[PATCH] D53835: [HotColdSplitting] Use TTI to inform outlining threshold

[Vedant Kumar via Phabricator via llvm-commits]

vsk created this revision.
vsk added reviewers: junbuml, sebpop, hiraditya, tejohnson.

Using TargetTransformInfo allows the splitting pass to factor in the
code size cost of instructions as it decides whether or not outlining is
profitable.

This did not regress the overall amount of outlining seen on the handful
of internal frameworks I tested.

Thanks to Jun Bum Lim for suggesting this!


https://reviews.llvm.org/D53835

Files:
  llvm/lib/Transforms/IPO/HotColdSplitting.cpp
  llvm/test/Transforms/HotColdSplit/outline-expensive.ll

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