Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/ValueUtil.java @ 22688:ef7d87db544a
Remove unused reference map index.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Fri, 16 Oct 2015 11:12:34 +0200 |
parents | 1bbd4a7c274b |
children | f48b657b550d |
line wrap: on
line source
/* * Copyright (c) 2012, 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 jdk.vm.ci.code; import java.util.ArrayList; import java.util.List; import jdk.vm.ci.meta.AllocatableValue; import jdk.vm.ci.meta.JavaConstant; import jdk.vm.ci.meta.JavaValue; import jdk.vm.ci.meta.PlatformKind; import jdk.vm.ci.meta.Value; /** * Utility class for working with the {@link Value} class and its subclasses. */ public final class ValueUtil { public static boolean isIllegal(Value value) { assert value != null; return Value.ILLEGAL.equals(value); } public static boolean isIllegalJavaValue(JavaValue value) { assert value != null; return Value.ILLEGAL.equals(value); } public static boolean isLegal(Value value) { return !isIllegal(value); } public static boolean isVirtualObject(JavaValue value) { assert value != null; return value instanceof VirtualObject; } public static VirtualObject asVirtualObject(JavaValue value) { assert value != null; return (VirtualObject) value; } public static boolean isConstantJavaValue(JavaValue value) { assert value != null; return value instanceof JavaConstant; } public static JavaConstant asConstantJavaValue(JavaValue value) { assert value != null; return (JavaConstant) value; } public static boolean isAllocatableValue(Value value) { assert value != null; return value instanceof AllocatableValue; } public static AllocatableValue asAllocatableValue(Value value) { assert value != null; return (AllocatableValue) value; } public static boolean isStackSlot(Value value) { assert value != null; return value instanceof StackSlot; } public static StackSlot asStackSlot(Value value) { assert value != null; return (StackSlot) value; } public static boolean isStackSlotValue(Value value) { assert value != null; return value instanceof StackSlotValue; } public static StackSlotValue asStackSlotValue(Value value) { assert value != null; return (StackSlotValue) value; } 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 isRegister(Value value) { assert value != null; return value instanceof RegisterValue; } public static Register asRegister(Value value) { return asRegisterValue(value).getRegister(); } public static RegisterValue asRegisterValue(Value value) { assert value != null; return (RegisterValue) value; } public static Register asRegister(Value value, PlatformKind kind) { if (value.getPlatformKind() != kind) { throw new InternalError("needed: " + kind + " got: " + value.getPlatformKind()); } else { return asRegister(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 (ValueUtil.sameRegister(i, j)) { append = false; break; } } if (append) { result.add(i); } } Value[] resultArray = new Value[result.size()]; return result.toArray(resultArray); } }