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* c-decl.c (struct c_binding): Remove contour field; add depth, invisible, nested fields. (B_IN_SCOPE, B_IN_CURRENT_SCOPE, B_IN_FILE_SCOPE) (B_IN_EXTERNAL_SCOPE): New convenience macros. (bind): Add invisible and nested arguments. Initialize new fields of struct c_binding; adjust loop scanning for insertion point. (free_binding_and_advance): Clear structure with memset. (pop_scope): Adjust to match. Set DECL_CONTEXT on everything in file scope, even if it's in external scope too. (pushdecl): Adjust to match. Create invisible file-scope declarations for block-scope forward declarations of static functions. (pushtag, warn_if_shadowing, pushdecl_top_level, implicitly_declare) (undeclared_variable, lookup_label, declare_label, define_label) (lookup_tag, lookup_name, lookup_name_in_scope, builtin_function) (c_make_fname_decl, store_parm_decls_newstyle, identifier_global_value) (store_parm_decls_oldstyle): Adjust to match. (diagnose_mismatched_decls): Correct handling of linkage clashes. (merge_decls): No need to copy C_DECL_IN_EXTERNAL_SCOPE. * c-tree.h (C_DECL_IN_EXTERNAL_SCOPE): Delete. (C_DECL_DECLARED_BUILTIN, C_DECL_REGISTER): Slide down one. From-SVN: r84046
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