pub const Alignment = enum(u6) {
    default = std.math.maxInt(u6),
    _,

    pub fn fromByteUnits(bytes: u64) Alignment {
        if (bytes == 0) return .default;
        assert(std.math.isPowerOfTwo(bytes));
        assert(bytes <= 1 << 32);
        return @enumFromInt(@ctz(bytes));
    }

    pub fn toByteUnits(self: Alignment) ?u64 {
        return if (self == .default) null else @as(u64, 1) << @intFromEnum(self);
    }

    pub fn toLlvm(self: Alignment) u6 {
        return if (self == .default) 0 else (@intFromEnum(self) + 1);
    }

    pub fn format(
        self: Alignment,
        comptime prefix: []const u8,
        _: std.fmt.FormatOptions,
        writer: anytype,
    ) @TypeOf(writer).Error!void {
        try writer.print("{s}align {d}", .{ prefix, self.toByteUnits() orelse return });
    }
}