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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.graal.python.nodes.classes;

import static com.oracle.graal.python.nodes.SpecialAttributeNames.__BASES__;
import static com.oracle.graal.python.nodes.SpecialMethodNames.__GETATTRIBUTE__;

import com.oracle.graal.python.builtins.objects.tuple.PTuple;
import com.oracle.graal.python.nodes.PNodeWithContext;
import com.oracle.graal.python.nodes.SpecialMethodNames;
import com.oracle.graal.python.nodes.attributes.LookupInheritedAttributeNode;
import com.oracle.graal.python.nodes.call.CallNode;
import com.oracle.graal.python.nodes.call.special.LookupAndCallBinaryNode;
import com.oracle.graal.python.nodes.object.IsBuiltinClassProfile;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.dsl.GenerateUncached;
import com.oracle.truffle.api.dsl.ImportStatic;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.Frame;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.NodeInfo;

@NodeInfo(shortName = "cpython://Objects/abstract.c/abstract_get_bases")
@GenerateUncached
@ImportStatic({SpecialMethodNames.class})
public abstract class AbstractObjectGetBasesNode extends PNodeWithContext {
    public static AbstractObjectGetBasesNode create() {
        return AbstractObjectGetBasesNodeGen.create();
    }

    protected abstract PTuple executeInternal(Frame frame, Object cls);

    public final PTuple execute(VirtualFrame frame, Object cls) {
        return executeInternal(frame, cls);
    }

    @Specialization(guards = "!isUncached()")
    static PTuple getBasesCached(VirtualFrame frame, Object cls,
                    @Cached("create(GetAttribute)") LookupAndCallBinaryNode getAttributeNode,
                    @Shared("exceptionMaskProfile") @Cached IsBuiltinClassProfile exceptionMaskProfile) {
        try {
            Object bases = getAttributeNode.executeObject(frame, cls, __BASES__);
            if (bases instanceof PTuple) {
                return (PTuple) bases;
            }
        } catch (PException pe) {
            pe.expectAttributeError(exceptionMaskProfile);
        }
        return null;
    }

    @Specialization(replaces = "getBasesCached")
    static PTuple getBasesUncached(VirtualFrame frame, Object cls,
                    @Cached LookupInheritedAttributeNode.Dynamic lookupGetattributeNode,
                    @Cached CallNode callGetattributeNode,
                    @Shared("exceptionMaskProfile") @Cached IsBuiltinClassProfile exceptionMaskProfile) {
        Object getattr = lookupGetattributeNode.execute(cls, __GETATTRIBUTE__);
        try {
            Object bases = callGetattributeNode.execute(frame, getattr, cls, __BASES__);
            if (bases instanceof PTuple) {
                return (PTuple) bases;
            }
        } catch (PException pe) {
            pe.expectAttributeError(exceptionMaskProfile);
        }
        return null;
    }
}
