Mercurial > hg > graal-compiler
comparison graal/GraalCompiler/src/com/sun/c1x/ir/IfOp.java @ 2509:16b9a8b5ad39
Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:50:44 +0200 |
parents | graal/Compiler/src/com/sun/c1x/ir/IfOp.java@9ec15d6914ca |
children | 421da5f53b5e |
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2508:fea94949e0a2 | 2509:16b9a8b5ad39 |
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1 /* | |
2 * Copyright (c) 2009, 2011, 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 package com.sun.c1x.ir; | |
24 | |
25 import com.sun.c1x.debug.*; | |
26 import com.sun.c1x.util.*; | |
27 import com.sun.cri.bytecode.*; | |
28 | |
29 /** | |
30 * The {@code IfOp} class represents a comparison that yields one of two values. | |
31 * Note that these nodes are not built directly from the bytecode but are introduced | |
32 * by conditional expression elimination. | |
33 * | |
34 * @author Ben L. Titzer | |
35 */ | |
36 public final class IfOp extends Op2 { | |
37 | |
38 Condition cond; | |
39 Value trueVal; | |
40 Value falseVal; | |
41 | |
42 /** | |
43 * Constructs a new IfOp. | |
44 * @param x the instruction producing the first value to be compared | |
45 * @param cond the condition of the comparison | |
46 * @param y the instruction producing the second value to be compared | |
47 * @param tval the value produced if the condition is true | |
48 * @param fval the value produced if the condition is false | |
49 */ | |
50 public IfOp(Value x, Condition cond, Value y, Value tval, Value fval) { | |
51 // TODO: return the appropriate bytecode IF_ICMPEQ, etc | |
52 super(tval.kind.meet(fval.kind), Bytecodes.ILLEGAL, x, y); | |
53 this.cond = cond; | |
54 this.trueVal = tval; | |
55 falseVal = fval; | |
56 } | |
57 | |
58 /** | |
59 * Gets the condition of this if operation. | |
60 * @return the condition | |
61 */ | |
62 public Condition condition() { | |
63 return cond; | |
64 } | |
65 | |
66 /** | |
67 * Gets the instruction that produces the value if the comparison is true. | |
68 * @return the instruction producing the value upon true | |
69 */ | |
70 public Value trueValue() { | |
71 return trueVal; | |
72 } | |
73 | |
74 /** | |
75 * Gets the instruction that produces the value if the comparison is false. | |
76 * @return the instruction producing the value upon false | |
77 */ | |
78 public Value falseValue() { | |
79 return falseVal; | |
80 } | |
81 | |
82 /** | |
83 * Checks whether this comparison operator is commutative (i.e. it is either == or !=). | |
84 * @return {@code true} if this comparison is commutative | |
85 */ | |
86 public boolean isCommutative() { | |
87 return cond == Condition.EQ || cond == Condition.NE; | |
88 } | |
89 | |
90 @Override | |
91 public void inputValuesDo(ValueClosure closure) { | |
92 super.inputValuesDo(closure); | |
93 trueVal = closure.apply(trueVal); | |
94 falseVal = closure.apply(falseVal); | |
95 } | |
96 | |
97 @Override | |
98 public void accept(ValueVisitor v) { | |
99 v.visitIfOp(this); | |
100 } | |
101 | |
102 @Override | |
103 public int valueNumber() { | |
104 return Util.hash4(cond.hashCode(), x, y, trueVal, falseVal); | |
105 } | |
106 | |
107 @Override | |
108 public boolean valueEqual(Instruction i) { | |
109 if (i instanceof IfOp) { | |
110 IfOp o = (IfOp) i; | |
111 return opcode == o.opcode && x == o.x && y == o.y && trueVal == o.trueVal && falseVal == o.falseVal; | |
112 } | |
113 return false; | |
114 } | |
115 | |
116 @Override | |
117 public void print(LogStream out) { | |
118 out.print(x()). | |
119 print(' '). | |
120 print(condition().operator). | |
121 print(' '). | |
122 print(y()). | |
123 print(" ? "). | |
124 print(trueValue()). | |
125 print(" : "). | |
126 print(falseValue()); | |
127 } | |
128 } |