[PATCH] D119339: [Bitcode] Improve support for opaque-pointer bitcode upgrade

[Nikita Popov via Phabricator via llvm-commits]

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This is step two of supporting autoupgrade of old bitcode to opaque pointers. Rather than tracking the element type ID of pointers in particular, track all type IDs that a type contains. This allows us to recover the element type in more complex situations, e.g. when we need to determine the pointer element type of a vector element or function type parameter.

Depends on D118694 <https://reviews.llvm.org/D118694>.


https://reviews.llvm.org/D119339

Files:
  llvm/lib/Bitcode/Reader/BitcodeReader.cpp
  llvm/test/Bitcode/DIExpression-aggresult.ll

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