155549Sphantom/* Expand builtin functions. 255549Sphantom Copyright (C) 1988-2020 Free Software Foundation, Inc. 355549Sphantom 455549SphantomThis file is part of GCC. 555549Sphantom 655549SphantomGCC is free software; you can redistribute it and/or modify it under 755549Sphantomthe terms of the GNU General Public License as published by the Free 855549SphantomSoftware Foundation; either version 3, or (at your option) any later 955549Sphantomversion. 1055549Sphantom 1155549SphantomGCC is distributed in the hope that it will be useful, but WITHOUT ANY 1255549SphantomWARRANTY; without even the implied warranty of MERCHANTABILITY or 1355549SphantomFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1455549Sphantomfor more details. 1555549Sphantom 1655549SphantomYou should have received a copy of the GNU General Public License 1755549Sphantomalong with GCC; see the file COPYING3. If not see 1855549Sphantom<http://www.gnu.org/licenses/>. */ 1955549Sphantom 2055549Sphantom#ifndef GCC_BUILTINS_H 2155549Sphantom#define GCC_BUILTINS_H 2255549Sphantom 2355549Sphantom#include <mpc.h> 2455549Sphantom 25141580Sru/* Target-dependent globals. */ 2655549Sphantomstruct target_builtins { 2755549Sphantom /* For each register that may be used for calling a function, this 2855549Sphantom gives a mode used to copy the register's value. VOIDmode indicates 2979538Sru the register is not used for calling a function. If the machine 3055549Sphantom has register windows, this gives only the outbound registers. 3155549Sphantom INCOMING_REGNO gives the corresponding inbound register. */ 3255549Sphantom fixed_size_mode_pod x_apply_args_mode[FIRST_PSEUDO_REGISTER]; 3355549Sphantom 3484306Sru /* For each register that may be used for returning values, this gives 3555549Sphantom a mode used to copy the register's value. VOIDmode indicates the 3655549Sphantom register is not used for returning values. If the machine has 3755549Sphantom register windows, this gives only the outbound registers. 3855549Sphantom INCOMING_REGNO gives the corresponding inbound register. */ 3955549Sphantom fixed_size_mode_pod x_apply_result_mode[FIRST_PSEUDO_REGISTER]; 4055549Sphantom}; 4155549Sphantom 4255549Sphantomextern struct target_builtins default_target_builtins; 4355549Sphantom#if SWITCHABLE_TARGET 4455549Sphantomextern struct target_builtins *this_target_builtins; 4555549Sphantom#else 4655549Sphantom#define this_target_builtins (&default_target_builtins) 4755549Sphantom#endif 4855549Sphantom 4955549Sphantom/* Non-zero if __builtin_constant_p should be folded right away. */ 5055549Sphantomextern bool force_folding_builtin_constant_p; 5155549Sphantom 5255549Sphantomextern bool called_as_built_in (tree); 5355549Sphantomextern bool get_object_alignment_1 (tree, unsigned int *, 5455549Sphantom unsigned HOST_WIDE_INT *); 5555549Sphantomextern unsigned int get_object_alignment (tree); 5655549Sphantomextern bool get_pointer_alignment_1 (tree, unsigned int *, 5755549Sphantom unsigned HOST_WIDE_INT *); 5855549Sphantomextern unsigned int get_pointer_alignment (tree); 59extern unsigned string_length (const void*, unsigned, unsigned); 60 61struct c_strlen_data 62{ 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[]; }; 74 extern struct A *p; 75 n = strlen (p->a); 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 90 for optimization. */ 91 tree minlen; 92 tree maxlen; 93 tree maxbound; 94 /* When non-null, DECL 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. */ 99 tree decl; 100 /* Non-constant offset from the beginning of a string not accounted 101 for in the length range. Used to improve diagnostics. */ 102 tree off; 103}; 104 105extern tree c_strlen (tree, int, c_strlen_data * = NULL, unsigned = 1); 106extern rtx c_readstr (const char *, scalar_int_mode, bool = true); 107extern void expand_builtin_setjmp_setup (rtx, rtx); 108extern void expand_builtin_setjmp_receiver (rtx); 109extern void expand_builtin_update_setjmp_buf (rtx); 110extern tree mathfn_built_in (tree, enum built_in_function fn); 111extern tree mathfn_built_in (tree, combined_fn); 112extern rtx builtin_strncpy_read_str (void *, HOST_WIDE_INT, scalar_int_mode); 113extern rtx builtin_memset_read_str (void *, HOST_WIDE_INT, scalar_int_mode); 114extern rtx expand_builtin_saveregs (void); 115extern tree std_build_builtin_va_list (void); 116extern tree std_fn_abi_va_list (tree); 117extern tree std_canonical_va_list_type (tree); 118extern void std_expand_builtin_va_start (tree, rtx); 119extern void expand_builtin_trap (void); 120extern void expand_ifn_atomic_bit_test_and (gcall *); 121extern void expand_ifn_atomic_compare_exchange (gcall *); 122extern rtx expand_builtin (tree, rtx, rtx, machine_mode, int); 123extern enum built_in_function builtin_mathfn_code (const_tree); 124extern tree fold_builtin_expect (location_t, tree, tree, tree, tree); 125extern bool avoid_folding_inline_builtin (tree); 126extern tree fold_call_expr (location_t, tree, bool); 127extern tree fold_builtin_call_array (location_t, tree, tree, int, tree *); 128extern bool validate_gimple_arglist (const gcall *, ...); 129extern rtx default_expand_builtin (tree, rtx, rtx, machine_mode, int); 130extern bool fold_builtin_next_arg (tree, bool); 131extern tree do_mpc_arg2 (tree, tree, tree, int, int (*)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t)); 132extern tree fold_call_stmt (gcall *, bool); 133extern void set_builtin_user_assembler_name (tree decl, const char *asmspec); 134extern bool is_simple_builtin (tree); 135extern bool is_inexpensive_builtin (tree); 136 137class vr_values; 138tree gimple_call_alloc_size (gimple *, wide_int[2] = NULL, 139 const vr_values * = NULL); 140extern tree compute_objsize (tree, int, tree * = NULL, tree * = NULL, 141 const vr_values * = NULL); 142 143extern bool readonly_data_expr (tree exp); 144extern bool init_target_chars (void); 145extern unsigned HOST_WIDE_INT target_newline; 146extern unsigned HOST_WIDE_INT target_percent; 147extern char target_percent_s[3]; 148extern char target_percent_c[3]; 149extern char target_percent_s_newline[4]; 150extern bool target_char_cst_p (tree t, char *p); 151 152extern internal_fn associated_internal_fn (tree); 153extern internal_fn replacement_internal_fn (gcall *); 154 155bool check_nul_terminated_array (tree, tree, tree = NULL_TREE); 156extern void warn_string_no_nul (location_t, const char *, tree, tree); 157extern tree unterminated_array (tree, tree * = NULL, bool * = NULL); 158extern bool builtin_with_linkage_p (tree); 159extern bool check_access (tree, tree, tree, tree, tree, tree, tree); 160 161 162#endif /* GCC_BUILTINS_H */ 163