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Author SHA1 Message Date
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
Wei Mi ebb9327759 [LoopUnswitch] Fix a simple bug which disables loop unswitch for select statement 
This is to fix PR34257. rL309059 takes an early return when FindLIVLoopCondition
fails to find a loop invariant condition. This is wrong and it will disable loop
unswitch for select. The patch fixes the bug.

Differential Revision: https://reviews.llvm.org/D36985

llvm-svn: 312045
 2017-08-29 21:45:11 +00:00