com.googlecode.dex2jar.ir.ts.VoidInvokeTransformer Maven / Gradle / Ivy
package com.googlecode.dex2jar.ir.ts;
import com.googlecode.dex2jar.ir.IrMethod;
import com.googlecode.dex2jar.ir.expr.AbstractInvokeExpr;
import com.googlecode.dex2jar.ir.expr.Local;
import com.googlecode.dex2jar.ir.expr.Value;
import com.googlecode.dex2jar.ir.stmt.Stmt;
import com.googlecode.dex2jar.ir.stmt.Stmts;
/**
* convert
*
*
* a = b.get();
*
*
* to
*
*
* b.get();
*
*
* if a is not used in other place.
*/
public class VoidInvokeTransformer extends StatedTransformer {
@Override
public boolean transformReportChanged(IrMethod method) {
if (method.locals.isEmpty()) {
return false;
}
int[] reads = Cfg.countLocalReads(method);
boolean changed = false;
for (Stmt p = method.stmts.getFirst(); p != null; p = p.getNext()) {
if (p.st == Stmt.ST.ASSIGN && p.getOp1().vt == Value.VT.LOCAL) {
Local left = (Local) p.getOp1();
if (reads[left.lsIndex] == 0) {
Value op2 = p.getOp2();
if (op2 instanceof AbstractInvokeExpr) {
method.locals.remove(left);
Stmt nVoidInvoke = Stmts.nVoidInvoke(op2);
method.stmts.replace(p, nVoidInvoke);
p = nVoidInvoke;
changed = true;
}
}
}
}
return changed;
}
@Override
public void transform(IrMethod method) {
transformReportChanged(method);
}
}