org.graalvm.compiler.loop

Class DerivedScaledInductionVariable

java.lang.Object

org.graalvm.compiler.loop.InductionVariable

org.graalvm.compiler.loop.DerivedInductionVariable

org.graalvm.compiler.loop.DerivedScaledInductionVariable

public class DerivedScaledInductionVariable
extends DerivedInductionVariable

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.loop.InductionVariable

InductionVariable.Direction

Field Summary

Fields inherited from class org.graalvm.compiler.loop.DerivedInductionVariable

base

Fields inherited from class org.graalvm.compiler.loop.InductionVariable

loop

Constructor Summary

Constructors

Constructor and Description
DerivedScaledInductionVariable(LoopEx loop, InductionVariable base, NegateNode value)
DerivedScaledInductionVariable(LoopEx loop, InductionVariable base, ValueNode scale, ValueNode value)

Method Summary

Modifier and Type	Method and Description
long	constantExtremum()
long	constantInit()
long	constantScale(InductionVariable ref) this = C * ref + n, returns C.
long	constantStride()
void	deleteUnusedNodes() Deletes any nodes created within the scope of this object that have no usages.
InductionVariable.Direction	direction()
ValueNode	exitValueNode() Returns the exit value of the induction variable.
ValueNode	extremumNode(boolean assumeLoopEntered, Stamp stamp)
ValueNode	getScale()
ValueNode	initNode() Returns the node that gives the initial value of this induction variable.
boolean	isConstantExtremum()
boolean	isConstantInit()
boolean	isConstantScale(InductionVariable ref) Is this = C * ref + n, C a constant?
boolean	isConstantStride()
boolean	offsetIsZero(InductionVariable ref) Is this = n * ref + 0?
ValueNode	offsetNode(InductionVariable ref) If this = n * ref + offset, returns offset or null otherwise.
ValueNode	strideNode() Returns the stride of the induction variable.
String	toString()
ValueNode	valueNode() Returns the value node that is described by this induction variable.

Methods inherited from class org.graalvm.compiler.loop.DerivedInductionVariable

getBase, graph

Methods inherited from class org.graalvm.compiler.loop.InductionVariable

extremumNode, getLoop

Methods inherited from class java.lang.Object

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

Constructor Detail

DerivedScaledInductionVariable

public DerivedScaledInductionVariable(LoopEx loop,
                                      InductionVariable base,
                                      ValueNode scale,
                                      ValueNode value)

DerivedScaledInductionVariable

public DerivedScaledInductionVariable(LoopEx loop,
                                      InductionVariable base,
                                      NegateNode value)

Method Detail

getScale

public ValueNode getScale()

valueNode

public ValueNode valueNode()

Description copied from class: InductionVariable

Returns the value node that is described by this induction variable.

Specified by:

valueNode in class InductionVariable

direction

public InductionVariable.Direction direction()

Specified by:

direction in class InductionVariable

initNode

public ValueNode initNode()

Description copied from class: InductionVariable

Returns the node that gives the initial value of this induction variable.

Specified by:

initNode in class InductionVariable

strideNode

public ValueNode strideNode()

Description copied from class: InductionVariable

Returns the stride of the induction variable. The stride is the value that is added to the induction variable at each iteration.

Specified by:

strideNode in class InductionVariable

isConstantInit

public boolean isConstantInit()

Specified by:

isConstantInit in class InductionVariable

isConstantStride

public boolean isConstantStride()

Specified by:

isConstantStride in class InductionVariable

constantInit

public long constantInit()

Specified by:

constantInit in class InductionVariable

constantStride

public long constantStride()

Specified by:

constantStride in class InductionVariable

extremumNode

public ValueNode extremumNode(boolean assumeLoopEntered,
                              Stamp stamp)

Specified by:

extremumNode in class InductionVariable

exitValueNode

public ValueNode exitValueNode()

Description copied from class: InductionVariable

Returns the exit value of the induction variable. The exit value is the value of the induction variable at the loop exit.

Specified by:

exitValueNode in class InductionVariable

isConstantExtremum

public boolean isConstantExtremum()

Specified by:

isConstantExtremum in class InductionVariable

constantExtremum

public long constantExtremum()

Specified by:

constantExtremum in class InductionVariable

deleteUnusedNodes

public void deleteUnusedNodes()

Description copied from class: InductionVariable

Deletes any nodes created within the scope of this object that have no usages.

Specified by:

deleteUnusedNodes in class InductionVariable

isConstantScale

public boolean isConstantScale(InductionVariable ref)

Description copied from class: InductionVariable

Is this = C * ref + n, C a constant?

Overrides:

isConstantScale in class InductionVariable

constantScale

public long constantScale(InductionVariable ref)

Description copied from class: InductionVariable

this = C * ref + n, returns C.

Overrides:

constantScale in class InductionVariable

offsetIsZero

public boolean offsetIsZero(InductionVariable ref)

Description copied from class: InductionVariable

Is this = n * ref + 0?

Overrides:

offsetIsZero in class InductionVariable

offsetNode

public ValueNode offsetNode(InductionVariable ref)

Description copied from class: InductionVariable

If this = n * ref + offset, returns offset or null otherwise.

Overrides:

offsetNode in class InductionVariable

toString

public String toString()

Overrides:

toString in class Object