Package org.apache.sysds.runtime.controlprogram.parfor.opt

Class ProgramRecompiler

java.lang.Object

org.apache.sysds.runtime.controlprogram.parfor.opt.ProgramRecompiler

public class ProgramRecompiler
extends Object

Constructor Summary

Constructors

Constructor	Description
ProgramRecompiler()

Method Summary

Modifier and Type	Method	Description
static boolean	containsAtLeastOneFunction(ProgramBlock pb)
static ArrayList<ProgramBlock>	generatePartitialRuntimeProgram(Program rtprog, ArrayList<StatementBlock> sbs)
static LocalVariableMap	getReusableScalarVariables(DMLProgram prog, StatementBlock parforSB, LocalVariableMap vars)
static boolean	isApplicableForReuseVariable(DMLProgram prog, StatementBlock parforSB, String var)	This function determines if an parfor input variable is guaranteed to be read-only across multiple invocations of parfor optimization (e.g., in a surrounding while loop).
static void	replaceConstantScalarVariables(StatementBlock sb, LocalVariableMap vars)
static void	rFindAndRecompileIndexingHOP(StatementBlock sb, ProgramBlock pb, String var, ExecutionContext ec, boolean force)	NOTE: if force is set, we set and recompile the respective indexing hops; otherwise, we release the forced exec type and recompile again.

Methods inherited from class java.lang.Object

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

Constructor Details

ProgramRecompiler

public ProgramRecompiler()

Method Details

generatePartitialRuntimeProgram

public static ArrayList<ProgramBlock> generatePartitialRuntimeProgram(Program rtprog,
 ArrayList<StatementBlock> sbs)

rFindAndRecompileIndexingHOP

public static void rFindAndRecompileIndexingHOP(StatementBlock sb,
 ProgramBlock pb,
 String var,
 ExecutionContext ec,
 boolean force)

NOTE: if force is set, we set and recompile the respective indexing hops; otherwise, we release the forced exec type and recompile again. Hence, any changes can be exactly reverted with the same access behavior.

Parameters:

sb - statement block

pb - program block

var - variable

ec - execution context

force - if true, set and recompile the respective indexing hops

getReusableScalarVariables

public static LocalVariableMap getReusableScalarVariables(DMLProgram prog,
 StatementBlock parforSB,
 LocalVariableMap vars)

replaceConstantScalarVariables

public static void replaceConstantScalarVariables(StatementBlock sb,
 LocalVariableMap vars)

isApplicableForReuseVariable

public static boolean isApplicableForReuseVariable(DMLProgram prog,
 StatementBlock parforSB,
 String var)

This function determines if an parfor input variable is guaranteed to be read-only across multiple invocations of parfor optimization (e.g., in a surrounding while loop). In case of invariant variables we can reuse partitioned matrices and propagate constants for better size estimation.

Parameters:

prog - dml program

parforSB - parfor statement block

var - variable

Returns:

true if can reuse variable

containsAtLeastOneFunction

public static boolean containsAtLeastOneFunction(ProgramBlock pb)