[all-commits] [llvm/llvm-project] 0b32dc: Reland [DebugInfo] generate btf_tag annotations fo...

[yonghong-song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0b32dca12ef4d82af71f86a70c49806e5b81ead2
      https://github.com/llvm/llvm-project/commit/0b32dca12ef4d82af71f86a70c49806e5b81ead2
  Author: Yonghong Song <yhs at fb.com>
  Date:   2021-08-19 (Thu, 19 Aug 2021)

  Changed paths:
    M llvm/include/llvm/IR/DIBuilder.h
    M llvm/include/llvm/IR/DebugInfoMetadata.h
    M llvm/lib/AsmParser/LLParser.cpp
    M llvm/lib/Bitcode/Reader/MetadataLoader.cpp
    M llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
    M llvm/lib/IR/AsmWriter.cpp
    M llvm/lib/IR/DIBuilder.cpp
    M llvm/lib/IR/DebugInfoMetadata.cpp
    M llvm/lib/IR/LLVMContextImpl.h
    A llvm/test/Bitcode/attr-btf_tag-dicomposite.ll
    M llvm/unittests/IR/DebugTypeODRUniquingTest.cpp

  Log Message:
  -----------
  Reland [DebugInfo] generate btf_tag annotations for DIComposite types

Clang patch D106614 added attribute btf_tag support. This patch
generates btf_tag annotations for DIComposite types.
A field "annotations" is introduced to DIComposite, and the
annotations are represented as an DINodeArray, similar to
DIComposite elements. The following example illustrates
how annotations are encoded in IR:
  distinct !DICompositeType(..., annotations: !10)
  !10 = !{!11, !12}
  !11 = !{!"btf_tag", !"a"}
  !12 = !{!"btf_tag", !"b"}
Each btf_tag annotation is represented as a 2D array of
meta strings. Each record may have more than one
btf_tag annotations, as in the above example.

Reland with additional fixes for llvm/unittests/IR/DebugTypeODRUniquingTest.cpp.

Differential Revision: https://reviews.llvm.org/D106615