/**
* Convert field arith operation to arith instruction
* (IPUT = ARITH (IGET, lit) -> ARITH (fieldArg <op>= lit))
*/
private static InsnNode convertFieldArith(MethodNode mth, InsnNode insn) {
InsnArg arg = insn.getArg(0);
if (!arg.isInsnWrap()) {
return null;
}
InsnNode wrap = ((InsnWrapArg) arg).getWrapInsn();
InsnType wrapType = wrap.getType();
if ((wrapType != InsnType.ARITH && wrapType != InsnType.STR_CONCAT)
|| !wrap.getArg(0).isInsnWrap()) {
return null;
}
InsnNode get = ((InsnWrapArg) wrap.getArg(0)).getWrapInsn();
InsnType getType = get.getType();
if (getType != InsnType.IGET && getType != InsnType.SGET) {
return null;
}
FieldInfo field = (FieldInfo) ((IndexInsnNode) insn).getIndex();
FieldInfo innerField = (FieldInfo) ((IndexInsnNode) get).getIndex();
if (!field.equals(innerField)) {
return null;
}
try {
InsnArg reg = null;
if (getType == InsnType.IGET) {
reg = get.getArg(0);
}
FieldArg fArg = new FieldArg(field, reg);
if (reg != null) {