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package org.graalvm.compiler.nodes.spi;

import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.memory.address.AddressNode;
import org.graalvm.compiler.options.OptionValues;

import jdk.vm.ci.meta.JavaKind;

Provides a capability for replacing a higher node with one or more lower level nodes.
/**
 * Provides a capability for replacing a higher node with one or more lower level nodes.
 */
public interface LoweringProvider {

    void lower(Node n, LoweringTool tool);

    
Reconstructs the array index from an address node that was created as a lowering of an
indexed access to an array.
Params:
elementKind – the JavaKind of the array elements
address – an AddressNode pointing to an element in an array
Returns:
a node that gives the index of the element/**
     * Reconstructs the array index from an address node that was created as a lowering of an
     * indexed access to an array.
     *
     * @param elementKind the {@link JavaKind} of the array elements
     * @param address an {@link AddressNode} pointing to an element in an array
     * @return a node that gives the index of the element
     */
    ValueNode reconstructArrayIndex(JavaKind elementKind, AddressNode address);

    
Indicates the smallest width for comparing an integer value on the target platform.
/**
     * Indicates the smallest width for comparing an integer value on the target platform.
     */
    Integer smallestCompareWidth();

    
Indicates whether this target platform supports bulk zeroing of arbitrary size.
/**
     * Indicates whether this target platform supports bulk zeroing of arbitrary size.
     */
    boolean supportsBulkZeroing();

    
Indicates whether this target platform supports optimized filling of memory regions with long values. /**
     * Indicates whether this target platform supports optimized filling of memory regions with
     * {@code long} values.
     */
    boolean supportsOptimizedFilling(OptionValues options);
}