

Subscribers: david2050, llvm-commits, mzolotukhin

Differential Revision: https://reviews.llvm.org/D28968

llvm-svn: 296041
 2017-02-23 23:42:19 +00:00