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archived-llvm/test/Transforms/LoopVectorize
Ayal Zaks cbb4ef7bbf [LV] Fold tail by masking - handle reductions
Allow vectorizing loops that have reductions when tail is folded by masking.
A select is introduced in VPlan, choosing between the last value carried by the
loop-exit/live-out instruction of the reduction, and the penultimate value
carried by the reduction phi, according to the "i < n" mask of fold-tail.
This select replaces the last value as the live-out value of the loop.

Differential Revision: https://reviews.llvm.org/D66720

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370173 91177308-0d34-0410-b5e6-96231b3b80d8
2019-08-28 09:02:23 +00:00
..
2019-04-25 04:49:48 +00:00