org.jetbrains.kotlin.codegen.optimization.boxing.RedundantBoxedValuesCollection Maven / Gradle / Ivy
/*
* Copyright 2010-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.codegen.optimization.boxing;
import org.jetbrains.annotations.NotNull;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class RedundantBoxedValuesCollection implements Iterable {
private final Set safeToDeleteValues = new HashSet();
public void add(@NotNull BoxedBasicValue value) {
safeToDeleteValues.add(value);
}
public void remove(@NotNull BoxedBasicValue value) {
if (safeToDeleteValues.contains(value)) {
safeToDeleteValues.remove(value);
value.markAsUnsafeToRemove();
for (BoxedBasicValue mergedValue : value.getMergedWith()) {
remove(mergedValue);
}
}
}
public void merge(@NotNull BoxedBasicValue v, @NotNull BoxedBasicValue w) {
v.addMergedWith(w);
w.addMergedWith(v);
if (v.isSafeToRemove() && !w.isSafeToRemove()) {
remove(v);
}
if (!v.isSafeToRemove() && w.isSafeToRemove()) {
remove(w);
}
}
public boolean isEmpty() {
return safeToDeleteValues.isEmpty();
}
@NotNull
@Override
public Iterator iterator() {
return safeToDeleteValues.iterator();
}
}