[PATCH] D135237: [llvm-reduce] Remove debug metadata elements

[Ellis Hoag via Phabricator via llvm-commits]

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There can be lots of `MDTuple` debug metadata nodes. For example, `globals: !{!1, !2}` in `!DICompileUnit()`. Try to remove elements of these tuples.

For D135114 <https://reviews.llvm.org/D135114> I was able to get a reproducer with 364 lines without manually deleting elements. After this patch I got it down to 67 lines.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D135237

Files:
  llvm/test/tools/llvm-reduce/Inputs/remove-metadata.py
  llvm/test/tools/llvm-reduce/remove-debug-info-nodes.ll
  llvm/test/tools/llvm-reduce/remove-metadata-elements.ll
  llvm/test/tools/llvm-reduce/remove-metadata.ll
  llvm/test/tools/llvm-reduce/remove-named-metadata-elements.ll
  llvm/tools/llvm-reduce/deltas/ReduceMetadata.cpp

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