[PATCH] D55153: [ThinLTO] Implement index-based WPD

[Teresa Johnson via Phabricator via llvm-commits]

tejohnson created this revision.
tejohnson added a reviewer: pcc.
Herald added subscribers: dang, arphaman, dexonsmith, steven_wu, eraman, inglorion, mehdi_amini.

This patch adds support to the WholeProgramDevirt pass to perform
index-based WPD, which is invoked from ThinLTO during the thin link.

The ThinLTO backend (WPD import phase) behaves the same regardless of
whether the WPD decisions were made with the index-based or (the
existing) IR-based analysis.

Depends on D54815 <https://reviews.llvm.org/D54815>.


Repository:
  rL LLVM

https://reviews.llvm.org/D55153

Files:
  include/llvm/IR/ModuleSummaryIndex.h
  include/llvm/Transforms/IPO/WholeProgramDevirt.h
  lib/LTO/LTO.cpp
  lib/Transforms/IPO/WholeProgramDevirt.cpp
  test/ThinLTO/X86/cfi-devirt.ll
  test/ThinLTO/X86/devirt.ll
  test/ThinLTO/X86/nodevirt-nonpromoted-typeid.ll

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