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/* Support routines for value ranges with equivalences.
Copyright (C) 2020 Free Software Foundation, Inc.
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_VALUE_RANGE_EQUIV_H
#define GCC_VALUE_RANGE_EQUIV_H
#include "value-range.h"
/* Note value_range_equiv cannot currently be used with GC memory,
only value_range is fully set up for this. */
class GTY((user)) value_range_equiv : public value_range
{
public:
value_range_equiv () : value_range () { m_equiv = NULL; }
value_range_equiv (const value_range &);
/* Deep-copies equiv bitmap argument. */
value_range_equiv (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE);
/* Shallow-copies equiv bitmap. */
value_range_equiv (const value_range_equiv &) /* = delete */;
/* Shallow-copies equiv bitmap. */
value_range_equiv& operator=(const value_range_equiv &) /* = delete */;
/* Move equiv bitmap from source range. */
void move (value_range_equiv *);
/* Leaves equiv bitmap alone. */
void update (tree, tree, value_range_kind = VR_RANGE);
/* Deep-copies equiv bitmap argument. */
void set (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE);
void set (tree);
bool operator== (const value_range_equiv &) const /* = delete */;
bool operator!= (const value_range_equiv &) const /* = delete */;
void intersect (const value_range_equiv *);
void union_ (const value_range_equiv *);
bool equal_p (const value_range_equiv &, bool ignore_equivs) const;
/* Types of value ranges. */
void set_undefined ();
void set_varying (tree);
/* Equivalence bitmap methods. */
bitmap equiv () const { return m_equiv; }
void equiv_clear ();
void equiv_add (const_tree, const value_range_equiv *,
bitmap_obstack * = NULL);
/* Misc methods. */
void deep_copy (const value_range_equiv *);
void dump (FILE *) const;
void dump () const;
private:
/* Deep-copies bitmap argument. */
void set_equiv (bitmap);
void check ();
/* Set of SSA names whose value ranges are equivalent to this one.
This set is only valid when TYPE is VR_RANGE or VR_ANTI_RANGE. */
bitmap m_equiv;
};
extern void dump_value_range (FILE *, const value_range_equiv *);
#endif // GCC_VALUE_RANGE_EQUIV_H
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