author | ntoda |
Thu, 31 Jul 2014 17:01:24 -0700 | |
changeset 25799 | 1afc4675dc75 |
parent 5506 | 202f599c92aa |
permissions | -rw-r--r-- |
2 | 1 |
/* |
5506 | 2 |
* Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. |
2 | 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 |
|
5506 | 7 |
* published by the Free Software Foundation. Oracle designates this |
2 | 8 |
* particular file as subject to the "Classpath" exception as provided |
5506 | 9 |
* by Oracle in the LICENSE file that accompanied this code. |
2 | 10 |
* |
11 |
* This code is distributed in the hope that it will be useful, but WITHOUT |
|
12 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
13 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
14 |
* version 2 for more details (a copy is included in the LICENSE file that |
|
15 |
* accompanied this code). |
|
16 |
* |
|
17 |
* You should have received a copy of the GNU General Public License version |
|
18 |
* 2 along with this work; if not, write to the Free Software Foundation, |
|
19 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
|
20 |
* |
|
5506 | 21 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
22 |
* or visit www.oracle.com if you need additional information or have any |
|
23 |
* questions. |
|
2 | 24 |
*/ |
25 |
||
26 |
package sun.tools.tree; |
|
27 |
||
28 |
import sun.tools.java.*; |
|
29 |
import sun.tools.asm.Assembler; |
|
30 |
import sun.tools.asm.Label; |
|
31 |
import java.util.Hashtable; |
|
32 |
||
33 |
/** |
|
34 |
* WARNING: The contents of this source file are not part of any |
|
35 |
* supported API. Code that depends on them does so at its own risk: |
|
36 |
* they are subject to change or removal without notice. |
|
37 |
*/ |
|
38 |
public |
|
39 |
class OrExpression extends BinaryLogicalExpression { |
|
40 |
/** |
|
41 |
* constructor |
|
42 |
*/ |
|
43 |
public OrExpression(long where, Expression left, Expression right) { |
|
44 |
super(OR, where, left, right); |
|
45 |
} |
|
46 |
||
47 |
/* |
|
48 |
* Check an "or" expression. |
|
49 |
* |
|
50 |
* cvars is modified so that |
|
51 |
* cvar.vsTrue indicates variables with a known value if |
|
52 |
* either the left and right hand side isn true |
|
53 |
* cvars.vsFalse indicates variables with a known value if |
|
54 |
* both the left or right hand side are false |
|
55 |
*/ |
|
56 |
public void checkCondition(Environment env, Context ctx, Vset vset, |
|
25799
1afc4675dc75
8044867: Fix raw and unchecked lint warnings in sun.tools.*
ntoda
parents:
5506
diff
changeset
|
57 |
Hashtable<Object, Object> exp, ConditionVars cvars) { |
2 | 58 |
// Find out when the left side is true/false |
59 |
left.checkCondition(env, ctx, vset, exp, cvars); |
|
60 |
left = convert(env, ctx, Type.tBoolean, left); |
|
61 |
Vset vsTrue = cvars.vsTrue.copy(); |
|
62 |
Vset vsFalse = cvars.vsFalse.copy(); |
|
63 |
||
64 |
// Only look at the right side if the left side is false |
|
65 |
right.checkCondition(env, ctx, vsFalse, exp, cvars); |
|
66 |
right = convert(env, ctx, Type.tBoolean, right); |
|
67 |
||
68 |
// cvars.vsFalse actually reports that both returned false |
|
69 |
// cvars.vsTrue must be set back to either left side or the right |
|
70 |
// side returning false; |
|
71 |
cvars.vsTrue = cvars.vsTrue.join(vsTrue); |
|
72 |
} |
|
73 |
||
74 |
/** |
|
75 |
* Evaluate |
|
76 |
*/ |
|
77 |
Expression eval(boolean a, boolean b) { |
|
78 |
return new BooleanExpression(where, a || b); |
|
79 |
} |
|
80 |
||
81 |
/** |
|
82 |
* Simplify |
|
83 |
*/ |
|
84 |
Expression simplify() { |
|
85 |
if (right.equals(false)) { |
|
86 |
return left; |
|
87 |
} |
|
88 |
if (left.equals(true)) { |
|
89 |
return left; |
|
90 |
} |
|
91 |
if (left.equals(false)) { |
|
92 |
return right; |
|
93 |
} |
|
94 |
if (right.equals(true)) { |
|
95 |
// Preserve effects of left argument. |
|
96 |
return new CommaExpression(where, left, right).simplify(); |
|
97 |
} |
|
98 |
return this; |
|
99 |
} |
|
100 |
||
101 |
/** |
|
102 |
* Code |
|
103 |
*/ |
|
104 |
void codeBranch(Environment env, Context ctx, Assembler asm, Label lbl, boolean whenTrue) { |
|
105 |
if (whenTrue) { |
|
106 |
left.codeBranch(env, ctx, asm, lbl, true); |
|
107 |
right.codeBranch(env, ctx, asm, lbl, true); |
|
108 |
} else { |
|
109 |
Label lbl2 = new Label(); |
|
110 |
left.codeBranch(env, ctx, asm, lbl2, true); |
|
111 |
right.codeBranch(env, ctx, asm, lbl, false); |
|
112 |
asm.add(lbl2); |
|
113 |
} |
|
114 |
} |
|
115 |
} |