org.graalvm.compiler.core.amd64

Class AMD64CompressAddressLowering

java.lang.Object

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

org.graalvm.compiler.core.amd64.AMD64AddressLowering

org.graalvm.compiler.core.amd64.AMD64CompressAddressLowering

Direct Known Subclasses:

AMD64HotSpotAddressLowering

public abstract class AMD64CompressAddressLowering
extends AMD64AddressLowering

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AMD64CompressAddressLowering.HeapBaseNode

Constructor Summary

Constructors

Constructor and Description
AMD64CompressAddressLowering()

Method Summary

Modifier and Type	Method and Description
protected boolean	improve(StructuredGraph graph, DebugContext debug, AMD64AddressNode addr, boolean isBaseNegated, boolean isIndexNegated) Tries to optimize addresses so that they match the AMD64-specific addressing mode better (base + index * scale + displacement).
protected abstract boolean	improveUncompression(AMD64AddressNode addr, CompressionNode compression, ValueNode other)

Methods inherited from class org.graalvm.compiler.core.amd64.AMD64AddressLowering

lower, updateDisplacement

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

AMD64CompressAddressLowering

public AMD64CompressAddressLowering()

Method Detail

improve

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

Description copied from class: AMD64AddressLowering

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

Overrides:

improve in class AMD64AddressLowering

Parameters:

graph - the current graph

debug - the current debug context

addr - 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

improveUncompression

protected abstract boolean improveUncompression(AMD64AddressNode addr,
                                                CompressionNode compression,
                                                ValueNode other)