[PATCH] D22456: [X86][SSE] Add cost model values for CTPOP of vectors

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: mkuper, ab, silvas, spatel, andreadb.
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This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better.

Repository:
  rL LLVM

https://reviews.llvm.org/D22456

Files:
  lib/Target/X86/X86TargetTransformInfo.cpp
  test/Analysis/CostModel/X86/ctbits-cost.ll
  test/Transforms/SLPVectorizer/X86/ctpop.ll

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