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* tree-convert.c: New file.
* treetree.c: Don't include c-tree.h. Include target.h.
(struct lang_identifier, union lang_tree_node, struct lang_type,
struct lang_function): New, minimal language-specific datastructs.
(tree_lang_truthvalue_conversion, tree_mark_addressable,
tree_lang_type_for_size, tree_lang_type_for_mode,
tree_lang_unsigned_type, tree_lang_signed_type,
tree_lang_signed_or_unsigned): New functions.
(LANG_HOOKS_*): Don't use C front end langhooks. Use new functions.
(pushlevel, poplevel, global_bindings_p, insert_block, set_block,
pushdecl, getdecls, kept_level_p, tree_push_type_decl,
tree_push_atomic_type_decl): New functions.
(struct resword, struct reswords): Remove.
* Make-lang.in: Update. Don't depend on C front end objects.
* config-lang.in: Likewise.
Co-Authored-By: Steven Bosscher <steven@gcc.gnu.org>
From-SVN: r69178
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