package midend.llvm.instr;

import midend.llvm.type.IrInterType;
import midend.llvm.type.IrPointerType;
import backend.mips.instr.fake.MipsLa;
import midend.llvm.constant.IrConstantStr;
import backend.mips.instr.fake.MipsLi;
import backend.mips.instr.MipsSyscall;
import backend.mips.Register;

public class PutStrInstr extends IrInstr {
    private IrConstantStr strVal;

    public PutStrInstr(String name, IrConstantStr putValue) {
        super(IrInterType.VOID, name, IrInstrType.IO);
        addUse(putValue);
        strVal = putValue;
    }

    public static String putStrDecl() {
        return "declare void @putstr(i8*)";
    }

    public String toString() {
        IrPointerType ptrType = (IrPointerType) strVal.getType();
        return "call void @putstr(i8* getelementptr inbounds ("
                + ptrType.getPointeeType() + ", " + ptrType + 
                " " + strVal.getName() + ", i32 0, i32 0))";
    }

    public void toMips() {
        new MipsLa(Register.A0, strVal.getMipsLabel());
        new MipsLi(Register.V0, 4);
        new MipsSyscall();
    }
}