[PATCH] D106620: [Clang][LLVM] generate btf_tag annotations for func parameters

[Yonghong Song via Phabricator via cfe-commits]

yonghong-song created this revision.
yonghong-song added reviewers: dblaikie, probinson, aprantl, aaron.ballman.
yonghong-song added a project: debug-info.
Herald added subscribers: dexonsmith, ormris, hiraditya.
yonghong-song requested review of this revision.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

Generate btf_tag annotations for function parameters.
A field "annotations" is introduced to DILocalVariable, and 
annotations are represented as an DINodeArray, similar to
DIComposite elements. The following example illustrates how 
annotations are encoded in IR:

  distinct !DILocalVariable(name: "info",, arg: 1, ..., annotations: !10)
  !10 = !{!11, !12}
  !11 = !{!"btf_tag", !"a"}
  !12 = !{!"btf_tag", !"b"}


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106620

Files:
  clang/lib/CodeGen/CGDebugInfo.cpp
  clang/test/CodeGen/attr-btf_tag-parameter.c
  llvm/include/llvm/IR/DIBuilder.h
  llvm/include/llvm/IR/DebugInfoMetadata.h
  llvm/lib/AsmParser/LLParser.cpp
  llvm/lib/Bitcode/Reader/MetadataLoader.cpp
  llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
  llvm/lib/IR/AsmWriter.cpp
  llvm/lib/IR/DIBuilder.cpp
  llvm/lib/IR/DebugInfoMetadata.cpp
  llvm/lib/IR/LLVMContextImpl.h
  llvm/test/Bitcode/attr-btf_tag-parameter.ll

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