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Author SHA1 Message Date
Florian Hahn 831a757728 [LoopInterchange] Preserve LoopInfo after interchanging. 
LoopInterchange relies on LoopInfo being up-to-date, so we should
preserve it after interchanging. This patch updates restructureLoops to
move the BBs of the interchanged loops to the right place.

Reviewers: davide, efriedma, karthikthecool, mcrosier

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D45278

llvm-svn: 329264
 2018-04-05 09:48:45 +00:00
Florian Hahn b79217077d [LoopInterchange] Update tests so DA can handle access after D35430. 
I have taken the opportunity to simplify some tests slightly and move
parts around.

It also brings back a few IR checks for interchangable loops.

Reviewers: karthikthecool, sebpop, grosser

Reviewed By: sebpop

Differential Revision: https://reviews.llvm.org/D45207

llvm-svn: 329081
 2018-04-03 16:37:58 +00:00