1 /* Support routines for value ranges with equivalences.
2 Copyright (C) 2020-2022 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GCC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_VALUE_RANGE_EQUIV_H
21 #define GCC_VALUE_RANGE_EQUIV_H
23 #include "value-range.h"
25 /* Note value_range_equiv cannot currently be used with GC memory,
26 only value_range is fully set up for this. */
27 class GTY((user
)) value_range_equiv
: public value_range
30 value_range_equiv () : value_range () { m_equiv
= NULL
; }
31 value_range_equiv (const value_range
&);
32 /* Deep-copies equiv bitmap argument. */
33 value_range_equiv (tree
, tree
, bitmap
= NULL
, value_range_kind
= VR_RANGE
);
35 /* Shallow-copies equiv bitmap. */
36 value_range_equiv (const value_range_equiv
&) /* = delete */;
37 /* Shallow-copies equiv bitmap. */
38 value_range_equiv
& operator=(const value_range_equiv
&) /* = delete */;
40 /* Move equiv bitmap from source range. */
41 void move (value_range_equiv
*);
43 /* Leaves equiv bitmap alone. */
44 virtual void set (tree
, tree
, value_range_kind
= VR_RANGE
) override
;
45 void update (tree
, tree
, value_range_kind
= VR_RANGE
);
46 /* Deep-copies equiv bitmap argument. */
47 void set (tree
, tree
, bitmap
, value_range_kind
= VR_RANGE
);
50 bool operator== (const value_range_equiv
&) const /* = delete */;
51 bool operator!= (const value_range_equiv
&) const /* = delete */;
52 void legacy_verbose_intersect (const value_range_equiv
*);
53 void legacy_verbose_union_ (const value_range_equiv
*);
54 bool equal_p (const value_range_equiv
&, bool ignore_equivs
) const;
56 /* Types of value ranges. */
57 void set_undefined ();
58 void set_varying (tree
);
60 /* Equivalence bitmap methods. */
61 bitmap
equiv () const { return m_equiv
; }
63 void equiv_add (const_tree
, const value_range_equiv
*,
64 bitmap_obstack
* = NULL
);
67 void deep_copy (const value_range_equiv
*);
68 void dump (FILE *) const;
70 static bool supports_p (tree type
)
72 return INTEGRAL_TYPE_P (type
) || POINTER_TYPE_P (type
);
76 /* Deep-copies bitmap argument. */
77 void set_equiv (bitmap
);
80 /* Set of SSA names whose value ranges are equivalent to this one.
81 This set is only valid when TYPE is VR_RANGE or VR_ANTI_RANGE. */
85 extern void dump_value_range (FILE *, const value_range_equiv
*);
87 #endif // GCC_VALUE_RANGE_EQUIV_H