swift

98c2a837 - [Macros] Always visit macro-produced decls as auxiliary decls

[Macros] Always visit macro-produced decls as auxiliary decls Always use `Decl::visitAuxiliaryDecls` to visit decls produced by macros, including peer macros and declaration macros. Use name-driven expansion for peer macros. Remove `MacroExpansionDecl::getRewritten()`. Also make `ExpandMacroExpansionDeclRequest` cache the buffer ID (similar to other macros) instead of an array of decls.