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 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.runtime.nodes.others;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.GenerateWrapper;
import com.oracle.truffle.api.instrumentation.InstrumentableNode;
import com.oracle.truffle.api.instrumentation.ProbeNode;
import com.oracle.truffle.api.nodes.ControlFlowException;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMControlFlowNode;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMStatementNode;

@GenerateWrapper
public abstract class LLVMUnreachableNode extends LLVMControlFlowNode {

    public static class LLVMUnreachableException extends ControlFlowException {
        private static final long serialVersionUID = 1L;
    }

    @Override
    public int getSuccessorCount() {
        return 0;
    }

    @Override
    public int[] getSuccessors() {
        return new int[]{};
    }

    @Override
    public LLVMStatementNode getPhiNode(int successorIndex) {
        return null;
    }

    public abstract void execute(VirtualFrame frame);

    @Specialization
    void doUnreachable() {
        CompilerDirectives.transferToInterpreter();
        throw new LLVMUnreachableException();
    }

    @Override
    public InstrumentableNode.WrapperNode createWrapper(ProbeNode probe) {
        return new LLVMUnreachableNodeWrapper(this, probe);
    }
}