[PATCH] D106440: [IROutliner] Change Prioritization of Outlining to honor cost model

[Andrew Litteken via Phabricator via llvm-commits]

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Currently, the IROutliner uses a simple metric to outline the largest amount of IR possible to outline first if it fits the cost model.  This is model loses out on smaller blocks of code that have higher reductions in cost that are contained within larger blocks of IR.

This reverses the order, where we calculate all of the costs first, and then reorder and extract items based on the calculated results.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106440

Files:
  llvm/include/llvm/Transforms/IPO/IROutliner.h
  llvm/lib/Transforms/IPO/IROutliner.cpp
  llvm/test/Transforms/IROutliner/opt-remarks.ll
  llvm/test/Transforms/IROutliner/outlining-bitcasts.ll

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