com.googlecode.dex2jar.ir.ts.FixVar Maven / Gradle / Ivy
/*
* dex2jar - Tools to work with android .dex and java .class files
* Copyright (c) 2009-2012 Panxiaobo
*
* 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.googlecode.dex2jar.ir.ts;
import com.googlecode.dex2jar.ir.IrMethod;
import com.googlecode.dex2jar.ir.LocalVar;
import com.googlecode.dex2jar.ir.expr.Local;
import com.googlecode.dex2jar.ir.expr.Value;
import com.googlecode.dex2jar.ir.expr.Value.VT;
import com.googlecode.dex2jar.ir.stmt.Stmts;
/**
* the {@link LocalVar#reg} in {@link LocalVar} may be replace to a constant value in {@link ConstTransformer}. This
* class try to insert a new local before {@link LocalVar#start}.
*
*
* before:
*
*
*
* ...
* L0:
* return a0
* L1:
* ======
* .var L0 ~ L1 1 -> test // int
*
*
* after:
*
*
*
* ...
* d1 = 1
* L0:
* return a0
* L1:
* ======
* .var L0 ~ L1 d1 -> test // int
*
*
* @author Panxiaobo
*
*/
public class FixVar implements Transformer {
@Override
public void transform(IrMethod irMethod) {
int i = 0;
for (LocalVar var : irMethod.vars) {
if (var.reg.trim().vt != VT.LOCAL) {
if (var.reg.trim().vt == VT.CONSTANT) {
Local n = new Local(i++);
Value old = var.reg.trim();
irMethod.stmts.insertBefore(var.start, Stmts.nAssign(n, old));
var.reg = n;
irMethod.locals.add(n);
} else {
// throw new DexExcpeption("not support");
}
}
}
}
}