[Clang] Remove the early-check for anonymous struct in ShouldDeleteSpecialMember (#171799)

That check doesn't seem very useful. For non-dependent context records,
ShouldDeleteSpecialMember is called when checking implicitly defined
member functions, before the anonymous flag which the check relies on is
set. (One could notice that in ParseCXXClassMemberDeclaration,
ParseDeclarationSpecifiers ends up calling
ShouldDeleteSpecialMember, while the flag is only set later in
ParsedFreeStandingDeclSpec.)

For dependent contexts, this check actually breaks correctness: since we
don't create those special members until the template is instantiated,
their deletion checks are skipped because of the anonymity.

There's only one regression in ObjC test about notes; we are more
explanative now.

Fixes https://github.com/llvm/llvm-project/issues/167217
4 files changed
tree: 382a72ee83a89438f4b9f7d4502abf512154f095
  1. .ci/
  2. .github/
  3. bolt/
  4. clang/
  5. clang-tools-extra/
  6. cmake/
  7. compiler-rt/
  8. cross-project-tests/
  9. flang/
  10. flang-rt/
  11. libc/
  12. libclc/
  13. libcxx/
  14. libcxxabi/
  15. libsycl/
  16. libunwind/
  17. lld/
  18. lldb/
  19. llvm/
  20. llvm-libgcc/
  21. mlir/
  22. offload/
  23. openmp/
  24. orc-rt/
  25. polly/
  26. runtimes/
  27. third-party/
  28. utils/
  29. .clang-format
  30. .clang-format-ignore
  31. .clang-tidy
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .mailmap
  36. CODE_OF_CONDUCT.md
  37. CONTRIBUTING.md
  38. LICENSE.TXT
  39. pyproject.toml
  40. README.md
  41. SECURITY.md
README.md

The LLVM Compiler Infrastructure

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