| /* |
| * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.lir; |
| |
| import static jdk.vm.ci.code.ValueUtil.asRegister; |
| import static jdk.vm.ci.code.ValueUtil.isRegister; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.RegisterValue; |
| import jdk.vm.ci.code.StackSlot; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.Value; |
| |
| public final class LIRValueUtil { |
| |
| public static boolean isVariable(Value value) { |
| assert value != null; |
| return value instanceof Variable; |
| } |
| |
| public static Variable asVariable(Value value) { |
| assert value != null; |
| return (Variable) value; |
| } |
| |
| public static boolean isConstantValue(Value value) { |
| assert value != null; |
| return value instanceof ConstantValue; |
| } |
| |
| public static ConstantValue asConstantValue(Value value) { |
| assert value != null; |
| return (ConstantValue) value; |
| } |
| |
| public static Constant asConstant(Value value) { |
| return asConstantValue(value).getConstant(); |
| } |
| |
| public static boolean isJavaConstant(Value value) { |
| return isConstantValue(value) && asConstantValue(value).isJavaConstant(); |
| } |
| |
| public static JavaConstant asJavaConstant(Value value) { |
| return asConstantValue(value).getJavaConstant(); |
| } |
| |
| public static boolean isStackSlotValue(Value value) { |
| assert value != null; |
| return value instanceof StackSlot || value instanceof VirtualStackSlot; |
| } |
| |
| public static boolean isVirtualStackSlot(Value value) { |
| assert value != null; |
| return value instanceof VirtualStackSlot; |
| } |
| |
| public static VirtualStackSlot asVirtualStackSlot(Value value) { |
| assert value != null; |
| return (VirtualStackSlot) value; |
| } |
| |
| public static boolean sameRegister(Value v1, Value v2) { |
| return isRegister(v1) && isRegister(v2) && asRegister(v1).equals(asRegister(v2)); |
| } |
| |
| public static boolean sameRegister(Value v1, Value v2, Value v3) { |
| return sameRegister(v1, v2) && sameRegister(v1, v3); |
| } |
| |
| /** |
| * Checks if all the provided values are different physical registers. The parameters can be |
| * either {@link Register registers}, {@link Value values} or arrays of them. All values that |
| * are not {@link RegisterValue registers} are ignored. |
| */ |
| public static boolean differentRegisters(Object... values) { |
| List<Register> registers = collectRegisters(values, new ArrayList<Register>()); |
| for (int i = 1; i < registers.size(); i++) { |
| Register r1 = registers.get(i); |
| for (int j = 0; j < i; j++) { |
| Register r2 = registers.get(j); |
| if (r1.equals(r2)) { |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| private static List<Register> collectRegisters(Object[] values, List<Register> registers) { |
| for (Object o : values) { |
| if (o instanceof Register) { |
| registers.add((Register) o); |
| } else if (o instanceof Value) { |
| if (isRegister((Value) o)) { |
| registers.add(asRegister((Value) o)); |
| } |
| } else if (o instanceof Object[]) { |
| collectRegisters((Object[]) o, registers); |
| } else { |
| throw new IllegalArgumentException("Not a Register or Value: " + o); |
| } |
| } |
| return registers; |
| } |
| |
| /** |
| * Subtract sets of registers (x - y). |
| * |
| * @param x a set of register to subtract from. |
| * @param y a set of registers to subtract. |
| * @return resulting set of registers (x - y). |
| */ |
| public static Value[] subtractRegisters(Value[] x, Value[] y) { |
| ArrayList<Value> result = new ArrayList<>(x.length); |
| for (Value i : x) { |
| boolean append = true; |
| for (Value j : y) { |
| if (sameRegister(i, j)) { |
| append = false; |
| break; |
| } |
| } |
| if (append) { |
| result.add(i); |
| } |
| } |
| Value[] resultArray = new Value[result.size()]; |
| return result.toArray(resultArray); |
| } |
| } |