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95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
/* Declaration of class record_layout.
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Copyright (C) 2022-2026 Free Software Foundation, Inc.
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Contributed by David Malcolm <dmalcolm@redhat.com>.
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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
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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_ANALYZER_RECORD_LAYOUT_H
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#define GCC_ANALYZER_RECORD_LAYOUT_H
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#include "analyzer/store.h"
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namespace ana {
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/* Information of the layout of a RECORD_TYPE, capturing it as a vector
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of items, where each item is either a field or padding. */
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class record_layout
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{
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public:
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/* An item within a record; either a field, or padding after a field. */
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struct item
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{
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public:
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item (const bit_range &br,
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const_tree field,
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bool is_padding)
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: m_bit_range (br),
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m_field (field),
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m_is_padding (is_padding)
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{
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}
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bit_offset_t get_start_bit_offset () const
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{
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return m_bit_range.get_start_bit_offset ();
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}
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bit_offset_t get_next_bit_offset () const
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{
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return m_bit_range.get_next_bit_offset ();
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}
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bool contains_p (bit_offset_t offset) const
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{
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return m_bit_range.contains_p (offset);
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}
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void dump_to_pp (pretty_printer *pp) const
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{
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if (m_is_padding)
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pp_printf (pp, "padding after %qD", m_field);
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else
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pp_printf (pp, "%qD", m_field);
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pp_string (pp, ", ");
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m_bit_range.dump_to_pp (pp);
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}
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bit_range m_bit_range;
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const_tree m_field;
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bool m_is_padding;
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};
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record_layout (const_tree record_type);
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void dump_to_pp (pretty_printer *pp) const;
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DEBUG_FUNCTION void dump () const;
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const record_layout::item *get_item_at (bit_offset_t offset) const;
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auto begin () const { return m_items.begin (); }
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auto end () const { return m_items.end (); }
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private:
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void maybe_pad_to (bit_offset_t next_offset);
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auto_vec<item> m_items;
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};
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} // namespace ana
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#endif /* GCC_ANALYZER_RECORD_LAYOUT_H */
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