[PATCH] D60226: [ThinLTO] Fix ThinLTOCodegenerator to export llvm.used symbols

[Steven Wu via Phabricator via llvm-commits]

steven_wu created this revision.
steven_wu added reviewers: tejohnson, pcc, dexonsmith.
Herald added subscribers: dang, jkorous, hiraditya, eraman, inglorion, mehdi_amini.
Herald added a project: LLVM.

ThinLTOCodeGenerator currently does not preserve llvm.used symbols and
it can internalize them. In order to pass the necessary information to the
legacy ThinLTOCodeGenerator, the input to the code generator is
rewritten to be based on lto::InputFile.

This fixes: PR41236
rdar://problem/49293439


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D60226

Files:
  llvm/include/llvm/LTO/LTO.h
  llvm/include/llvm/LTO/legacy/ThinLTOCodeGenerator.h
  llvm/lib/LTO/LTO.cpp
  llvm/lib/LTO/ThinLTOCodeGenerator.cpp
  llvm/test/LTO/X86/Inputs/thinlto-internalize-used2.ll
  llvm/test/LTO/X86/thinlto-internalize-used.ll
  llvm/tools/llvm-lto/llvm-lto.cpp

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