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Ayal Zaks
cbb4ef7bbf
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
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