1 /* 2 * Copyright (c) 2016, 2016, 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 org.graalvm.compiler.lir.util; 24 25 import java.util.function.BiConsumer; 26 27 import jdk.vm.ci.code.Architecture; 28 import jdk.vm.ci.code.Register; 29 import jdk.vm.ci.code.RegisterArray; 30 31 public class RegisterMap<T> { 32 private final Object[] values; 33 private final Architecture architecture; 34 35 public RegisterMap(Architecture arch) { 36 assert checkArchitecture(arch); 37 this.values = new Object[arch.getRegisters().size()]; 38 this.architecture = arch; 39 } 40 41 @SuppressWarnings("unchecked") 42 public T get(Register reg) { 43 return (T) values[index(reg)]; 44 } 45 46 public void remove(Register reg) { 47 values[index(reg)] = null; 48 } 49 50 public void put(Register reg, T value) { 51 values[index(reg)] = value; 52 } 53 54 @SuppressWarnings("unchecked") 55 public void forEach(BiConsumer<? super Register, ? super T> consumer) { 56 for (int i = 0; i < values.length; ++i) { 57 T value = (T) values[i]; 58 if (value != null) { 59 consumer.accept(architecture.getRegisters().get(i), value); 60 } 61 } 62 } 63 64 private static int index(Register reg) { 65 return reg.number; 66 } 67 68 private static boolean checkArchitecture(Architecture arch) { 69 RegisterArray registers = arch.getRegisters(); 70 for (int i = 0; i < registers.size(); ++i) { 71 assert registers.get(i).number == i : registers.get(i) + ": " + registers.get(i).number + "!=" + i; 72 } 73 return true; 74 } 75 }