org.graalvm.compiler.core.amd64

Class AMD64AddressLowering

java.lang.Object

org.graalvm.compiler.phases.common.AddressLoweringPhase.AddressLowering

org.graalvm.compiler.core.amd64.AMD64AddressLowering

Direct Known Subclasses:

AMD64CompressAddressLowering

public class AMD64AddressLowering
extends AddressLoweringPhase.AddressLowering

Constructor Summary

Constructors

Constructor and Description
AMD64AddressLowering()

Method Summary

Modifier and Type	Method and Description
protected boolean	improve(StructuredGraph graph, DebugContext debug, AMD64AddressNode ret, boolean isBaseNegated, boolean isIndexNegated) Tries to optimize addresses so that they match the AMD64-specific addressing mode better (base + index * scale + displacement).
AddressNode	lower(ValueNode base, ValueNode offset)
protected static boolean	updateDisplacement(AMD64AddressNode address, long displacementDelta, boolean negateDelta)

Methods inherited from class org.graalvm.compiler.phases.common.AddressLoweringPhase.AddressLowering

postProcess, preProcess

Methods inherited from class java.lang.Object

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

Constructor Detail

AMD64AddressLowering

public AMD64AddressLowering()

Method Detail

lower

public AddressNode lower(ValueNode base,
                         ValueNode offset)

Specified by:

lower in class AddressLoweringPhase.AddressLowering

improve

protected boolean improve(StructuredGraph graph,
                          DebugContext debug,
                          AMD64AddressNode ret,
                          boolean isBaseNegated,
                          boolean isIndexNegated)

Tries to optimize addresses so that they match the AMD64-specific addressing mode better (base + index * scale + displacement).

Parameters:

graph - the current graph

debug - the current debug context

ret - the address that should be optimized

isBaseNegated - determines if the address base is negated. if so, all values that are extracted from the base will be negated as well

isIndexNegated - determines if the index is negated. if so, all values that are extracted from the index will be negated as well

Returns:

true if the address was modified

updateDisplacement

protected static boolean updateDisplacement(AMD64AddressNode address,
                                            long displacementDelta,
                                            boolean negateDelta)