118 lines
5 KiB
C
118 lines
5 KiB
C
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/* Definitions and declarations for stor-layout.cc.
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Copyright (C) 2013-2023 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_STOR_LAYOUT_H
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#define GCC_STOR_LAYOUT_H
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extern void set_min_and_max_values_for_integral_type (tree, int, signop);
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extern void fixup_signed_type (tree);
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extern unsigned int update_alignment_for_field (record_layout_info, tree,
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unsigned int);
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extern record_layout_info start_record_layout (tree);
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extern tree bit_from_pos (tree, tree);
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extern tree byte_from_pos (tree, tree);
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extern void pos_from_bit (tree *, tree *, unsigned int, tree);
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extern void normalize_offset (tree *, tree *, unsigned int);
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extern tree rli_size_unit_so_far (record_layout_info);
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extern tree rli_size_so_far (record_layout_info);
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extern void normalize_rli (record_layout_info);
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extern void place_field (record_layout_info, tree);
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extern void compute_record_mode (tree);
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extern void finish_bitfield_layout (tree);
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extern void finish_record_layout (record_layout_info, int);
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extern unsigned int element_precision (const_tree);
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extern void finalize_size_functions (void);
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extern void fixup_unsigned_type (tree);
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extern void initialize_sizetypes (void);
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/* Finish up a builtin RECORD_TYPE. Give it a name and provide its
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fields. Optionally specify an alignment, and then lay it out. */
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extern void finish_builtin_struct (tree, const char *, tree, tree);
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/* Given a VAR_DECL, PARM_DECL, RESULT_DECL or FIELD_DECL node,
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calculates the DECL_SIZE, DECL_SIZE_UNIT, DECL_ALIGN and DECL_MODE
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fields. Call this only once for any given decl node.
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Second argument is the boundary that this field can be assumed to
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be starting at (in bits). Zero means it can be assumed aligned
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on any boundary that may be needed. */
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extern void layout_decl (tree, unsigned);
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/* Given a ..._TYPE node, calculate the TYPE_SIZE, TYPE_SIZE_UNIT,
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TYPE_ALIGN and TYPE_MODE fields. If called more than once on one
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node, does nothing except for the first time. */
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extern void layout_type (tree);
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/* Return the least alignment in bytes required for type TYPE. */
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extern unsigned int min_align_of_type (tree);
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/* Construct various nodes representing fract or accum data types. */
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extern tree make_fract_type (int, int, int);
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extern tree make_accum_type (int, int, int);
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#define make_signed_fract_type(P) make_fract_type (P, 0, 0)
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#define make_unsigned_fract_type(P) make_fract_type (P, 1, 0)
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#define make_sat_signed_fract_type(P) make_fract_type (P, 0, 1)
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#define make_sat_unsigned_fract_type(P) make_fract_type (P, 1, 1)
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#define make_signed_accum_type(P) make_accum_type (P, 0, 0)
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#define make_unsigned_accum_type(P) make_accum_type (P, 1, 0)
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#define make_sat_signed_accum_type(P) make_accum_type (P, 0, 1)
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#define make_sat_unsigned_accum_type(P) make_accum_type (P, 1, 1)
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#define make_or_reuse_signed_fract_type(P) \
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make_or_reuse_fract_type (P, 0, 0)
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#define make_or_reuse_unsigned_fract_type(P) \
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make_or_reuse_fract_type (P, 1, 0)
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#define make_or_reuse_sat_signed_fract_type(P) \
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make_or_reuse_fract_type (P, 0, 1)
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#define make_or_reuse_sat_unsigned_fract_type(P) \
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make_or_reuse_fract_type (P, 1, 1)
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#define make_or_reuse_signed_accum_type(P) \
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make_or_reuse_accum_type (P, 0, 0)
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#define make_or_reuse_unsigned_accum_type(P) \
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make_or_reuse_accum_type (P, 1, 0)
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#define make_or_reuse_sat_signed_accum_type(P) \
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make_or_reuse_accum_type (P, 0, 1)
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#define make_or_reuse_sat_unsigned_accum_type(P) \
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make_or_reuse_accum_type (P, 1, 1)
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extern tree make_signed_type (int);
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extern tree make_unsigned_type (int);
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/* Return the mode for data of a given size SIZE and mode class CLASS.
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If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
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The value is BLKmode if no other mode is found. This is like
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mode_for_size, but is passed a tree. */
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extern opt_machine_mode mode_for_size_tree (const_tree, enum mode_class, int);
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extern tree bitwise_type_for_mode (machine_mode);
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/* Given a VAR_DECL, PARM_DECL or RESULT_DECL, clears the results of
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a previous call to layout_decl and calls it again. */
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extern void relayout_decl (tree);
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/* variable_size (EXP) is like save_expr (EXP) except that it
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is for the special case of something that is part of a
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variable size for a data type. It makes special arrangements
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to compute the value at the right time when the data type
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belongs to a function parameter. */
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extern tree variable_size (tree);
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#endif // GCC_STOR_LAYOUT_H
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