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Commit 8de4f8b1 authored by Hao Liu's avatar Hao Liu
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[LoopVectorize] Induction variables: support arbitrary constant step. 

Previously, only -1 and +1 step values are supported for induction variables. This patch extends LV to support
arbitrary constant steps.
Initial patch by Alexey Volkov. Some bug fixes are added in the following version.

Differential Revision: http://reviews.llvm.org/D6051 and http://reviews.llvm.org/D7193

llvm-svn: 227557
parent 8c969eaf
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