[PATCH] D31175: Improve TargetTransformInfo::getCFInstrCost()

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa updated this revision to Diff 92943.
jonpa added a comment.

I tried to handle the three cases per your suggestions.

It seems right to model the extract+scalar compare cost as extraction overhead of a vector of i1. This way, a target can define the i1 extractions to cost (which for SystemZ is 2). This also works well with the CostModel.


https://reviews.llvm.org/D31175

Files:
  lib/Target/SystemZ/SystemZTargetTransformInfo.cpp
  lib/Transforms/Vectorize/LoopVectorize.cpp
  test/Analysis/CostModel/SystemZ/branch-predicated-vectorized-block.ll

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