/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.drill.exec.compile.bytecode;
import org.apache.drill.exec.expr.holders.IntHolder;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.tree.analysis.Analyzer;
import org.objectweb.asm.tree.analysis.AnalyzerException;
import org.objectweb.asm.tree.analysis.BasicValue;
import org.objectweb.asm.tree.analysis.Frame;
public class ScalarReplacementNode extends MethodNode {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(ScalarReplacementNode.class);
String[] exceptionsArr;
MethodVisitor inner;
public ScalarReplacementNode(int access, String name, String desc, String signature, String[] exceptions, MethodVisitor inner) {
super(access, name, desc, signature, exceptions);
this.exceptionsArr = exceptions;
this.inner = inner;
}
@Override
public void visitEnd() {
super.visitEnd();
Analyzer<BasicValue> a = new Analyzer<>(new ReplacingInterpreter());
Frame<BasicValue>[] frames;
try {
frames = a.analyze("Object", this);
} catch (AnalyzerException e) {
throw new IllegalStateException(e);
}
TrackingInstructionList list = new TrackingInstructionList(frames, this.instructions);
this.instructions = list;
InstructionModifier holderV = new InstructionModifier(this.access, this.name, this.desc, this.signature, this.exceptionsArr, list, inner);
accept(holderV);
}
IntHolder local;
public void x(){
IntHolder h = new IntHolder();
local = h;
}
}