Mercurial > hg > graal-jvmci-8
comparison graal/Compiler/src/com/sun/c1x/lir/LIROperand.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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2506:4a3bf8a5bf41 | 2507:9ec15d6914ca |
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1 /* | |
2 * Copyright (c) 2009, 2010, 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.lir; | |
24 | |
25 import com.sun.cri.ci.*; | |
26 | |
27 /** | |
28 * An instruction operand. If the register allocator can modify this operand (e.g. to replace a | |
29 * variable with a register), then it will have a corresponding entry in the {@link LIRInstruction#allocatorOperands} | |
30 * list of an instruction. | |
31 * | |
32 * @author Doug Simon | |
33 */ | |
34 public class LIROperand { | |
35 | |
36 /** | |
37 * The value of the operand. | |
38 */ | |
39 CiValue value; | |
40 | |
41 LIROperand(CiValue value) { | |
42 this.value = value; | |
43 } | |
44 | |
45 /** | |
46 * Gets the value of this operand. This may still be a {@linkplain CiVariable} | |
47 * if the register allocator has not yet assigned a register or stack address to the operand. | |
48 * | |
49 * @param inst the instruction containing this operand | |
50 */ | |
51 public CiValue value(LIRInstruction inst) { | |
52 return value; | |
53 } | |
54 | |
55 @Override | |
56 public String toString() { | |
57 return value.toString(); | |
58 } | |
59 | |
60 static class LIRVariableOperand extends LIROperand { | |
61 /** | |
62 * Index into an instruction's {@linkplain LIRInstruction#allocatorOperands allocator operands}. | |
63 */ | |
64 final int index; | |
65 | |
66 LIRVariableOperand(int index) { | |
67 super(null); | |
68 this.index = index; | |
69 } | |
70 | |
71 @Override | |
72 public CiValue value(LIRInstruction inst) { | |
73 if (value == null) { | |
74 CiValue value = inst.allocatorOperands.get(index); | |
75 if (value.isVariable()) { | |
76 return value; | |
77 } | |
78 this.value = value; | |
79 } | |
80 return value; | |
81 } | |
82 | |
83 @Override | |
84 public String toString() { | |
85 if (value == null) { | |
86 return "operands[" + index + "]"; | |
87 } | |
88 return value.toString(); | |
89 } | |
90 } | |
91 | |
92 /** | |
93 * An address operand with at least one {@linkplain CiVariable variable} constituent. | |
94 */ | |
95 static class LIRAddressOperand extends LIROperand { | |
96 int base; | |
97 int index; | |
98 | |
99 LIRAddressOperand(int base, int index, CiAddress address) { | |
100 super(address); | |
101 assert base != -1 || index != -1 : "address should have at least one variable part"; | |
102 this.base = base; | |
103 this.index = index; | |
104 } | |
105 | |
106 @Override | |
107 public CiValue value(LIRInstruction inst) { | |
108 if (base != -1 || index != -1) { | |
109 CiAddress address = (CiAddress) value; | |
110 CiValue baseOperand = base == -1 ? address.base : inst.allocatorOperands.get(base); | |
111 CiValue indexOperand = index == -1 ? address.index : inst.allocatorOperands.get(index); | |
112 if (address.index.isLegal()) { | |
113 assert indexOperand.isVariableOrRegister(); | |
114 if (baseOperand.isVariable() || indexOperand.isVariable()) { | |
115 return address; | |
116 } | |
117 } else { | |
118 if (baseOperand.isVariable()) { | |
119 return address; | |
120 } | |
121 } | |
122 value = new CiAddress(address.kind, baseOperand, indexOperand, address.scale, address.displacement); | |
123 base = -1; | |
124 index = -1; | |
125 } | |
126 return value; | |
127 } | |
128 | |
129 @Override | |
130 public String toString() { | |
131 return value.toString(); | |
132 } | |
133 } | |
134 } |