gcc/targhooks.h

   1 /* Default target hook functions.
   2    Copyright (C) 2003-2025 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   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
   9 version.
  10
  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
  14 for more details.
  15
  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/>.  */
  19
  20 #ifndef GCC_TARGHOOKS_H
  21 #define GCC_TARGHOOKS_H
  22
  23 extern bool default_legitimate_address_p (machine_mode, rtx, bool, code_helper);
  24
  25 extern void default_external_libcall (rtx);
  26 extern rtx default_legitimize_address (rtx, rtx, machine_mode);
  27 extern bool default_legitimize_address_displacement (rtx *, rtx *,
  28                                                      poly_int64, machine_mode);
  29 extern bool default_const_not_ok_for_debug_p (rtx);
  30
  31 extern int default_unspec_may_trap_p (const_rtx, unsigned);
  32 extern machine_mode default_promote_function_mode (const_tree, machine_mode,
  33                                                         int *, const_tree, int);
  34 extern machine_mode default_promote_function_mode_always_promote
  35                         (const_tree, machine_mode, int *, const_tree, int);
  36
  37 extern machine_mode default_cc_modes_compatible (machine_mode,
  38                                                       machine_mode);
  39
  40 extern bool default_return_in_memory (const_tree, const_tree);
  41
  42 extern rtx default_expand_builtin_saveregs (void);
  43 extern void default_setup_incoming_varargs (cumulative_args_t,
  44                                             const function_arg_info &,
  45                                             int *, int);
  46 extern rtx default_builtin_setjmp_frame_value (void);
  47 extern bool default_pretend_outgoing_varargs_named (cumulative_args_t);
  48
  49 extern scalar_int_mode default_eh_return_filter_mode (void);
  50 extern scalar_int_mode default_libgcc_cmp_return_mode (void);
  51 extern scalar_int_mode default_libgcc_shift_count_mode (void);
  52 extern scalar_int_mode default_unwind_word_mode (void);
  53 extern unsigned HOST_WIDE_INT default_shift_truncation_mask
  54   (machine_mode);
  55 extern unsigned int default_min_divisions_for_recip_mul (machine_mode);
  56 extern bool default_preferred_div_as_shifts_over_mult
  57   (const_tree);
  58 extern int default_mode_rep_extended (scalar_int_mode, scalar_int_mode);
  59
  60 extern tree default_stack_protect_guard (void);
  61 extern tree default_external_stack_protect_fail (void);
  62 extern tree default_hidden_stack_protect_fail (void);
  63
  64 extern machine_mode default_mode_for_suffix (char);
  65
  66 extern tree default_cxx_guard_type (void);
  67 extern tree default_cxx_get_cookie_size (tree);
  68 extern tree default_cxx_adjust_cdtor_callabi_fntype (tree);
  69
  70 extern bool hook_pass_by_reference_must_pass_in_stack
  71   (cumulative_args_t, const function_arg_info &);
  72 extern bool hook_callee_copies_named
  73   (cumulative_args_t ca, const function_arg_info &);
  74
  75 extern void default_print_operand (FILE *, rtx, int);
  76 extern void default_print_operand_address (FILE *, machine_mode, rtx);
  77 extern bool default_print_operand_punct_valid_p (unsigned char);
  78 extern tree default_mangle_assembler_name (const char *);
  79
  80 extern machine_mode default_translate_mode_attribute (machine_mode);
  81 extern bool default_scalar_mode_supported_p (scalar_mode);
  82 extern bool default_libgcc_floating_mode_supported_p (scalar_float_mode);
  83 extern opt_scalar_float_mode default_floatn_mode (int, bool);
  84 extern bool default_floatn_builtin_p (int);
  85 extern bool targhook_words_big_endian (void);
  86 extern bool targhook_float_words_big_endian (void);
  87 extern bool default_float_exceptions_rounding_supported_p (void);
  88 extern bool default_decimal_float_supported_p (void);
  89 extern bool default_fixed_point_supported_p (void);
  90
  91 extern bool default_has_ifunc_p (void);
  92
  93 extern bool default_predict_doloop_p (class loop *);
  94 extern machine_mode default_preferred_doloop_mode (machine_mode);
  95 extern const char * default_invalid_within_doloop (const rtx_insn *);
  96
  97 extern tree default_builtin_vectorized_function (unsigned int, tree, tree);
  98 extern tree default_builtin_md_vectorized_function (tree, tree, tree);
  99
 100 extern int default_builtin_vectorization_cost (enum vect_cost_for_stmt, tree, int);
 101
 102 extern tree default_builtin_reciprocal (tree);
 103
 104 extern void default_emit_support_tinfos (emit_support_tinfos_callback);
 105
 106 extern HOST_WIDE_INT default_static_rtx_alignment (machine_mode);
 107 extern HOST_WIDE_INT default_constant_alignment (const_tree, HOST_WIDE_INT);
 108 extern HOST_WIDE_INT constant_alignment_word_strings (const_tree,
 109                                                       HOST_WIDE_INT);
 110 extern HOST_WIDE_INT default_vector_alignment (const_tree);
 111
 112 extern poly_uint64 default_preferred_vector_alignment (const_tree);
 113 extern bool default_builtin_vector_alignment_reachable (const_tree, bool);
 114 extern bool
 115 default_builtin_support_vector_misalignment (machine_mode mode,
 116                                              const_tree,
 117                                              int, bool);
 118 extern machine_mode default_preferred_simd_mode (scalar_mode mode);
 119 extern machine_mode default_split_reduction (machine_mode);
 120 extern unsigned int default_autovectorize_vector_modes (vector_modes *, bool);
 121 extern opt_machine_mode default_vectorize_related_mode (machine_mode,
 122                                                         scalar_mode,
 123                                                         poly_uint64);
 124 extern opt_machine_mode default_get_mask_mode (machine_mode);
 125 extern bool default_empty_mask_is_expensive (unsigned);
 126 extern bool default_conditional_operation_is_expensive (unsigned);
 127 extern vector_costs *default_vectorize_create_costs (vec_info *, bool);
 128
 129 /* OpenACC hooks.  */
 130 extern bool default_goacc_validate_dims (tree, int [], int, unsigned);
 131 extern int default_goacc_dim_limit (int);
 132 extern bool default_goacc_fork_join (gcall *, const int [], bool);
 133 extern void default_goacc_reduction (gcall *);
 134
 135 /* These are here, and not in hooks.[ch], because not all users of
 136    hooks.h include tm.h, and thus we don't have CUMULATIVE_ARGS.  */
 137
 138 extern bool hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t);
 139 extern bool hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t);
 140
 141 extern bool hook_bool_CUMULATIVE_ARGS_arg_info_false
 142   (cumulative_args_t, const function_arg_info &);
 143 extern bool hook_bool_CUMULATIVE_ARGS_arg_info_true
 144   (cumulative_args_t, const function_arg_info &);
 145 extern int hook_int_CUMULATIVE_ARGS_arg_info_0
 146   (cumulative_args_t, const function_arg_info &);
 147 extern void hook_void_CUMULATIVE_ARGS (cumulative_args_t);
 148 extern void hook_void_CUMULATIVE_ARGS_tree (cumulative_args_t, tree);
 149 extern void hook_void_CUMULATIVE_ARGS_rtx_tree (cumulative_args_t, rtx, tree);
 150 extern const char *hook_invalid_arg_for_unprototyped_fn
 151   (const_tree, const_tree, const_tree);
 152 extern void default_function_arg_advance
 153   (cumulative_args_t, const function_arg_info &);
 154 extern bool default_push_argument (unsigned int);
 155 extern HOST_WIDE_INT default_function_arg_offset (machine_mode, const_tree);
 156 extern pad_direction default_function_arg_padding (machine_mode, const_tree);
 157 extern rtx default_function_arg (cumulative_args_t, const function_arg_info &);
 158 extern rtx default_function_incoming_arg (cumulative_args_t,
 159                                           const function_arg_info &);
 160 extern unsigned int default_function_arg_boundary (machine_mode,
 161                                                    const_tree);
 162 extern unsigned int default_function_arg_round_boundary (machine_mode,
 163                                                          const_tree);
 164 extern bool hook_bool_const_rtx_commutative_p (const_rtx, int);
 165 extern rtx default_function_value (const_tree, const_tree, bool);
 166 extern HARD_REG_SET default_zero_call_used_regs (HARD_REG_SET);
 167 extern rtx default_libcall_value (machine_mode, const_rtx);
 168 extern bool default_function_value_regno_p (const unsigned int);
 169 extern rtx default_internal_arg_pointer (void);
 170 extern rtx default_static_chain (const_tree, bool);
 171 extern void default_trampoline_init (rtx, tree, rtx);
 172 extern void default_emit_call_builtin___clear_cache (rtx, rtx);
 173 extern poly_int64 default_return_pops_args (tree, tree, poly_int64);
 174 extern reg_class_t default_ira_change_pseudo_allocno_class (int, reg_class_t,
 175                                                             reg_class_t);
 176 extern bool default_lra_p (void);
 177 extern int default_register_priority (int);
 178 extern bool default_register_usage_leveling_p (void);
 179 extern bool default_different_addr_displacement_p (void);
 180 extern reg_class_t default_secondary_reload (bool, rtx, reg_class_t,
 181                                              machine_mode,
 182                                              secondary_reload_info *);
 183 extern machine_mode default_secondary_memory_needed_mode (machine_mode);
 184 extern void default_target_option_override (void);
 185 extern void hook_void_bitmap (bitmap);
 186 extern int default_reloc_rw_mask (void);
 187 extern bool default_generate_pic_addr_diff_vec (void);
 188 extern void default_asm_out_constructor (rtx, int);
 189 extern void default_asm_out_destructor (rtx, int);
 190 extern tree default_mangle_decl_assembler_name (tree, tree);
 191 extern tree default_emutls_var_fields (tree, tree *);
 192 extern tree default_emutls_var_init (tree, tree, tree);
 193 extern unsigned int default_hard_regno_nregs (unsigned int, machine_mode);
 194 extern bool default_hard_regno_scratch_ok (unsigned int);
 195 extern bool default_mode_dependent_address_p (const_rtx, addr_space_t);
 196 extern bool default_new_address_profitable_p (rtx, rtx_insn *, rtx);
 197 extern bool default_target_option_valid_attribute_p (tree, tree, tree, int);
 198 extern bool default_target_option_valid_version_attribute_p (tree, tree, tree, int);
 199 extern bool default_target_option_pragma_parse (tree, tree);
 200 extern bool default_target_can_inline_p (tree, tree);
 201 extern bool default_update_ipa_fn_target_info (unsigned int &, const gimple *);
 202 extern bool default_need_ipa_fn_target_info (const_tree, unsigned int &);
 203 extern bool default_valid_pointer_mode (scalar_int_mode);
 204 extern bool default_ref_may_alias_errno (class ao_ref *);
 205 extern scalar_int_mode default_addr_space_pointer_mode (addr_space_t);
 206 extern scalar_int_mode default_addr_space_address_mode (addr_space_t);
 207 extern bool default_addr_space_valid_pointer_mode (scalar_int_mode,
 208                                                    addr_space_t);
 209 extern bool default_addr_space_legitimate_address_p (machine_mode, rtx, bool,
 210                                                      addr_space_t, code_helper);
 211 extern rtx default_addr_space_legitimize_address (rtx, rtx, machine_mode,
 212                                                   addr_space_t);
 213 extern bool default_addr_space_subset_p (addr_space_t, addr_space_t);
 214 extern bool default_addr_space_zero_address_valid (addr_space_t);
 215 extern int default_addr_space_debug (addr_space_t);
 216 extern void default_addr_space_diagnose_usage (addr_space_t, location_t);
 217 extern rtx default_addr_space_convert (rtx, tree, tree);
 218 extern unsigned int default_case_values_threshold (void);
 219 extern bool default_have_conditional_execution (void);
 220 extern bool default_have_ccmp (void);
 221
 222 extern bool default_libc_has_function (enum function_class, tree);
 223 extern bool default_libc_has_fast_function (int fcode);
 224 extern bool no_c99_libc_has_function (enum function_class, tree);
 225 extern bool gnu_libc_has_function (enum function_class, tree);
 226 extern bool bsd_libc_has_function (enum function_class, tree);
 227 extern unsigned default_fortify_source_default_level (void);
 228 extern unsigned default_libm_function_max_error (unsigned, machine_mode, bool);
 229 extern unsigned glibc_linux_libm_function_max_error (unsigned, machine_mode,
 230                                                      bool);
 231
 232 extern tree default_builtin_tm_load_store (tree);
 233
 234 extern int default_memory_move_cost (machine_mode, reg_class_t, bool);
 235 extern int default_register_move_cost (machine_mode, reg_class_t,
 236                                        reg_class_t);
 237 extern bool default_slow_unaligned_access (machine_mode, unsigned int);
 238 extern HOST_WIDE_INT default_estimated_poly_value (poly_int64,
 239                                                    poly_value_estimate_kind);
 240
 241 extern bool default_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT,
 242                                                     unsigned int,
 243                                                     enum by_pieces_operation,
 244                                                     bool);
 245 extern int default_compare_by_pieces_branch_ratio (machine_mode);
 246
 247 extern void default_print_patchable_function_entry (FILE *,
 248                                                     unsigned HOST_WIDE_INT,
 249                                                     bool);
 250 extern bool default_profile_before_prologue (void);
 251 extern reg_class_t default_preferred_reload_class (rtx, reg_class_t);
 252 extern reg_class_t default_preferred_output_reload_class (rtx, reg_class_t);
 253 extern reg_class_t default_preferred_rename_class (reg_class_t rclass);
 254 extern bool default_class_likely_spilled_p (reg_class_t);
 255 extern unsigned char default_class_max_nregs (reg_class_t, machine_mode);
 256
 257 extern bool default_avoid_store_forwarding_p (vec<store_fwd_info>, rtx, int,
 258                                               bool);
 259
 260 extern enum unwind_info_type default_debug_unwind_info (void);
 261
 262 extern void default_canonicalize_comparison (int *, rtx *, rtx *, bool);
 263
 264 extern section * default_function_section(tree decl, enum node_frequency freq,
 265                                           bool startup, bool exit);
 266 extern unsigned int default_dwarf_poly_indeterminate_value (unsigned int,
 267                                                             unsigned int *,
 268                                                             int *);
 269 extern machine_mode default_dwarf_frame_reg_mode (int);
 270 extern fixed_size_mode default_get_reg_raw_mode (int);
 271 extern bool default_keep_leaf_when_profiled ();
 272
 273 extern void *default_get_pch_validity (size_t *);
 274 extern const char *default_pch_valid_p (const void *, size_t);
 275
 276 extern void default_asm_output_ident_directive (const char*);
 277
 278 extern scalar_int_mode default_cstore_mode (enum insn_code);
 279 extern bool default_member_type_forces_blk (const_tree, machine_mode);
 280 extern void default_atomic_assign_expand_fenv (tree *, tree *, tree *);
 281 extern tree build_va_arg_indirect_ref (tree);
 282 extern tree std_gimplify_va_arg_expr (tree, tree, gimple_seq *, gimple_seq *);
 283 extern bool can_use_doloop_if_innermost (const widest_int &,
 284                                          const widest_int &,
 285                                          unsigned int, bool);
 286
 287 extern bool default_optab_supported_p (int, machine_mode, machine_mode,
 288                                        optimization_type);
 289 extern unsigned int default_max_noce_ifcvt_seq_cost (edge);
 290 extern bool default_noce_conversion_profitable_p (rtx_insn *,
 291                                                   struct noce_if_info *);
 292 extern unsigned int default_min_arithmetic_precision (void);
 293
 294 extern enum flt_eval_method
 295 default_excess_precision (enum excess_precision_type ATTRIBUTE_UNUSED);
 296 extern bool default_bitint_type_info (int, struct bitint_info *);
 297 extern machine_mode default_mode_for_floating_type (enum tree_index);
 298 extern HOST_WIDE_INT default_stack_clash_protection_alloca_probe_range (void);
 299 extern void default_select_early_remat_modes (sbitmap);
 300 extern tree default_preferred_else_value (unsigned, tree, unsigned, tree *);
 301
 302 extern bool default_have_speculation_safe_value (bool);
 303 extern bool speculation_safe_value_not_needed (bool);
 304 extern rtx default_speculation_safe_value (machine_mode, rtx, rtx, rtx);
 305
 306 extern bool default_memtag_can_tag_addresses ();
 307 extern uint8_t default_memtag_tag_size ();
 308 extern uint8_t default_memtag_granule_size ();
 309 extern rtx default_memtag_insert_random_tag (rtx, rtx);
 310 extern rtx default_memtag_add_tag (rtx, poly_int64, uint8_t);
 311 extern rtx default_memtag_set_tag (rtx, rtx, rtx);
 312 extern rtx default_memtag_extract_tag (rtx, rtx);
 313 extern rtx default_memtag_untagged_pointer (rtx, rtx);
 314
 315 #endif /* GCC_TARGHOOKS_H */