[PATCH] D152577: Part 2 of Fine tune MachineFunctionSplitPass (MFS) for FSAFDO.

[Han Shen via Phabricator via llvm-commits]

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This is a follow up to D152399 <https://reviews.llvm.org/D152399>.

This CL adds a new discriminator pass. Also adds a new sample profile pass when MFS is enabled.

Also includes tests for both FSAFDO-MFS and FSADO pass config.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152577

Files:
  llvm/lib/CodeGen/TargetPassConfig.cpp
  llvm/test/CodeGen/X86/Inputs/fsloader-mfs.afdo
  llvm/test/CodeGen/X86/load-sample-profile.ll
  llvm/test/CodeGen/X86/machine-function-splitter-fsafdo.ll

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