com.oracle.graal.nodes.calc

Class ShiftNode<OP>

java.lang.Object

com.oracle.graal.graph.Node

com.oracle.graal.nodes.ValueNode

com.oracle.graal.nodes.calc.FloatingNode

com.oracle.graal.nodes.calc.BinaryNode

com.oracle.graal.nodes.calc.ShiftNode<OP>

All Implemented Interfaces:

Node.ValueNumberable, Canonicalizable, Canonicalizable.Binary<ValueNode>, ArithmeticOperation, NarrowableArithmeticNode, ArithmeticLIRLowerable, Cloneable, Formattable, KindProvider

Direct Known Subclasses:

LeftShiftNode, RightShiftNode, UnsignedRightShiftNode

public abstract class ShiftNode<OP>
extends BinaryNode
implements ArithmeticLIRLowerable, NarrowableArithmeticNode

The ShiftOp class represents shift operations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static interface	ShiftNode.SerializableShiftFunction<T>

Nested classes/interfaces inherited from class com.oracle.graal.graph.Node

Node.ConstantNodeParameter, Node.InjectedNodeParameter, Node.Input, Node.NodeIntrinsic, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Nested classes/interfaces inherited from interface com.oracle.graal.graph.spi.Canonicalizable

Canonicalizable.Binary<T extends Node>, Canonicalizable.BinaryCommutative<T extends Node>, Canonicalizable.Unary<T extends Node>

Field Summary

Fields

Modifier and Type	Field and Description
protected ShiftNode.SerializableShiftFunction<OP>	getOp
static NodeClass<ShiftNode>	TYPE

Fields inherited from class com.oracle.graal.nodes.calc.BinaryNode

x, y

Fields inherited from class com.oracle.graal.nodes.ValueNode

stamp

Fields inherited from class com.oracle.graal.graph.Node

NODE_LIST, NOT_ITERABLE, USE_UNSAFE_TO_CLONE, WithAllEdges, WithNoEdges, WithOnlyInputEdges, WithOnlySucessorEdges

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ShiftNode(NodeClass<? extends ShiftNode<OP>> c, ShiftNode.SerializableShiftFunction<OP> getOp, ValueNode x, ValueNode s) Creates a new shift operation.

Method Summary

Modifier and Type	Method and Description
ValueNode	canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) Similar to Canonicalizable.canonical(CanonicalizerTool), except that implementations should act as if the current input of the node was the given one, i.e., they should never look at the inputs via the this pointer.
protected ArithmeticOpTable.ShiftOp<OP>	getOp(ValueNode forValue)
int	getShiftAmountMask()
boolean	inferStamp() This method can be overridden by subclasses of ValueNode if they need to recompute their stamp if their inputs change.
boolean	isNarrowable(int resultBits) Check whether this operation can be narrowed to resultBits bit without loss of precision.

Methods inherited from class com.oracle.graal.nodes.calc.BinaryNode

getX, getY, setX, setY

Methods inherited from class com.oracle.graal.nodes.calc.FloatingNode

asNode

Methods inherited from class com.oracle.graal.nodes.ValueNode

asConstant, asJavaConstant, getKind, graph, isAllowedUsageType, isConstant, isConstantPredicate, isNullConstant, setStamp, stamp, updateStamp

Methods inherited from class com.oracle.graal.graph.Node

acceptInputs, acceptSuccessors, afterClone, assertFalse, assertTrue, cfgPredecessors, cfgSuccessors, clearInputs, clearSuccessors, copyWithInputs, copyWithInputs, equals, fail, formatTo, getDebugProperties, getDebugProperties, getId, getNodeClass, getUsageAt, getUsageCount, hashCode, hasNoUsages, hasUsages, inputs, isAlive, isDeleted, markDeleted, modCount, newIdentityMap, newIdentityMap, newIdentityMap, newMap, newMap, newMap, newSet, newSet, predecessor, pushInputs, removeUsage, replaceAndDelete, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceFirstInput, replaceFirstSuccessor, safeDelete, simplify, successors, toString, toString, updatePredecessor, updateUsages, updateUsagesInterface, usages, valueEquals, verify, verifyEdges, verifyInputs

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.oracle.graal.nodes.spi.ArithmeticLIRLowerable

generate

Methods inherited from interface com.oracle.graal.graph.spi.Canonicalizable.Binary

canonical

Field Detail

TYPE

public static final NodeClass<ShiftNode> TYPE

getOp

protected final ShiftNode.SerializableShiftFunction<OP> getOp

Constructor Detail

ShiftNode

protected ShiftNode(NodeClass<? extends ShiftNode<OP>> c,
                    ShiftNode.SerializableShiftFunction<OP> getOp,
                    ValueNode x,
                    ValueNode s)

Creates a new shift operation.

Parameters:

x - the first input value

s - the second input value

Method Detail

getOp

protected final ArithmeticOpTable.ShiftOp<OP> getOp(ValueNode forValue)

inferStamp

public boolean inferStamp()

Description copied from class: ValueNode

This method can be overridden by subclasses of ValueNode if they need to recompute their stamp if their inputs change. A typical implementation will compute the stamp and pass it to ValueNode.updateStamp(Stamp), whose return value can be used as the result of this method.

Overrides:

inferStamp in class ValueNode

Returns:

true if the stamp has changed, false otherwise.

canonical

public ValueNode canonical(CanonicalizerTool tool,
                           ValueNode forX,
                           ValueNode forY)

Description copied from interface: Canonicalizable.Binary

Similar to Canonicalizable.canonical(CanonicalizerTool), except that implementations should act as if the current input of the node was the given one, i.e., they should never look at the inputs via the this pointer.

Specified by:

canonical in interface Canonicalizable.Binary<ValueNode>

getShiftAmountMask

public int getShiftAmountMask()

isNarrowable

public boolean isNarrowable(int resultBits)

Description copied from interface: NarrowableArithmeticNode

Check whether this operation can be narrowed to resultBits bit without loss of precision.

Specified by:

isNarrowable in interface NarrowableArithmeticNode