@Override
public void visit(BranchingInstruction insn) {
switch (insn.getCondition()) {
case EQUAL:
branch(
compare(BinaryOperation.EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case NOT_EQUAL:
branch(
compare(BinaryOperation.NOT_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case GREATER:
branch(
compare(BinaryOperation.GREATER, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case GREATER_OR_EQUAL:
branch(
compare(BinaryOperation.GREATER_OR_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case LESS:
branch(
compare(BinaryOperation.LESS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case LESS_OR_EQUAL:
branch(
compare(BinaryOperation.LESS_OR_EQUALS, insn.getOperand()),
insn.getConsequent(),
insn.getAlternative());
break;
case NOT_NULL:
branch(
Expr.binary(
BinaryOperation.STRICT_NOT_EQUALS,
Expr.var(insn.getOperand().getIndex()),
Expr.constant(null)),
insn.getConsequent(),
insn.getAlternative());
break;
case NULL:
branch(
Expr.binary(
BinaryOperation.STRICT_EQUALS,
Expr.var(insn.getOperand().getIndex()),
Expr.constant(null)),
insn.getConsequent(),
insn.getAlternative());
break;
}
}
@Override
public void visit(StringConstantInstruction insn) {
assign(Expr.constant(insn.getConstant()), insn.getReceiver());
}
private Expr compare(BinaryOperation op, Variable value) {
Expr expr = Expr.binary(op, Expr.var(value.getIndex()), Expr.constant(0));
expr.setLocation(currentLocation);
return expr;
}
private Expr castToInteger(Expr value) {
return Expr.binary(BinaryOperation.BITWISE_OR, value, Expr.constant(0));
}
@Override
public void visit(NullConstantInstruction insn) {
assign(Expr.constant(null), insn.getReceiver());
}