[PATCH] D149800: [WIP][PGO] Add ability to mark cold functions as optsize/minsize/optnone

[Teresa Johnson via Phabricator via cfe-commits]

tejohnson added a subscriber: yamauchi.
tejohnson added a comment.

Previously @yamauchi did a bunch of work related to this called PGSO (Profile Guided Size Optimization). See the functions in https://github.com/llvm-mirror/llvm/blob/master/lib/Transforms/Utils/SizeOpts.cpp, which are used to guide a number of optimizations that can affect code size. Do you know why those weren't sufficient?

@davidxl may remember the details, but iirc fully using minsize/optnone for cold funcs might have been too big of a hammer performance-wise.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D149800/new/

https://reviews.llvm.org/D149800