claw.wani.transformation.sca

Class Parallelize

java.lang.Object

claw.shenron.transformation.Transformation

claw.wani.transformation.ClawTransformation

claw.wani.transformation.sca.Parallelize

public class Parallelize
extends ClawTransformation

The Single Column Abstraction (SCA) transformation transforms the code contained in a subroutine/function by adding necessary dimensions and parallelism to the defined data. Transformation for the GPU target:

• Automatic promotion is applied to all arrays with intent in, out or inout.
• Do statements over the additional dimensions is added as an outer loop and wrap the entire body of the subroutine.

Transformation for the CPU target:

• Automatic promotion is applied to all arrays with intent in, out or inout.
• Propagated promotion is applied to all scalars or arrays used in an assign statement at the lhs and where a promoted variable is used on the rhs.
• Do statements over the additional dimensions are added as an inner loop wrapping each assign statements including promoted variables.

Generation of OpenACC directives:

• acc routine seq is generated for subroutine called from the parallelized subroutine if they are located in the same translation unit.
• acc data region with corresponding present clause for all promoted variables with the intent in, out or inout.
• acc parallel region is generated to wrap all the body of the subroutine.
• acc private clause is added to the parallel directive for all local variables.
• acc loop is generated for the generated do statement.
• acc loop seq is generated for already existing do statements.

Generation of OpenMP directives:

• omp parallel do is generated for each generated do statements.

Author:

clementval

Field Summary

Fields inherited from class claw.wani.transformation.ClawTransformation

_claw

Constructor Summary

Constructors

Constructor and Description
Parallelize(ClawPragma directive) Constructs a new Parallelize transformation triggered from a specific pragma.

Method Summary

Modifier and Type	Method and Description
boolean	analyze(XcodeProgram xcodeml, Translator translator) Analyze the possibility to apply the transformation.
boolean	canBeTransformedWith(XcodeProgram xcodeml, Transformation other) Check whether the current transformation can be transformed together with the given transformation.
void	transform(XcodeProgram xcodeml, Translator translator, Transformation other) Apply the actual transformation.

Methods inherited from class claw.wani.transformation.ClawTransformation

getLanguageInfo, removePragma

Methods inherited from class claw.shenron.transformation.Transformation

abortOnFailedAnalysis, getDirective, getStartLine, isTransformed, setStartLine, transformed

Methods inherited from class java.lang.Object

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

Constructor Detail

Parallelize

public Parallelize(ClawPragma directive)

Constructs a new Parallelize transformation triggered from a specific pragma.

Parameters:

directive - The directive that triggered the define transformation.

Method Detail

analyze

public boolean analyze(XcodeProgram xcodeml,
                       Translator translator)

Description copied from class: Transformation

Analyze the possibility to apply the transformation. Gather information to be able to apply the transformation in when calling #transform.

Specified by:

analyze in class Transformation

Parameters:

xcodeml - The XcodeML on which the transformations are applied.

translator - The translator used to applied the transformations.

Returns:

True if analysis succeeded. False otherwise.

transform

public void transform(XcodeProgram xcodeml,
                      Translator translator,
                      Transformation other)
               throws java.lang.Exception

Description copied from class: Transformation

Apply the actual transformation.

Specified by:

transform in class Transformation

Parameters:

xcodeml - The XcodeML on which the transformations are applied.

translator - The translator used to applied the transformations.

other - Only for dependent transformation. The other transformation part of the transformation.

Throws:

IllegalTransformationException - if the transformation cannot be applied.

java.lang.Exception

canBeTransformedWith

public boolean canBeTransformedWith(XcodeProgram xcodeml,
                                    Transformation other)

Description copied from class: Transformation

Check whether the current transformation can be transformed together with the given transformation. Useful only for dependent transformation.

Specified by:

canBeTransformedWith in class Transformation

Parameters:

xcodeml - The XcodeML on which the transformations are applied.

other - The other transformation part of the dependent transformation.

Returns:

Always false as independent transformation are applied one by one.

See Also:

Transformation.canBeTransformedWith(XcodeProgram, Transformation)