1 | /* Definitions and declarations for stor-layout.cc. |
2 | Copyright (C) 2013-2023 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_STOR_LAYOUT_H |
21 | #define GCC_STOR_LAYOUT_H |
22 | |
23 | extern void set_min_and_max_values_for_integral_type (tree, int, signop); |
24 | extern void fixup_signed_type (tree); |
25 | extern unsigned int update_alignment_for_field (record_layout_info, tree, |
26 | unsigned int); |
27 | extern record_layout_info start_record_layout (tree); |
28 | extern tree bit_from_pos (tree, tree); |
29 | extern tree byte_from_pos (tree, tree); |
30 | extern void pos_from_bit (tree *, tree *, unsigned int, tree); |
31 | extern void normalize_offset (tree *, tree *, unsigned int); |
32 | extern tree rli_size_unit_so_far (record_layout_info); |
33 | extern tree rli_size_so_far (record_layout_info); |
34 | extern void normalize_rli (record_layout_info); |
35 | extern void place_field (record_layout_info, tree); |
36 | extern void compute_record_mode (tree); |
37 | extern void finish_bitfield_layout (tree); |
38 | extern void finish_record_layout (record_layout_info, int); |
39 | extern void finalize_size_functions (void); |
40 | extern void fixup_unsigned_type (tree); |
41 | extern void initialize_sizetypes (void); |
42 | |
43 | /* Finish up a builtin RECORD_TYPE. Give it a name and provide its |
44 | fields. Optionally specify an alignment, and then lay it out. */ |
45 | extern void finish_builtin_struct (tree, const char *, tree, tree); |
46 | |
47 | /* Given a VAR_DECL, PARM_DECL, RESULT_DECL or FIELD_DECL node, |
48 | calculates the DECL_SIZE, DECL_SIZE_UNIT, DECL_ALIGN and DECL_MODE |
49 | fields. Call this only once for any given decl node. |
50 | |
51 | Second argument is the boundary that this field can be assumed to |
52 | be starting at (in bits). Zero means it can be assumed aligned |
53 | on any boundary that may be needed. */ |
54 | extern void layout_decl (tree, unsigned); |
55 | |
56 | /* Given a ..._TYPE node, calculate the TYPE_SIZE, TYPE_SIZE_UNIT, |
57 | TYPE_ALIGN and TYPE_MODE fields. If called more than once on one |
58 | node, does nothing except for the first time. */ |
59 | extern void layout_type (tree); |
60 | |
61 | /* Return the least alignment in bytes required for type TYPE. */ |
62 | extern unsigned int min_align_of_type (tree); |
63 | |
64 | /* Construct various nodes representing fract or accum data types. */ |
65 | extern tree make_fract_type (int, int, int); |
66 | extern tree make_accum_type (int, int, int); |
67 | |
68 | #define make_signed_fract_type(P) make_fract_type (P, 0, 0) |
69 | #define make_unsigned_fract_type(P) make_fract_type (P, 1, 0) |
70 | #define make_sat_signed_fract_type(P) make_fract_type (P, 0, 1) |
71 | #define make_sat_unsigned_fract_type(P) make_fract_type (P, 1, 1) |
72 | #define make_signed_accum_type(P) make_accum_type (P, 0, 0) |
73 | #define make_unsigned_accum_type(P) make_accum_type (P, 1, 0) |
74 | #define make_sat_signed_accum_type(P) make_accum_type (P, 0, 1) |
75 | #define make_sat_unsigned_accum_type(P) make_accum_type (P, 1, 1) |
76 | |
77 | #define make_or_reuse_signed_fract_type(P) \ |
78 | make_or_reuse_fract_type (P, 0, 0) |
79 | #define make_or_reuse_unsigned_fract_type(P) \ |
80 | make_or_reuse_fract_type (P, 1, 0) |
81 | #define make_or_reuse_sat_signed_fract_type(P) \ |
82 | make_or_reuse_fract_type (P, 0, 1) |
83 | #define make_or_reuse_sat_unsigned_fract_type(P) \ |
84 | make_or_reuse_fract_type (P, 1, 1) |
85 | #define make_or_reuse_signed_accum_type(P) \ |
86 | make_or_reuse_accum_type (P, 0, 0) |
87 | #define make_or_reuse_unsigned_accum_type(P) \ |
88 | make_or_reuse_accum_type (P, 1, 0) |
89 | #define make_or_reuse_sat_signed_accum_type(P) \ |
90 | make_or_reuse_accum_type (P, 0, 1) |
91 | #define make_or_reuse_sat_unsigned_accum_type(P) \ |
92 | make_or_reuse_accum_type (P, 1, 1) |
93 | |
94 | extern tree make_signed_type (int); |
95 | extern tree make_unsigned_type (int); |
96 | |
97 | /* Return the mode for data of a given size SIZE and mode class CLASS. |
98 | If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. |
99 | The value is BLKmode if no other mode is found. This is like |
100 | mode_for_size, but is passed a tree. */ |
101 | extern opt_machine_mode mode_for_size_tree (const_tree, enum mode_class, int); |
102 | |
103 | extern tree bitwise_type_for_mode (machine_mode); |
104 | |
105 | /* Given a VAR_DECL, PARM_DECL or RESULT_DECL, clears the results of |
106 | a previous call to layout_decl and calls it again. */ |
107 | extern void relayout_decl (tree); |
108 | |
109 | /* variable_size (EXP) is like save_expr (EXP) except that it |
110 | is for the special case of something that is part of a |
111 | variable size for a data type. It makes special arrangements |
112 | to compute the value at the right time when the data type |
113 | belongs to a function parameter. */ |
114 | extern tree variable_size (tree); |
115 | |
116 | #endif // GCC_STOR_LAYOUT_H |
117 | |