org.apache.sysds.lops.compile

Class Dag<N extends Lop>

java.lang.Object

org.apache.sysds.lops.compile.Dag<N>

Type Parameters:

N - the class parameter has no affect and is only kept for documentation purposes.

public class Dag<N extends Lop>
extends Object

Class to maintain a DAG of lops and compile it into runtime instructions, incl piggybacking into jobs.

Constructor Summary

Constructors

Constructor and Description
Dag()

Method Summary

Modifier and Type	Method and Description
boolean	addNode(Lop node) Method to add a node to the DAG.
ArrayList<Instruction>	getJobs(StatementBlock sb, DMLConfig config) Method to compile a dag generically
String	getNextUniqueFilename()
static String	getNextUniqueFilenameSuffix()
static String	getNextUniqueVarname(Types.DataType dt)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Dag

public Dag()

Method Detail

getNextUniqueFilenameSuffix

public static String getNextUniqueFilenameSuffix()

getNextUniqueFilename

public String getNextUniqueFilename()

getNextUniqueVarname

public static String getNextUniqueVarname(Types.DataType dt)

addNode

public boolean addNode(Lop node)

Method to add a node to the DAG.

Parameters:

node - low-level operator

Returns:

true if node was not already present, false if not.

getJobs

public ArrayList<Instruction> getJobs(StatementBlock sb,
                                      DMLConfig config)

Method to compile a dag generically

Parameters:

sb - statement block

config - dml configuration

Returns:

list of instructions