at.dms.kjc.sir.lowering
Class VectorizeEnable

java.lang.Object
  at.dms.kjc.sir.lowering.VectorizeEnable

public class VectorizeEnable
extends Object

Mung code to allow naive vectorization. Note: static methods in this class are not designed to be re-entrant.

Author:

Allyn Dimock

Field Summary

static boolean	debugging Set to true to list sequences of vectorizable filters before fusion and individual vectorizable filters after fusion.
static boolean	vectorsOverTapesDebugged Keep from producing vectors over tapes until I can debug.

Constructor Summary

VectorizeEnable()

Method Summary

static SIRStream

vectorizeEnable(SIRStream str, Map<SIROperator,Integer> partitionTable) Perform naive vectorization on eligible filters in a stream.

Methods inherited from class java.lang.Object

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

Field Detail

debugging

public static boolean debugging

Set to true to list sequences of vectorizable filters before fusion and individual vectorizable filters after fusion.

vectorsOverTapesDebugged

public static boolean vectorsOverTapesDebugged

Keep from producing vectors over tapes until I can debug.

Constructor Detail

VectorizeEnable

public VectorizeEnable()

Method Detail

vectorizeEnable

public static SIRStream vectorizeEnable(SIRStream str,
                                        Map<SIROperator,Integer> partitionTable)

Perform naive vectorization on eligible filters in a stream.
Causes subgraphs and pipeline segments of vectorizable filters to be fused if filters after the first do not peek. Causes vectorizable filters to be executed a multiple of 4 times per steady state.
Vectorization should be run after partitioning, but before fusion or (final) scheduling.
Notes:

• Run before scheduling.
• Only run if you can afford to increase multiplicity of filters: need to document this for user.

Parameters:

str - the Stream to be munged.

partitionTable - partition table so filters in different partitions are not fused. Not currently checked!

Returns:

modified str (str replaced with modified version in parent if any)