Yonghong Song 430e223881 [DebugInfo] generate btf_tag annotations for DIDerived types ...

Generate btf_tag annotations for DIDrived types. More specifically,
clang frontend generates the btf_tag annotations for record
fields. The annotations are represented as an DINodeArray
in DebugInfo. The following example illustrate how
annotations are encoded in IR:
      distinct !DIDerivedType(tag: DW_TAG_member, ..., annotations: !10)
      !10 = !{!11, !12}
      !11 = !{!"btf_tag", !"a"}
      !12 = !{!"btf_tag", !"b"}

Differential Revision: https://reviews.llvm.org/D106616

2021-08-20 12:06:37 -07:00

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