java/java-analysis-impl/src/com/intellij/codeInspection/bytecodeAnalysis/asm/LiteFramelessAnalyzer.java

/*
 * Copyright 2000-2014 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 com.intellij.codeInspection.bytecodeAnalysis.asm;

import org.jetbrains.org.objectweb.asm.tree.AbstractInsnNode;
import org.jetbrains.org.objectweb.asm.tree.analysis.AnalyzerException;

import java.util.List;

/**
 * Specialized lite version of {@link FramelessAnalyzer}.
 * No processing of Subroutines. May be used for methods without JSR/RET instructions.
 *
 * @author lambdamix
 */
public class LiteFramelessAnalyzer extends FramelessAnalyzer {

  @Override
  protected void findSubroutine(int insn, Subroutine sub, List<AbstractInsnNode> calls) throws AnalyzerException {
  }

  @Override
  protected void merge(final int insn, final Subroutine subroutine) throws AnalyzerException {
    if (!wasQueued[insn]) {
      wasQueued[insn] = true;
      if (!queued[insn]) {
        queued[insn] = true;
        queue[top++] = insn;
      }
    }
  }

  @Override
  protected void merge(final int insn, final Subroutine subroutineBeforeJSR, final boolean[] access) throws AnalyzerException {
    if (!wasQueued[insn]) {
      wasQueued[insn] = true;
      if (!queued[insn]) {
        queued[insn] = true;
        queue[top++] = insn;
      }
    }
  }
}