[PATCH] D12475: [LV] Pull creation of trip counts into a helper function.

[James Molloy via llvm-commits]

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... and do a tad of tidyup while we're at it. Because StartIdx must now be zero, there's no difference between Count and EndIdx.

Moving this to helper functions reduces the complexity of createEmptyLoop.

Repository:
  rL LLVM

http://reviews.llvm.org/D12475

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

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