| /* |
| * Copyright (c) 2013, 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 java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| import java.util.EnumSet; |
| |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.DebugCounter; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandFlag; |
| import org.graalvm.compiler.lir.LIRInstruction.OperandMode; |
| |
| import jdk.vm.ci.meta.Value; |
| import jdk.vm.ci.meta.ValueKind; |
| |
| /** |
| * Base class to represent values that need to be stored in more than one register. This is mainly |
| * intended to support addresses and not general arbitrary nesting of composite values. Because of |
| * the possibility of sharing of CompositeValues they should be immutable. |
| */ |
| public abstract class CompositeValue extends Value { |
| |
| @Retention(RetentionPolicy.RUNTIME) |
| @Target(ElementType.FIELD) |
| public static @interface Component { |
| |
| OperandFlag[] value() default OperandFlag.REG; |
| } |
| |
| private static final DebugCounter COMPOSITE_VALUE_COUNT = Debug.counter("CompositeValues"); |
| |
| public CompositeValue(ValueKind<?> kind) { |
| super(kind); |
| COMPOSITE_VALUE_COUNT.increment(); |
| assert CompositeValueClass.get(getClass()) != null; |
| } |
| |
| /** |
| * Invoke {@code proc} on each {@link Value} element of this {@link CompositeValue}. If |
| * {@code proc} replaces any value then a new CompositeValue should be returned. |
| * |
| * @param inst |
| * @param mode |
| * @param proc |
| * @return the original CompositeValue or a copy with any modified values |
| */ |
| public abstract CompositeValue forEachComponent(LIRInstruction inst, OperandMode mode, InstructionValueProcedure proc); |
| |
| /** |
| * A helper method to visit {@link Value}[] ensuring that a copy of the array is made if it's |
| * needed. |
| * |
| * @param inst |
| * @param values |
| * @param mode |
| * @param proc |
| * @param flags |
| * @return the original {@code values} array or a copy if values changed |
| */ |
| protected Value[] visitValueArray(LIRInstruction inst, Value[] values, OperandMode mode, InstructionValueProcedure proc, EnumSet<OperandFlag> flags) { |
| Value[] newValues = null; |
| for (int i = 0; i < values.length; i++) { |
| Value value = values[i]; |
| Value newValue = proc.doValue(inst, value, mode, flags); |
| if (!value.identityEquals(newValue)) { |
| if (newValues == null) { |
| newValues = values.clone(); |
| } |
| newValues[i] = value; |
| } |
| } |
| return newValues != null ? newValues : values; |
| } |
| |
| protected abstract void visitEachComponent(LIRInstruction inst, OperandMode mode, InstructionValueConsumer proc); |
| |
| @Override |
| public String toString() { |
| return CompositeValueClass.format(this); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 53 * super.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof CompositeValue) { |
| CompositeValue other = (CompositeValue) obj; |
| return super.equals(other); |
| } |
| return false; |
| } |
| } |