1 /*
2 * Copyright (c) 1999, 2023, 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 "precompiled.hpp"
26 #include "ci/ciConstant.hpp"
27 #include "ci/ciUtilities.hpp"
28 #include "memory/allocation.hpp"
29 #include "memory/allocation.inline.hpp"
30
31 // ciConstant
32 //
33 // This class represents a constant value.
34
35 // ------------------------------------------------------------------
36 // ciConstant::is_null_or_zero
37 bool ciConstant::is_null_or_zero() const {
38 if (!is_java_primitive(basic_type())) {
39 return as_object()->is_null_object();
40 } else if (type2size[basic_type()] == 1) {
41 // treat float bits as int, to avoid comparison with -0 and NaN
42 return (_value._int == 0);
43 } else if (type2size[basic_type()] == 2) {
44 // treat double bits as long, to avoid comparison with -0 and NaN
45 return (_value._long == 0);
46 } else {
47 return false;
48 }
49 }
50
51 // ------------------------------------------------------------------
52 // ciConstant::is_loaded
53 bool ciConstant::is_loaded() const {
54 if (is_valid()) {
55 if (is_reference_type(basic_type())) {
56 return as_object()->is_loaded();
57 } else {
58 return true;
59 }
60 }
61 return false;
62 }
63
64 // ------------------------------------------------------------------
65 // ciConstant::should_be_constant
66 bool ciConstant::should_be_constant() const {
67 if (is_valid()) {
68 if (is_reference_type(basic_type())) {
69 return as_object()->should_be_constant();
70 } else {
71 return true;
72 }
73 }
74 return false;
75 }
76
77 // ------------------------------------------------------------------
78 // ciConstant::print
79 void ciConstant::print() {
80 tty->print("<ciConstant type=%s value=",
81 basictype_to_str(basic_type()));
82 switch (basic_type()) {
83 case T_BOOLEAN:
84 tty->print("%s", bool_to_str(_value._int != 0));
85 break;
86 case T_CHAR:
87 case T_BYTE:
88 case T_SHORT:
89 case T_INT:
90 tty->print("%d", _value._int);
91 break;
92 case T_LONG:
93 tty->print(INT64_FORMAT, (int64_t)(_value._long));
94 break;
95 case T_FLOAT:
96 tty->print("%f", _value._float);
97 break;
98 case T_DOUBLE:
99 tty->print("%lf", _value._double);
100 break;
101 default:
102 if (is_reference_type(basic_type())) {
103 _value._object->print();
104 } else {
105 tty->print("ILLEGAL");
106 }
107 break;
108 }
109 tty->print(">");
110 }