1 | /* Misc range functions. |
2 | Copyright (C) 2017-2023 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 | range_zero (tree type) |
34 | { |
35 | wide_int zero = wi::zero (TYPE_PRECISION (type)); |
36 | return value_range (type, zero, zero); |
37 | } |
38 | |
39 | value_range |
40 | range_nonzero (tree type) |
41 | { |
42 | wide_int zero = wi::zero (TYPE_PRECISION (type)); |
43 | return value_range (type, zero, zero, VR_ANTI_RANGE); |
44 | } |
45 | |
46 | value_range |
47 | range_positives (tree type) |
48 | { |
49 | unsigned prec = TYPE_PRECISION (type); |
50 | signop sign = TYPE_SIGN (type); |
51 | return value_range (type, wi::zero (precision: prec), wi::max_value (prec, sign)); |
52 | } |
53 | |
54 | value_range |
55 | range_negatives (tree type) |
56 | { |
57 | unsigned prec = TYPE_PRECISION (type); |
58 | signop sign = TYPE_SIGN (type); |
59 | value_range r; |
60 | if (sign == UNSIGNED) |
61 | r.set_undefined (); |
62 | else |
63 | r = value_range (type, wi::min_value (prec, sign), wi::minus_one (precision: prec)); |
64 | return r; |
65 | } |
66 | |