1 /* Expand builtin functions.
2 Copyright (C) 1988-2019 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 #ifndef GCC_BUILTINS_H
21 #define GCC_BUILTINS_H
25 /* Target-dependent globals. */
26 struct target_builtins
{
27 /* For each register that may be used for calling a function, this
28 gives a mode used to copy the register's value. VOIDmode indicates
29 the register is not used for calling a function. If the machine
30 has register windows, this gives only the outbound registers.
31 INCOMING_REGNO gives the corresponding inbound register. */
32 fixed_size_mode_pod x_apply_args_mode
[FIRST_PSEUDO_REGISTER
];
34 /* For each register that may be used for returning values, this gives
35 a mode used to copy the register's value. VOIDmode indicates the
36 register is not used for returning values. If the machine has
37 register windows, this gives only the outbound registers.
38 INCOMING_REGNO gives the corresponding inbound register. */
39 fixed_size_mode_pod x_apply_result_mode
[FIRST_PSEUDO_REGISTER
];
42 extern struct target_builtins default_target_builtins
;
44 extern struct target_builtins
*this_target_builtins
;
46 #define this_target_builtins (&default_target_builtins)
49 /* Non-zero if __builtin_constant_p should be folded right away. */
50 extern bool force_folding_builtin_constant_p
;
52 extern bool called_as_built_in (tree
);
53 extern bool get_object_alignment_1 (tree
, unsigned int *,
54 unsigned HOST_WIDE_INT
*);
55 extern unsigned int get_object_alignment (tree
);
56 extern bool get_pointer_alignment_1 (tree
, unsigned int *,
57 unsigned HOST_WIDE_INT
*);
58 extern unsigned int get_pointer_alignment (tree
);
59 extern unsigned string_length (const void*, unsigned, unsigned);
63 /* [MINLEN, MAXBOUND, MAXLEN] is a range describing the length of
64 one or more strings of possibly unknown length. For a single
65 string of known length the range is a constant where
66 MINLEN == MAXBOUND == MAXLEN holds.
67 For other strings, MINLEN is the length of the shortest known
68 string. MAXBOUND is the length of a string that could be stored
69 in the largest array referenced by the expression. MAXLEN is
70 the length of the longest sequence of non-zero bytes
71 in an object referenced by the expression. For such strings,
72 MINLEN <= MAXBOUND <= MAXLEN holds. For example, given:
73 struct A { char a[7], b[]; };
76 the computed range will be [0, 6, ALL_ONES].
77 However, for a conditional expression involving a string
78 of known length and an array of unknown bound such as
79 n = strlen (i ? p->b : "123");
80 the range will be [3, 3, ALL_ONES].
81 MINLEN != 0 && MAXLEN == ALL_ONES indicates that MINLEN is
82 the length of the shortest known string and implies that
83 the shortest possible string referenced by the expression may
84 actually be the empty string. This distinction is useful for
85 diagnostics. get_range_strlen() return value distinguishes
86 between these two cases.
87 As the tighter (and more optimistic) bound, MAXBOUND is suitable
88 for diagnostics but not for optimization.
89 As the more conservative bound, MAXLEN is intended to be used
94 /* When non-null, NONSTR refers to the declaration known to store
95 an unterminated constant character array, as in:
96 const char s[] = { 'a', 'b', 'c' };
97 It is used to diagnose uses of such arrays in functions such as
98 strlen() that expect a nul-terminated string as an argument. */
100 /* Non-constant offset from the beginning of a string not accounted
101 for in the length range. Used to improve diagnostics. */
105 extern tree
c_strlen (tree
, int, c_strlen_data
* = NULL
, unsigned = 1);
106 extern rtx
c_readstr (const char *, scalar_int_mode
, bool = true);
107 extern void expand_builtin_setjmp_setup (rtx
, rtx
);
108 extern void expand_builtin_setjmp_receiver (rtx
);
109 extern void expand_builtin_update_setjmp_buf (rtx
);
110 extern tree
mathfn_built_in (tree
, enum built_in_function fn
);
111 extern tree
mathfn_built_in (tree
, combined_fn
);
112 extern rtx
builtin_strncpy_read_str (void *, HOST_WIDE_INT
, scalar_int_mode
);
113 extern rtx
builtin_memset_read_str (void *, HOST_WIDE_INT
, scalar_int_mode
);
114 extern rtx
expand_builtin_saveregs (void);
115 extern tree
std_build_builtin_va_list (void);
116 extern tree
std_fn_abi_va_list (tree
);
117 extern tree
std_canonical_va_list_type (tree
);
118 extern void std_expand_builtin_va_start (tree
, rtx
);
119 extern void expand_builtin_trap (void);
120 extern void expand_ifn_atomic_bit_test_and (gcall
*);
121 extern void expand_ifn_atomic_compare_exchange (gcall
*);
122 extern rtx
expand_builtin (tree
, rtx
, rtx
, machine_mode
, int);
123 extern enum built_in_function
builtin_mathfn_code (const_tree
);
124 extern tree
fold_builtin_expect (location_t
, tree
, tree
, tree
, tree
);
125 extern bool avoid_folding_inline_builtin (tree
);
126 extern tree
fold_call_expr (location_t
, tree
, bool);
127 extern tree
fold_builtin_call_array (location_t
, tree
, tree
, int, tree
*);
128 extern tree
fold_builtin_n (location_t
, tree
, tree
*, int, bool);
129 extern bool validate_gimple_arglist (const gcall
*, ...);
130 extern rtx
default_expand_builtin (tree
, rtx
, rtx
, machine_mode
, int);
131 extern bool fold_builtin_next_arg (tree
, bool);
132 extern tree
do_mpc_arg2 (tree
, tree
, tree
, int, int (*)(mpc_ptr
, mpc_srcptr
, mpc_srcptr
, mpc_rnd_t
));
133 extern tree
fold_call_stmt (gcall
*, bool);
134 extern void set_builtin_user_assembler_name (tree decl
, const char *asmspec
);
135 extern bool is_simple_builtin (tree
);
136 extern bool is_inexpensive_builtin (tree
);
137 extern tree
compute_objsize (tree
, int);
139 extern bool readonly_data_expr (tree exp
);
140 extern bool init_target_chars (void);
141 extern unsigned HOST_WIDE_INT target_newline
;
142 extern unsigned HOST_WIDE_INT target_percent
;
143 extern char target_percent_s
[3];
144 extern char target_percent_c
[3];
145 extern char target_percent_s_newline
[4];
146 extern bool target_char_cst_p (tree t
, char *p
);
148 extern internal_fn
associated_internal_fn (tree
);
149 extern internal_fn
replacement_internal_fn (gcall
*);
151 extern void warn_string_no_nul (location_t
, const char *, tree
, tree
);
152 extern tree
unterminated_array (tree
, tree
* = NULL
, bool * = NULL
);
153 extern bool builtin_with_linkage_p (tree
);
155 #endif /* GCC_BUILTINS_H */