1/* Default target hook functions.
2   Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 2, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING.  If not, write to the Free
18Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
1902110-1301, USA.  */
20
21extern void default_external_libcall (rtx);
22
23extern enum machine_mode default_cc_modes_compatible (enum machine_mode,
24						      enum machine_mode);
25
26extern bool default_return_in_memory (tree, tree);
27
28extern rtx default_expand_builtin_saveregs (void);
29extern void default_setup_incoming_varargs (CUMULATIVE_ARGS *, enum machine_mode, tree, int *, int);
30extern rtx default_builtin_setjmp_frame_value (void);
31extern bool default_pretend_outgoing_varargs_named (CUMULATIVE_ARGS *);
32
33extern enum machine_mode default_eh_return_filter_mode (void);
34extern unsigned HOST_WIDE_INT default_shift_truncation_mask
35  (enum machine_mode);
36extern unsigned int default_min_divisions_for_recip_mul (enum machine_mode);
37
38extern tree default_stack_protect_guard (void);
39extern tree default_external_stack_protect_fail (void);
40extern tree default_hidden_stack_protect_fail (void);
41
42extern tree default_cxx_guard_type (void);
43extern tree default_cxx_get_cookie_size (tree);
44
45extern bool hook_pass_by_reference_must_pass_in_stack
46  (CUMULATIVE_ARGS *, enum machine_mode mode, tree, bool);
47extern bool hook_callee_copies_named
48  (CUMULATIVE_ARGS *ca, enum machine_mode, tree, bool);
49
50extern void default_unwind_emit (FILE *, rtx);
51
52extern bool default_scalar_mode_supported_p (enum machine_mode);
53
54extern const char * default_invalid_within_doloop (rtx);
55
56/* These are here, and not in hooks.[ch], because not all users of
57   hooks.h include tm.h, and thus we don't have CUMULATIVE_ARGS.  */
58
59extern bool hook_bool_CUMULATIVE_ARGS_false (CUMULATIVE_ARGS *);
60extern bool hook_bool_CUMULATIVE_ARGS_true (CUMULATIVE_ARGS *);
61
62extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false
63  (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
64extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
65  (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
66extern int hook_int_CUMULATIVE_ARGS_mode_tree_bool_0
67  (CUMULATIVE_ARGS *, enum machine_mode, tree, bool);
68extern const char *hook_invalid_arg_for_unprototyped_fn
69  (tree, tree, tree);
70extern bool hook_bool_rtx_commutative_p (rtx, int);
71extern rtx default_function_value (tree, tree, bool);
72extern rtx default_internal_arg_pointer (void);
73