1 /* 2 * Copyright (c) 2012, 2015, 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 jdk.vm.ci.code; 24 25 import jdk.vm.ci.meta.AllocatableValue; 26 import jdk.vm.ci.meta.JavaConstant; 27 import jdk.vm.ci.meta.JavaValue; 28 import jdk.vm.ci.meta.PlatformKind; 29 import jdk.vm.ci.meta.Value; 30 31 /** 32 * Utility class for working with the {@link Value} class and its subclasses. 33 */ 34 public final class ValueUtil { 35 isIllegal(Value value)36 public static boolean isIllegal(Value value) { 37 assert value != null; 38 return Value.ILLEGAL.equals(value); 39 } 40 isIllegalJavaValue(JavaValue value)41 public static boolean isIllegalJavaValue(JavaValue value) { 42 assert value != null; 43 return Value.ILLEGAL.equals(value); 44 } 45 isLegal(Value value)46 public static boolean isLegal(Value value) { 47 return !isIllegal(value); 48 } 49 isVirtualObject(JavaValue value)50 public static boolean isVirtualObject(JavaValue value) { 51 assert value != null; 52 return value instanceof VirtualObject; 53 } 54 asVirtualObject(JavaValue value)55 public static VirtualObject asVirtualObject(JavaValue value) { 56 assert value != null; 57 return (VirtualObject) value; 58 } 59 isConstantJavaValue(JavaValue value)60 public static boolean isConstantJavaValue(JavaValue value) { 61 assert value != null; 62 return value instanceof JavaConstant; 63 } 64 asConstantJavaValue(JavaValue value)65 public static JavaConstant asConstantJavaValue(JavaValue value) { 66 assert value != null; 67 return (JavaConstant) value; 68 } 69 isAllocatableValue(Value value)70 public static boolean isAllocatableValue(Value value) { 71 assert value != null; 72 return value instanceof AllocatableValue; 73 } 74 asAllocatableValue(Value value)75 public static AllocatableValue asAllocatableValue(Value value) { 76 assert value != null; 77 return (AllocatableValue) value; 78 } 79 isStackSlot(Value value)80 public static boolean isStackSlot(Value value) { 81 assert value != null; 82 return value instanceof StackSlot; 83 } 84 asStackSlot(Value value)85 public static StackSlot asStackSlot(Value value) { 86 assert value != null; 87 return (StackSlot) value; 88 } 89 isRegister(Value value)90 public static boolean isRegister(Value value) { 91 assert value != null; 92 return value instanceof RegisterValue; 93 } 94 asRegister(Value value)95 public static Register asRegister(Value value) { 96 return asRegisterValue(value).getRegister(); 97 } 98 asRegisterValue(Value value)99 public static RegisterValue asRegisterValue(Value value) { 100 assert value != null; 101 return (RegisterValue) value; 102 } 103 asRegister(Value value, PlatformKind kind)104 public static Register asRegister(Value value, PlatformKind kind) { 105 if (value.getPlatformKind() != kind) { 106 throw new InternalError("needed: " + kind + " got: " + value.getPlatformKind()); 107 } else { 108 return asRegister(value); 109 } 110 } 111 } 112