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1 : : /* Misc range functions.
2 : : Copyright (C) 2017-2024 Free Software Foundation, Inc.
3 : : Contributed by Aldy Hernandez <aldyh@redhat.com>.
4 : :
5 : : This file is part of GCC.
6 : :
7 : : GCC is free software; you can redistribute it and/or modify it under
8 : : the terms of the GNU General Public License as published by the Free
9 : : Software Foundation; either version 3, or (at your option) any later
10 : : version.
11 : :
12 : : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 : : WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 : : FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 : : for more details.
16 : :
17 : : You should have received a copy of the GNU General Public License
18 : : along with GCC; see the file COPYING3. If not see
19 : : <http://www.gnu.org/licenses/>. */
20 : :
21 : : #include "config.h"
22 : : #include "system.h"
23 : : #include "coretypes.h"
24 : : #include "backend.h"
25 : : #include "tree.h"
26 : : #include "gimple.h"
27 : : #include "gimple-pretty-print.h"
28 : : #include "fold-const.h"
29 : : #include "ssa.h"
30 : : #include "range.h"
31 : :
32 : : value_range
33 : 443783 : range_zero (tree type)
34 : : {
35 : 443783 : wide_int zero = wi::zero (TYPE_PRECISION (type));
36 : 443783 : return value_range (type, zero, zero);
37 : 443783 : }
38 : :
39 : : value_range
40 : 5336893 : range_nonzero (tree type)
41 : : {
42 : 5336893 : wide_int zero = wi::zero (TYPE_PRECISION (type));
43 : 5336893 : return value_range (type, zero, zero, VR_ANTI_RANGE);
44 : 5336893 : }
45 : :
46 : : value_range
47 : 20127 : range_positives (tree type)
48 : : {
49 : 20127 : unsigned prec = TYPE_PRECISION (type);
50 : 20127 : signop sign = TYPE_SIGN (type);
51 : 20127 : return value_range (type, wi::zero (prec), wi::max_value (prec, sign));
52 : : }
53 : :
54 : : value_range
55 : 2940246 : range_negatives (tree type)
56 : : {
57 : 2940246 : unsigned prec = TYPE_PRECISION (type);
58 : 2940246 : signop sign = TYPE_SIGN (type);
59 : 2940246 : value_range r;
60 : 2940246 : if (sign == UNSIGNED)
61 : 0 : r.set_undefined ();
62 : : else
63 : 2940260 : r = value_range (type, wi::min_value (prec, sign), wi::minus_one (prec));
64 : 2940246 : return r;
65 : : }
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