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 * 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
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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
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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package com.oracle.truffle.llvm.nodes.control;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.ExplodeLoop;
import com.oracle.truffle.api.nodes.UnexpectedResultException;
import com.oracle.truffle.api.source.SourceSection;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMControlFlowNode;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

public class LLVMIndirectBranchNode extends LLVMControlFlowNode {

    @Child private LLVMExpressionNode address;
    @CompilationFinal(dimensions = 2) private final LLVMExpressionNode[][] phiWriteNodes;
    @CompilationFinal(dimensions = 1) private final int[] successors;

    public LLVMIndirectBranchNode(LLVMExpressionNode address, int[] indices, LLVMExpressionNode[][] phiWriteNodes, SourceSection sourceSection) {
        super(sourceSection);
        assert indices.length > 1;
        this.successors = indices;
        this.address = address;
        this.phiWriteNodes = phiWriteNodes;
    }

    @Override
    public int getSuccessorCount() {
        return successors.length;
    }

    @ExplodeLoop
    public void writePhis(VirtualFrame frame, int successorIndex) {
        LLVMExpressionNode[] phis = phiWriteNodes[successorIndex];
        for (int i = 0; i < phis.length; i++) {
            phis[i].executeGeneric(frame);
        }
    }

    public int executeCondition(VirtualFrame frame) {
        try {
            return (int) address.executeLLVMAddress(frame).getVal();
        } catch (UnexpectedResultException e) {
            CompilerDirectives.transferToInterpreter();
            throw new IllegalStateException("should not reach here", e);
        }
    }

    public int[] getSuccessors() {
        return successors;
    }
}