[PATCH] D140971: [BPF] generate btf_decl_tag records for params of extern functions

[Eduard Zingerman via Phabricator via llvm-commits]

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After frontend changes in the following commit:
"BPF: preserve btf_decl_tag for parameters of extern functions"
same mechanics could be used to get the list of function parameters
and associated btf_decl_tag entries for both extern and non-extern
functions.

This commit extracts this mechanics as a separate auxiliary function
BTFDebug::processDISubprogram(). The function is called for both
extern and non-extern functions in order to generated corresponding
BTF_DECL_TAG records.

Depends on D140970 <https://reviews.llvm.org/D140970>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D140971

Files:
  llvm/lib/Target/BPF/BTFDebug.cpp
  llvm/lib/Target/BPF/BTFDebug.h
  llvm/test/CodeGen/BPF/BTF/tag-extern-func.ll

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