1 /* LTO symbol table merging.
2 Copyright (C) 2009-2024 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 extern void lto_symtab_merge_decls (void);
21 extern void lto_symtab_merge_symbols (void);
22 extern tree
lto_symtab_prevailing_decl (tree decl
);
23 extern tree
lto_symtab_prevailing_virtual_decl (tree decl
);
25 /* Mark DECL to be previailed by PREVAILING.
26 Use DECL_LANG_FLAG_0 and DECL_CHAIN as special markers; those do not
27 disturb debug_tree and diagnostics.
28 We are safe to modify them as we wish, because the declarations disappear
29 from the IL after the merging. */
32 lto_symtab_prevail_decl (tree prevailing
, tree decl
)
34 gcc_checking_assert (! DECL_LANG_FLAG_0 (decl
));
35 gcc_assert (TREE_PUBLIC (decl
) || DECL_EXTERNAL (decl
));
36 DECL_CHAIN (decl
) = prevailing
;
37 DECL_LANG_FLAG_0 (decl
) = 1;
40 /* Given the decl DECL, return the prevailing decl with the same name. */
43 lto_symtab_prevailing_decl (tree decl
)
45 if (DECL_LANG_FLAG_0 (decl
))
46 return DECL_CHAIN (decl
);
49 if ((VAR_P (decl
) || TREE_CODE (decl
) == FUNCTION_DECL
)
50 && DECL_VIRTUAL_P (decl
)
51 && (TREE_PUBLIC (decl
) || DECL_EXTERNAL (decl
))
52 && !symtab_node::get (decl
))
53 return lto_symtab_prevailing_virtual_decl (decl
);