83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/* Support routines for value ranges with equivalences.
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Copyright (C) 2020-2021 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
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it 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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU 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_VALUE_RANGE_EQUIV_H
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#define GCC_VALUE_RANGE_EQUIV_H
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#include "value-range.h"
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/* Note value_range_equiv cannot currently be used with GC memory,
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only value_range is fully set up for this. */
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class GTY((user)) value_range_equiv : public value_range
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{
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public:
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value_range_equiv () : value_range () { m_equiv = NULL; }
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value_range_equiv (const value_range &);
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/* Deep-copies equiv bitmap argument. */
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value_range_equiv (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE);
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/* Shallow-copies equiv bitmap. */
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value_range_equiv (const value_range_equiv &) /* = delete */;
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/* Shallow-copies equiv bitmap. */
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value_range_equiv& operator=(const value_range_equiv &) /* = delete */;
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/* Move equiv bitmap from source range. */
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void move (value_range_equiv *);
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/* Leaves equiv bitmap alone. */
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void update (tree, tree, value_range_kind = VR_RANGE);
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/* Deep-copies equiv bitmap argument. */
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void set (tree, tree, bitmap = NULL, value_range_kind = VR_RANGE);
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void set (tree);
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bool operator== (const value_range_equiv &) const /* = delete */;
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bool operator!= (const value_range_equiv &) const /* = delete */;
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void intersect (const value_range_equiv *);
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void union_ (const value_range_equiv *);
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bool equal_p (const value_range_equiv &, bool ignore_equivs) const;
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/* Types of value ranges. */
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void set_undefined ();
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void set_varying (tree);
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/* Equivalence bitmap methods. */
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bitmap equiv () const { return m_equiv; }
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void equiv_clear ();
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void equiv_add (const_tree, const value_range_equiv *,
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bitmap_obstack * = NULL);
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/* Misc methods. */
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void deep_copy (const value_range_equiv *);
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void dump (FILE *) const;
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void dump () const;
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private:
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/* Deep-copies bitmap argument. */
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void set_equiv (bitmap);
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void check ();
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/* Set of SSA names whose value ranges are equivalent to this one.
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This set is only valid when TYPE is VR_RANGE or VR_ANTI_RANGE. */
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bitmap m_equiv;
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};
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extern void dump_value_range (FILE *, const value_range_equiv *);
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#endif // GCC_VALUE_RANGE_EQUIV_H
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