[PATCH] D20474: when calculating RegUsages, ignore instructions which are uniformed after vectorization

[Wei Mi via llvm-commits]

wmi updated this revision to Diff 63156.
wmi added a comment.

Fix the problem pointed out by Matthew. When induction var is only used by uniform instruction or non-consecutive/non-gather scatter ptr instructions, the related phi and update will be added into VecValuesToIgnore set.


Repository:
  rL LLVM

http://reviews.llvm.org/D20474

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/PowerPC/vsx-tsvc-s173.ll
  test/Transforms/LoopVectorize/X86/reg-usage.ll
  test/Transforms/LoopVectorize/reverse_induction.ll

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