[Windows] Fix Registry static data members not exported by extract_symbols.py in static builds with plugin support (#163391)

When building LLVM statically (without BUILD_SHARED_LIBS) on Windows with
LLVM_EXPORT_SYMBOLS_FOR_PLUGINS=ON, external plugins cannot register through
llvm::Registry<clang::PluginASTAction> because:

Static data members (Head, Tail) are filtered out during symbol export by
extract_symbols.py because they don't match the function signature patterns
that the script looks for.

This patch fixes the issue by adding pattern matching to extract_symbols.py
to recognize and export Registry static data members.

Note: When LLVM is built with /Zc:dllexportInlines-, inlined functions
aren't exported as symbols, and the plugin must also compile with
/Zc:dllexportInlines- to inline them instead of referencing non-exported
symbols.

Fixes #163367

0 files changed, 0 insertions, 0 deletions