[PATCH] Extend LoopVectorizationLegality::isConsecutivePtr to handle multiple level GEPs

[Wei Mi]

> can't we just use SCEV for checking it? It would be more general, than checking for all operands being 0 etc.


I try that and it seems works. The code looks simpler this way. I havn't done much test. llvm unit test is ok. I will do more testing for it.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D10281

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/pr23580.ll

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