1 /*
2 * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "ci/ciConstant.hpp"
26 #include "ci/ciUtilities.hpp"
27 #include "memory/allocation.hpp"
28 #include "memory/allocation.inline.hpp"
29
30 // ciConstant
31 //
32 // This class represents a constant value.
33
34 // ------------------------------------------------------------------
35 // ciConstant::is_null_or_zero
36 bool ciConstant::is_null_or_zero() const {
37 if (!is_java_primitive(basic_type())) {
38 return as_object()->is_null_object();
39 } else if (type2size[basic_type()] == 1) {
40 // treat float bits as int, to avoid comparison with -0 and NaN
41 return (_value._int == 0);
42 } else if (type2size[basic_type()] == 2) {
43 // treat double bits as long, to avoid comparison with -0 and NaN
44 return (_value._long == 0);
45 } else {
46 return false;
47 }
48 }
49
50 // ------------------------------------------------------------------
51 // ciConstant::is_loaded
52 bool ciConstant::is_loaded() const {
53 if (is_valid()) {
54 if (is_reference_type(basic_type())) {
55 return as_object()->is_loaded();
56 } else {
57 return true;
58 }
59 }
60 return false;
61 }
62
63 // ------------------------------------------------------------------
64 // ciConstant::should_be_constant
65 bool ciConstant::should_be_constant() const {
66 if (is_valid()) {
67 if (is_reference_type(basic_type())) {
68 return as_object()->should_be_constant();
69 } else {
70 return true;
71 }
72 }
73 return false;
74 }
75
76 // ------------------------------------------------------------------
77 // ciConstant::print
78 void ciConstant::print() {
79 tty->print("<ciConstant type=%s value=",
80 basictype_to_str(basic_type()));
81 switch (basic_type()) {
82 case T_BOOLEAN:
83 tty->print("%s", bool_to_str(_value._int != 0));
84 break;
85 case T_CHAR:
86 case T_BYTE:
87 case T_SHORT:
88 case T_INT:
89 tty->print("%d", _value._int);
90 break;
91 case T_LONG:
92 tty->print(INT64_FORMAT, (int64_t)(_value._long));
93 break;
94 case T_FLOAT:
95 tty->print("%f", _value._float);
96 break;
97 case T_DOUBLE:
98 tty->print("%lf", _value._double);
99 break;
100 default:
101 if (is_reference_type(basic_type())) {
102 _value._object->print();
103 } else {
104 tty->print("ILLEGAL");
105 }
106 break;
107 }
108 tty->print(">");
109 }