GCC Middle and Back End API Reference
targhooks.h
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1 /* Default target hook functions.
2  Copyright (C) 2003-2013 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 extern bool default_legitimate_address_p (enum machine_mode, rtx, bool);
21 
22 extern void default_external_libcall (rtx);
23 extern rtx default_legitimize_address (rtx, rtx, enum machine_mode);
24 
25 extern int default_unspec_may_trap_p (const_rtx, unsigned);
26 extern enum machine_mode default_promote_function_mode (const_tree, enum machine_mode,
27  int *, const_tree, int);
28 extern enum machine_mode default_promote_function_mode_always_promote
29  (const_tree, enum machine_mode, int *, const_tree, int);
30 
31 extern enum machine_mode default_cc_modes_compatible (enum machine_mode,
32  enum machine_mode);
33 
34 extern bool default_return_in_memory (const_tree, const_tree);
35 
36 extern rtx default_expand_builtin_saveregs (void);
37 extern void default_setup_incoming_varargs (cumulative_args_t, enum machine_mode, tree, int *, int);
38 extern rtx default_builtin_setjmp_frame_value (void);
39 extern bool default_pretend_outgoing_varargs_named (cumulative_args_t);
40 
41 extern enum machine_mode default_eh_return_filter_mode (void);
42 extern enum machine_mode default_libgcc_cmp_return_mode (void);
43 extern enum machine_mode default_libgcc_shift_count_mode (void);
44 extern enum machine_mode default_unwind_word_mode (void);
45 extern unsigned HOST_WIDE_INT default_shift_truncation_mask
46  (enum machine_mode);
47 extern unsigned int default_min_divisions_for_recip_mul (enum machine_mode);
48 extern int default_mode_rep_extended (enum machine_mode, enum machine_mode);
49 
50 extern tree default_stack_protect_guard (void);
51 extern tree default_external_stack_protect_fail (void);
52 extern tree default_hidden_stack_protect_fail (void);
53 
54 extern enum machine_mode default_mode_for_suffix (char);
55 
56 extern tree default_cxx_guard_type (void);
57 extern tree default_cxx_get_cookie_size (tree);
58 
59 extern bool hook_pass_by_reference_must_pass_in_stack
60  (cumulative_args_t, enum machine_mode mode, const_tree, bool);
61 extern bool hook_callee_copies_named
62  (cumulative_args_t ca, enum machine_mode, const_tree, bool);
63 
64 extern void default_print_operand (FILE *, rtx, int);
65 extern void default_print_operand_address (FILE *, rtx);
66 extern bool default_print_operand_punct_valid_p (unsigned char);
67 extern tree default_mangle_assembler_name (const char *);
68 
69 extern bool default_scalar_mode_supported_p (enum machine_mode);
70 extern bool targhook_words_big_endian (void);
71 extern bool targhook_float_words_big_endian (void);
72 extern bool default_decimal_float_supported_p (void);
73 extern bool default_fixed_point_supported_p (void);
74 
75 extern bool default_has_ifunc_p (void);
76 
77 extern const char * default_invalid_within_doloop (const_rtx);
78 
79 extern tree default_builtin_vectorized_function (tree, tree, tree);
80 
81 extern tree default_builtin_vectorized_conversion (unsigned int, tree, tree);
82 
83 extern int default_builtin_vectorization_cost (enum vect_cost_for_stmt, tree, int);
84 
85 extern tree default_builtin_reciprocal (unsigned int, bool, bool);
86 
87 extern HOST_WIDE_INT default_vector_alignment (const_tree);
88 
89 extern bool default_builtin_vector_alignment_reachable (const_tree, bool);
90 extern bool
91 default_builtin_support_vector_misalignment (enum machine_mode mode,
92  const_tree,
93  int, bool);
94 extern enum machine_mode default_preferred_simd_mode (enum machine_mode mode);
95 extern unsigned int default_autovectorize_vector_sizes (void);
96 extern void *default_init_cost (struct loop *);
97 extern unsigned default_add_stmt_cost (void *, int, enum vect_cost_for_stmt,
98  struct _stmt_vec_info *, int,
99  enum vect_cost_model_location);
100 extern void default_finish_cost (void *, unsigned *, unsigned *, unsigned *);
101 extern void default_destroy_cost_data (void *);
102 
103 /* These are here, and not in hooks.[ch], because not all users of
104  hooks.h include tm.h, and thus we don't have CUMULATIVE_ARGS. */
105 
106 extern bool hook_bool_CUMULATIVE_ARGS_false (cumulative_args_t);
107 extern bool hook_bool_CUMULATIVE_ARGS_true (cumulative_args_t);
108 
109 extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_false
110  (cumulative_args_t, enum machine_mode, const_tree, bool);
111 extern bool hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
112  (cumulative_args_t, enum machine_mode, const_tree, bool);
113 extern int hook_int_CUMULATIVE_ARGS_mode_tree_bool_0
114  (cumulative_args_t, enum machine_mode, tree, bool);
115 extern const char *hook_invalid_arg_for_unprototyped_fn
116  (const_tree, const_tree, const_tree);
117 extern void default_function_arg_advance
118  (cumulative_args_t, enum machine_mode, const_tree, bool);
119 extern rtx default_function_arg
120  (cumulative_args_t, enum machine_mode, const_tree, bool);
121 extern rtx default_function_incoming_arg
122  (cumulative_args_t, enum machine_mode, const_tree, bool);
123 extern unsigned int default_function_arg_boundary (enum machine_mode,
124  const_tree);
125 extern unsigned int default_function_arg_round_boundary (enum machine_mode,
126  const_tree);
127 extern bool hook_bool_const_rtx_commutative_p (const_rtx, int);
128 extern rtx default_function_value (const_tree, const_tree, bool);
129 extern rtx default_libcall_value (enum machine_mode, const_rtx);
130 extern bool default_function_value_regno_p (const unsigned int);
131 extern rtx default_internal_arg_pointer (void);
132 extern rtx default_static_chain (const_tree, bool);
133 extern void default_trampoline_init (rtx, tree, rtx);
134 extern int default_return_pops_args (tree, tree, int);
135 extern reg_class_t default_branch_target_register_class (void);
136 extern bool default_lra_p (void);
137 extern int default_register_priority (int);
138 extern bool default_register_usage_leveling_p (void);
139 extern bool default_different_addr_displacement_p (void);
140 extern reg_class_t default_secondary_reload (bool, rtx, reg_class_t,
141  enum machine_mode,
142  secondary_reload_info *);
143 extern void default_target_option_override (void);
144 extern void hook_void_bitmap (bitmap);
145 extern int default_reloc_rw_mask (void);
146 extern tree default_mangle_decl_assembler_name (tree, tree);
147 extern tree default_emutls_var_fields (tree, tree *);
148 extern tree default_emutls_var_init (tree, tree, tree);
149 extern bool default_hard_regno_scratch_ok (unsigned int);
150 extern bool default_mode_dependent_address_p (const_rtx, addr_space_t);
151 extern bool default_target_option_valid_attribute_p (tree, tree, tree, int);
152 extern bool default_target_option_pragma_parse (tree, tree);
153 extern bool default_target_can_inline_p (tree, tree);
154 extern bool default_valid_pointer_mode (enum machine_mode);
155 extern bool default_ref_may_alias_errno (struct ao_ref_s *);
156 extern enum machine_mode default_addr_space_pointer_mode (addr_space_t);
157 extern enum machine_mode default_addr_space_address_mode (addr_space_t);
158 extern bool default_addr_space_valid_pointer_mode (enum machine_mode,
159  addr_space_t);
160 extern bool default_addr_space_legitimate_address_p (enum machine_mode, rtx,
161  bool, addr_space_t);
162 extern rtx default_addr_space_legitimize_address (rtx, rtx, enum machine_mode,
163  addr_space_t);
164 extern bool default_addr_space_subset_p (addr_space_t, addr_space_t);
165 extern rtx default_addr_space_convert (rtx, tree, tree);
166 extern unsigned int default_case_values_threshold (void);
167 extern bool default_have_conditional_execution (void);
168 
169 extern bool default_libc_has_function (enum function_class);
170 extern bool no_c99_libc_has_function (enum function_class);
171 extern bool gnu_libc_has_function (enum function_class);
172 
173 extern tree default_builtin_tm_load_store (tree);
174 
175 extern int default_memory_move_cost (enum machine_mode, reg_class_t, bool);
176 extern int default_register_move_cost (enum machine_mode, reg_class_t,
177  reg_class_t);
178 
179 extern bool default_profile_before_prologue (void);
180 extern reg_class_t default_preferred_reload_class (rtx, reg_class_t);
181 extern reg_class_t default_preferred_output_reload_class (rtx, reg_class_t);
182 extern reg_class_t default_preferred_rename_class (reg_class_t rclass);
183 extern bool default_class_likely_spilled_p (reg_class_t);
184 extern unsigned char default_class_max_nregs (reg_class_t, enum machine_mode);
185 
186 extern enum unwind_info_type default_debug_unwind_info (void);
187 
188 extern void default_canonicalize_comparison (int *, rtx *, rtx *, bool);
189 
190 extern int default_label_align_after_barrier_max_skip (rtx);
191 extern int default_loop_align_max_skip (rtx);
192 extern int default_label_align_max_skip (rtx);
193 extern int default_jump_align_max_skip (rtx);
194 extern section * default_function_section(tree decl, enum node_frequency freq,
195  bool startup, bool exit);
196 extern enum machine_mode default_get_reg_raw_mode(int);
197 
198 extern void *default_get_pch_validity (size_t *);
199 extern const char *default_pch_valid_p (const void *, size_t);
200 
201 extern void default_asm_output_ident_directive (const char*);
202 
203 extern enum machine_mode default_cstore_mode (enum insn_code);
204 extern bool default_member_type_forces_blk (const_tree, enum machine_mode);