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Author SHA1 Message Date
Alina Sbirlea ad4d018202 Update MemorySSA in LoopRotate. 
Summary:
Teach LoopRotate to preserve MemorySSA.
Enable tests for correctness, dependency disabled by default.

Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits

Differential Revision: https://reviews.llvm.org/D51718

llvm-svn: 345216
 2018-10-24 22:46:45 +00:00
Andrew Kaylor d49711996f Restrict the definition of loop preheader to avoid EH blocks 
Differential Revision: https://reviews.llvm.org/D34487

llvm-svn: 306070
 2017-06-22 23:27:16 +00:00