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Author SHA1 Message Date
Michael Kuperstein 3ca147ea3d Preserve loop metadata when folding branches to a common destination. 
Differential Revision: https://reviews.llvm.org/D27830

llvm-svn: 289992
 2016-12-16 21:23:59 +00:00
Florian Hahn 77382be56b [simplifycfg][loop-simplify] Preserve loop metadata in 2 transformations. 
insertUniqueBackedgeBlock in lib/Transforms/Utils/LoopSimplify.cpp now
propagates existing llvm.loop metadata to newly the added backedge.

llvm::TryToSimplifyUncondBranchFromEmptyBlock in lib/Transforms/Utils/Local.cpp
now propagates existing llvm.loop metadata to the branch instructions in the
predecessor blocks of the empty block that is removed.

Differential Revision: https://reviews.llvm.org/D26495

llvm-svn: 287341
 2016-11-18 13:12:07 +00:00