if x.val.Kind() == constant.Int && constant.BitLen(x.val) > prec {
		op := opName(x.expr)
		if op != "" {
			op += " "
		}
		check.errorf(atPos(opPos), InvalidConstVal, "constant %soverflow", op)
		x.val = constant.MakeUnknown()
	}
}

// representableConst reports whether x can be represented as
// value of the given basic type and for the configuration
// provided (only needed for int/uint sizes).

	if x.val.Kind() == constant.Int && constant.BitLen(x.val) > prec {
		op := opName(x.expr)
		if op != "" {
			op += " "
		}
		check.errorf(atPos(opPos), InvalidConstVal, "constant %soverflow", op)
		x.val = constant.MakeUnknown()
	}
}

// representableConst reports whether x can be represented as
// value of the given basic type and for the configuration
// provided (only needed for int/uint sizes).