Package org.apache.sysds.hops.ipa

Class IPAPassFlagFunctionsRecompileOnce

java.lang.Object

org.apache.sysds.hops.ipa.IPAPass

org.apache.sysds.hops.ipa.IPAPassFlagFunctionsRecompileOnce

public class IPAPassFlagFunctionsRecompileOnce
extends IPAPass

This rewrite marks functions with loops as recompile once in order to reduce recompilation overhead. Such functions are recompiled on function entry with the size information of the function inputs which is often sufficient to decide upon execution types; in case there are still unknowns, the traditional recompilation per atomic block still applies.

Constructor Summary

Constructors

Constructor	Description
IPAPassFlagFunctionsRecompileOnce()

Method Summary

Modifier and Type	Method	Description
boolean	isApplicable(FunctionCallGraph fgraph)	Indicates if an IPA pass is applicable for the current configuration such as global flags or the chosen execution mode (e.g., HYBRID).
boolean	rewriteProgram(DMLProgram prog, FunctionCallGraph fgraph, FunctionCallSizeInfo fcallSizes)	Rewrites the given program or its functions in place, with access to the read-only function call graph.
boolean	rFlagFunctionForRecompileOnce(StatementBlock sb, boolean inLoop)	Returns true if this statementblock requires recompilation inside a loop statement block.

Methods inherited from class java.lang.Object

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

Constructor Detail

IPAPassFlagFunctionsRecompileOnce

public IPAPassFlagFunctionsRecompileOnce()

Method Detail

isApplicable

public boolean isApplicable(FunctionCallGraph fgraph)

Description copied from class: IPAPass

Indicates if an IPA pass is applicable for the current configuration such as global flags or the chosen execution mode (e.g., HYBRID).

Specified by:

isApplicable in class IPAPass

Parameters:

fgraph - function call graph

Returns:

true if applicable.

rewriteProgram

public boolean rewriteProgram(DMLProgram prog,
                              FunctionCallGraph fgraph,
                              FunctionCallSizeInfo fcallSizes)

Description copied from class: IPAPass

Rewrites the given program or its functions in place, with access to the read-only function call graph.

Specified by:

rewriteProgram in class IPAPass

Parameters:

prog - dml program

fgraph - function call graph

fcallSizes - function call size infos

Returns:

true if function call graph should be rebuild

rFlagFunctionForRecompileOnce

public boolean rFlagFunctionForRecompileOnce(StatementBlock sb,
                                             boolean inLoop)

Returns true if this statementblock requires recompilation inside a loop statement block.

Parameters:

sb - statement block

inLoop - true if in loop

Returns:

true if statement block requires recompilation inside a loop statement block