1/* Definitions and declarations for stor-layout.c. 2 Copyright (C) 2013-2015 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along 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 23extern void set_min_and_max_values_for_integral_type (tree, int, signop); 24extern void fixup_signed_type (tree); 25extern void internal_reference_types (void); 26extern unsigned int update_alignment_for_field (record_layout_info, tree, 27 unsigned int); 28extern record_layout_info start_record_layout (tree); 29extern tree bit_from_pos (tree, tree); 30extern tree byte_from_pos (tree, tree); 31extern void pos_from_bit (tree *, tree *, unsigned int, tree); 32extern void normalize_offset (tree *, tree *, unsigned int); 33extern tree rli_size_unit_so_far (record_layout_info); 34extern tree rli_size_so_far (record_layout_info); 35extern void normalize_rli (record_layout_info); 36extern void place_field (record_layout_info, tree); 37extern void compute_record_mode (tree); 38extern void finish_bitfield_layout (tree); 39extern void finish_record_layout (record_layout_info, int); 40extern unsigned int element_precision (const_tree); 41extern void finalize_size_functions (void); 42extern void fixup_unsigned_type (tree); 43extern void initialize_sizetypes (void); 44 45/* Finish up a builtin RECORD_TYPE. Give it a name and provide its 46 fields. Optionally specify an alignment, and then lay it out. */ 47extern void finish_builtin_struct (tree, const char *, tree, tree); 48 49/* Given a VAR_DECL, PARM_DECL, RESULT_DECL or FIELD_DECL node, 50 calculates the DECL_SIZE, DECL_SIZE_UNIT, DECL_ALIGN and DECL_MODE 51 fields. Call this only once for any given decl node. 52 53 Second argument is the boundary that this field can be assumed to 54 be starting at (in bits). Zero means it can be assumed aligned 55 on any boundary that may be needed. */ 56extern void layout_decl (tree, unsigned); 57 58/* Given a ..._TYPE node, calculate the TYPE_SIZE, TYPE_SIZE_UNIT, 59 TYPE_ALIGN and TYPE_MODE fields. If called more than once on one 60 node, does nothing except for the first time. */ 61extern void layout_type (tree); 62 63/* Return the least alignment in bytes required for type TYPE. */ 64extern unsigned int min_align_of_type (tree); 65 66/* Construct various nodes representing fract or accum data types. */ 67extern tree make_fract_type (int, int, int); 68extern tree make_accum_type (int, int, int); 69 70#define make_signed_fract_type(P) make_fract_type (P, 0, 0) 71#define make_unsigned_fract_type(P) make_fract_type (P, 1, 0) 72#define make_sat_signed_fract_type(P) make_fract_type (P, 0, 1) 73#define make_sat_unsigned_fract_type(P) make_fract_type (P, 1, 1) 74#define make_signed_accum_type(P) make_accum_type (P, 0, 0) 75#define make_unsigned_accum_type(P) make_accum_type (P, 1, 0) 76#define make_sat_signed_accum_type(P) make_accum_type (P, 0, 1) 77#define make_sat_unsigned_accum_type(P) make_accum_type (P, 1, 1) 78 79#define make_or_reuse_signed_fract_type(P) \ 80 make_or_reuse_fract_type (P, 0, 0) 81#define make_or_reuse_unsigned_fract_type(P) \ 82 make_or_reuse_fract_type (P, 1, 0) 83#define make_or_reuse_sat_signed_fract_type(P) \ 84 make_or_reuse_fract_type (P, 0, 1) 85#define make_or_reuse_sat_unsigned_fract_type(P) \ 86 make_or_reuse_fract_type (P, 1, 1) 87#define make_or_reuse_signed_accum_type(P) \ 88 make_or_reuse_accum_type (P, 0, 0) 89#define make_or_reuse_unsigned_accum_type(P) \ 90 make_or_reuse_accum_type (P, 1, 0) 91#define make_or_reuse_sat_signed_accum_type(P) \ 92 make_or_reuse_accum_type (P, 0, 1) 93#define make_or_reuse_sat_unsigned_accum_type(P) \ 94 make_or_reuse_accum_type (P, 1, 1) 95 96extern tree make_signed_type (int); 97extern tree make_unsigned_type (int); 98 99/* Return the mode for data of a given size SIZE and mode class CLASS. 100 If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. 101 The value is BLKmode if no other mode is found. This is like 102 mode_for_size, but is passed a tree. */ 103extern machine_mode mode_for_size_tree (const_tree, enum mode_class, int); 104 105extern tree bitwise_type_for_mode (machine_mode); 106 107/* Given a VAR_DECL, PARM_DECL or RESULT_DECL, clears the results of 108 a previous call to layout_decl and calls it again. */ 109extern void relayout_decl (tree); 110 111/* variable_size (EXP) is like save_expr (EXP) except that it 112 is for the special case of something that is part of a 113 variable size for a data type. It makes special arrangements 114 to compute the value at the right time when the data type 115 belongs to a function parameter. */ 116extern tree variable_size (tree); 117 118/* Vector types need to check target flags to determine type. */ 119extern machine_mode vector_type_mode (const_tree); 120 121#endif // GCC_STOR_LAYOUT_H 122