[PATCH] D123800: [BPF] handle opaque-pointer for __builtin_preserve_enum_value

[Yonghong Song via Phabricator via llvm-commits]

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Opaque pointer [1] is enabled as the default with commit [2].
Andrii found that current __builtin_preserve_enum_value() can only handle
non opaque pointer code pattern and will segfault with latest
llvm main branch where opaque-pointer is enabled by default.

This patch added the opaque pointer support.
Besides llvm selftests, also verified with bpf-next bpf selftests.

  [1] https://llvm.org/docs/OpaquePointers.html
  [2] https://reviews.llvm.org/D123122


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123800

Files:
  llvm/lib/Target/BPF/BPFAbstractMemberAccess.cpp
  llvm/test/CodeGen/BPF/CORE/intrinsic-typeinfo-enum-value-opaque-pointer.ll

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