[PATCH] D102824: [OpenMP] Internalize functions in OpenMPOpt to improve IPO passes

[Joseph Huber via Phabricator via llvm-commits]

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Currently the attributor needs to give up if a function has external linkage.
This means that the optimization introduced in D97818 <https://reviews.llvm.org/D97818> will only apply to static
functions. This change uses the Attributor to internalize OpenMP device
routines by making a copy of each function with private linkage and replacing
the uses in the module with it. This allows for the optimization to be applied
to any regular function.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D102824

Files:
  llvm/include/llvm/Transforms/IPO/Attributor.h
  llvm/lib/Transforms/IPO/Attributor.cpp
  llvm/lib/Transforms/IPO/OpenMPOpt.cpp
  llvm/test/Transforms/OpenMP/single_threaded_execution.ll

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