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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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package org.graalvm.compiler.core.match;

import java.lang.annotation.ElementType;
import java.lang.annotation.Repeatable;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import org.graalvm.compiler.nodes.ValueNode;

Describes the properties of a node for use when building a MatchPattern. These declarations are required when parsing a MatchRule. They are expected to be found on a super type of the holder of the method declaring the MatchRule. /**
 * Describes the properties of a node for use when building a {@link MatchPattern}. These
 * declarations are required when parsing a {@link MatchRule}. They are expected to be found on a
 * super type of the holder of the method declaring the {@link MatchRule}.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Repeatable(value = MatchableNodes.class)
public @interface MatchableNode {

    
The ValueNode subclass this annotation describes. These annotations might work better if they were directly on the node being described but that may complicate the annotation processing. /**
     * The {@link ValueNode} subclass this annotation describes. These annotations might work better
     * if they were directly on the node being described but that may complicate the annotation
     * processing.
     */
    Class<? extends ValueNode> nodeClass();

    
The names of the inputs in the order they should appear in the match.
/**
     * The names of the inputs in the order they should appear in the match.
     */
    String[] inputs() default {};

    
Can a pattern be matched with the operands swapped. This will cause swapped versions of
patterns to be automatically generated.
/**
     * Can a pattern be matched with the operands swapped. This will cause swapped versions of
     * patterns to be automatically generated.
     */
    boolean commutative() default false;

    
Can a node with multiple uses be safely matched by a rule.
/**
     * Can a node with multiple uses be safely matched by a rule.
     */
    boolean shareable() default false;

    boolean ignoresSideEffects() default false;

    
Can a node be consumed by a matched rule regardless of whether it is shareable.
/**
     * Can a node be consumed by a matched rule regardless of whether it is shareable.
     */
    boolean consumable() default true;
}