/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates.
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 * All rights reserved.
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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.
 *
 * 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.
 *
 * 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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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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package com.oracle.truffle.llvm.parser.model.symbols.instructions;

import com.oracle.truffle.llvm.parser.model.SymbolTable;
import com.oracle.truffle.llvm.parser.model.visitors.SymbolVisitor;
import com.oracle.truffle.llvm.runtime.types.Type;
import com.oracle.truffle.llvm.parser.model.SymbolImpl;

public final class InsertValueInstruction extends ValueInstruction {

    private SymbolImpl aggregate;

    private SymbolImpl value;

    private final int index;

    private InsertValueInstruction(Type type, int index) {
        super(type);
        this.index = index;
    }

    @Override
    public void accept(SymbolVisitor visitor) {
        visitor.visit(this);
    }

    public SymbolImpl getAggregate() {
        return aggregate;
    }

    public int getIndex() {
        return index;
    }

    public SymbolImpl getValue() {
        return value;
    }

    @Override
    public void replace(SymbolImpl original, SymbolImpl replacement) {
        if (aggregate == original) {
            aggregate = replacement;
        }
        if (value == original) {
            value = replacement;
        }
    }

    public static InsertValueInstruction fromSymbols(SymbolTable symbols, Type type, int aggregate, int index, int value) {
        final InsertValueInstruction inst = new InsertValueInstruction(type, index);
        inst.aggregate = symbols.getForwardReferenced(aggregate, inst);
        inst.value = symbols.getForwardReferenced(value, inst);
        return inst;
    }
}