com.oracle.graal.phases.common

Class ProfileCompiledMethodsPhase

java.lang.Object

com.oracle.graal.phases.BasePhase<Object>

com.oracle.graal.phases.Phase

com.oracle.graal.phases.common.ProfileCompiledMethodsPhase

public class ProfileCompiledMethodsPhase
extends Phase

This phase add counters for the dynamically executed number of nodes. Incrementing the counter for each node would be too costly, so this phase takes the compromise that it trusts split probabilities, but not loop frequencies. This means that it will insert counters at the start of a method and at each loop header. A schedule is created so that floating nodes can also be taken into account. The weight of a node is determined heuristically in the getNodeWeight(Node) method. Additionally, there's a second counter that's only increased for code sections without invokes.

Field Summary

Fields

Modifier and Type	Field and Description
private static String	GROUP_NAME
private static String	GROUP_NAME_INVOKES
private static String	GROUP_NAME_WITHOUT
private static boolean	WITH_INVOKE_FREE_SECTIONS
private static boolean	WITH_INVOKES
private static boolean	WITH_SECTION_HEADER

Fields inherited from class com.oracle.graal.phases.BasePhase

BEFORE_PHASE_DUMP_LEVEL, PHASE_DUMP_LEVEL

Constructor Summary

Constructors

Constructor and Description
ProfileCompiledMethodsPhase()

Method Summary

Modifier and Type	Method and Description
private static void	addSectionCounters(FixedWithNextNode start, Collection<Block> sectionBlocks, Collection<Loop<Block>> childLoops, SchedulePhase schedule, ControlFlowGraph cfg)
private static double	getNodeWeight(Node node)
private static double	getSectionWeight(SchedulePhase schedule, Collection<Block> blocks)
private static boolean	hasInvoke(Collection<Block> blocks)
protected void	run(StructuredGraph graph)
private static String	sectionHead(Node node)

Methods inherited from class com.oracle.graal.phases.Phase

apply, apply, run

Methods inherited from class com.oracle.graal.phases.BasePhase

apply, apply, createName, getName

Methods inherited from class java.lang.Object

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

Field Detail

GROUP_NAME

private static final String GROUP_NAME

See Also:

Constant Field Values

GROUP_NAME_WITHOUT

private static final String GROUP_NAME_WITHOUT

See Also:

Constant Field Values

GROUP_NAME_INVOKES

private static final String GROUP_NAME_INVOKES

See Also:

Constant Field Values

WITH_SECTION_HEADER

private static final boolean WITH_SECTION_HEADER

WITH_INVOKE_FREE_SECTIONS

private static final boolean WITH_INVOKE_FREE_SECTIONS

WITH_INVOKES

private static final boolean WITH_INVOKES

Constructor Detail

ProfileCompiledMethodsPhase

public ProfileCompiledMethodsPhase()

Method Detail

run

protected void run(StructuredGraph graph)

Specified by:

run in class Phase

addSectionCounters

private static void addSectionCounters(FixedWithNextNode start,
                                       Collection<Block> sectionBlocks,
                                       Collection<Loop<Block>> childLoops,
                                       SchedulePhase schedule,
                                       ControlFlowGraph cfg)

sectionHead

private static String sectionHead(Node node)

getSectionWeight

private static double getSectionWeight(SchedulePhase schedule,
                                       Collection<Block> blocks)

getNodeWeight

private static double getNodeWeight(Node node)

hasInvoke

private static boolean hasInvoke(Collection<Block> blocks)