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/* Declaration of class record_layout.
Copyright (C) 2022-2024 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_ANALYZER_RECORD_LAYOUT_H
#define GCC_ANALYZER_RECORD_LAYOUT_H
#include "analyzer/store.h"
namespace ana {
/* Information of the layout of a RECORD_TYPE, capturing it as a vector
of items, where each item is either a field or padding. */
class record_layout
{
public:
/* An item within a record; either a field, or padding after a field. */
struct item
{
public:
item (const bit_range &br,
tree field,
bool is_padding)
: m_bit_range (br),
m_field (field),
m_is_padding (is_padding)
{
}
bit_offset_t get_start_bit_offset () const
{
return m_bit_range.get_start_bit_offset ();
}
bit_offset_t get_next_bit_offset () const
{
return m_bit_range.get_next_bit_offset ();
}
bool contains_p (bit_offset_t offset) const
{
return m_bit_range.contains_p (offset);
}
void dump_to_pp (pretty_printer *pp) const
{
if (m_is_padding)
pp_printf (pp, "padding after %qD", m_field);
else
pp_printf (pp, "%qD", m_field);
pp_string (pp, ", ");
m_bit_range.dump_to_pp (pp);
}
bit_range m_bit_range;
tree m_field;
bool m_is_padding;
};
record_layout (tree record_type);
void dump_to_pp (pretty_printer *pp) const;
DEBUG_FUNCTION void dump () const;
const record_layout::item *get_item_at (bit_offset_t offset) const;
private:
void maybe_pad_to (bit_offset_t next_offset);
auto_vec<item> m_items;
};
} // namespace ana
#endif /* GCC_ANALYZER_RECORD_LAYOUT_H */
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