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

[Wei Mi via llvm-commits]

wmi updated this revision to Diff 61442.
wmi added a comment.

Add nonconsecutive pointer values and their dependency into the uniform after vectorization set in collectLoopUniforms if gather/scatter is not supported.  The related code in collectValuesToIgnore is removed.

The added test hoo is to ensure the ptr of the load for which gather is possible will not be added into VecValuesToIgnore set.


Repository:
  rL LLVM

http://reviews.llvm.org/D20474

Files:
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Transforms/LoopVectorize/X86/reg-usage.ll

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