/**
* @param c
* @param vars
* @return
*/
private static LiteralOp replaceLiteralValueTypeCastScalarRead(Hop c, LocalVariableMap vars) {
LiteralOp ret = null;
// as.double/as.integer/as.boolean over scalar read - literal replacement
if (c instanceof UnaryOp
&& (((UnaryOp) c).getOp() == OpOp1.CAST_AS_DOUBLE
|| ((UnaryOp) c).getOp() == OpOp1.CAST_AS_INT
|| ((UnaryOp) c).getOp() == OpOp1.CAST_AS_BOOLEAN)
&& c.getInput().get(0) instanceof DataOp
&& c.getDataType() == DataType.SCALAR) {
Data dat = vars.get(c.getInput().get(0).getName());
if (dat != null) // required for selective constant propagation
{
ScalarObject sdat = (ScalarObject) dat;
UnaryOp cast = (UnaryOp) c;
switch (cast.getOp()) {
case CAST_AS_INT:
ret = new LiteralOp(sdat.getLongValue());
break;
case CAST_AS_DOUBLE:
ret = new LiteralOp(sdat.getDoubleValue());
break;
case CAST_AS_BOOLEAN:
ret = new LiteralOp(sdat.getBooleanValue());
break;
default:
// otherwise: do nothing
}
}
}
return ret;
}
@Override
public Object clone() throws CloneNotSupportedException {
UnaryOp ret = new UnaryOp();
// copy generic attributes
ret.clone(this, false);
// copy specific attributes
ret._op = _op;
return ret;
}
@Override
public boolean compare(Hop that) {
if (!(that instanceof UnaryOp)) return false;
/*
* NOTE:
* This compare() method currently is invoked from Hops RewriteCommonSubexpressionElimination,
* which tries to merge two hops if this function returns true. However, two PRINT hops should
* never be merged, and hence returning false.
*
* If this method needs to be used elsewhere, then it must be refactored accordingly.
*/
if (_op == OpOp1.PRINT) return false;
UnaryOp that2 = (UnaryOp) that;
return (_op == that2._op && getInput().get(0) == that2.getInput().get(0));
}
/**
* @param c
* @param vars
* @return
* @throws DMLRuntimeException
*/
private static LiteralOp replaceLiteralValueTypeCastLiteral(Hop c, LocalVariableMap vars)
throws DMLRuntimeException {
LiteralOp ret = null;
// as.double/as.integer/as.boolean over scalar literal (potentially created by other replacement
// rewrite in same dag) - literal replacement
if (c instanceof UnaryOp
&& (((UnaryOp) c).getOp() == OpOp1.CAST_AS_DOUBLE
|| ((UnaryOp) c).getOp() == OpOp1.CAST_AS_INT
|| ((UnaryOp) c).getOp() == OpOp1.CAST_AS_BOOLEAN)
&& c.getInput().get(0) instanceof LiteralOp) {
LiteralOp sdat = (LiteralOp) c.getInput().get(0);
UnaryOp cast = (UnaryOp) c;
try {
switch (cast.getOp()) {
case CAST_AS_INT:
long ival = HopRewriteUtils.getIntValue(sdat);
ret = new LiteralOp(ival);
break;
case CAST_AS_DOUBLE:
double dval = HopRewriteUtils.getDoubleValue(sdat);
ret = new LiteralOp(dval);
break;
case CAST_AS_BOOLEAN:
boolean bval = HopRewriteUtils.getBooleanValue(sdat);
ret = new LiteralOp(bval);
break;
default:
// otherwise: do nothing
}
} catch (HopsException ex) {
throw new DMLRuntimeException(ex);
}
}
return ret;
}