[PATCH] D139163: Utils: Add utility pass to lower ifuncs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: MaskRay, aeubanks, erichkeane, MoritzS, ibookstein, dexonsmith, tejohnson.
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This can be used to support ifunc on systems where the program loader
doesn't natively support it.

      

Create a global constructor which will initialize a global table of
function pointers. For AMDGPU, ideally we would have a host-side
resolver function, but failing that, we can have a device side
constructor.

      

Switch funcs to global constructor


https://reviews.llvm.org/D139163

Files:
  llvm/include/llvm/Transforms/Utils/LowerIFunc.h
  llvm/include/llvm/Transforms/Utils/ModuleUtils.h
  llvm/lib/Passes/PassBuilder.cpp
  llvm/lib/Passes/PassRegistry.def
  llvm/lib/Transforms/Utils/CMakeLists.txt
  llvm/lib/Transforms/Utils/LowerIFunc.cpp
  llvm/lib/Transforms/Utils/ModuleUtils.cpp
  llvm/test/Transforms/LowerIFunc/ifunc-alias.ll
  llvm/test/Transforms/LowerIFunc/ifunc-constantexpr.ll
  llvm/test/Transforms/LowerIFunc/ifunc-nonsense-resolvers.ll
  llvm/test/Transforms/LowerIFunc/ifunc-program-addrspace.ll
  llvm/test/Transforms/LowerIFunc/ifunc-typed.ll
  llvm/test/Transforms/LowerIFunc/lower-ifunc.ll

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