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 * Copyright (c) 2016, Oracle and/or its affiliates.
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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
 * 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.parser.model.symbols.instructions;

import com.oracle.truffle.llvm.parser.model.enums.CastOperator;
import com.oracle.truffle.llvm.parser.model.symbols.Symbols;
import com.oracle.truffle.llvm.parser.model.visitors.InstructionVisitor;
import com.oracle.truffle.llvm.runtime.types.Type;
import com.oracle.truffle.llvm.runtime.types.symbols.Symbol;
import com.oracle.truffle.llvm.runtime.types.symbols.ValueSymbol;

public final class CastInstruction extends ValueInstruction {

    private final CastOperator operator;

    private Symbol value;

    private CastInstruction(Type type, CastOperator operator) {
        super(type);
        this.operator = operator;
    }

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

    @Override
    public int getAlign() {
        return ((ValueSymbol) value).getAlign();
    }

    public CastOperator getOperator() {
        return operator;
    }

    public Symbol getValue() {
        return value;
    }

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

    public static CastInstruction fromSymbols(Symbols symbols, Type type, int opcode, int value) {
        final CastInstruction inst = new CastInstruction(type, CastOperator.decode(opcode));
        inst.value = symbols.getSymbol(value, inst);
        return inst;
    }

    @Override
    public String toString() {
        return String.format("(%s) %s", operator, value);
    }
}