=> 0x7fac6d152cd0 <g_type_check_instance_cast+64>:	movzbl 0x16(%rdi),%eax
   0x7fac6d152cd4 <g_type_check_instance_cast+68>:	shr    $0x2,%al
   0x7fac6d152cd7 <g_type_check_instance_cast+71>:	mov    %eax,%edx
   0x7fac6d152cd9 <g_type_check_instance_cast+73>:	mov    %eax,%r13d
   0x7fac6d152cdc <g_type_check_instance_cast+76>:	and    $0x1,%edx
   0x7fac6d152cdf <g_type_check_instance_cast+79>:	and    $0x1,%r13d
   0x7fac6d152ce3 <g_type_check_instance_cast+83>:	cmp    $0x3fc,%rbx
   0x7fac6d152cea <g_type_check_instance_cast+90>:	jbe    0x7fac6d152de0 <g_type_check_instance_cast+336>
   0x7fac6d152cf0 <g_type_check_instance_cast+96>:	mov    %rbx,%rsi
   0x7fac6d152cf3 <g_type_check_instance_cast+99>:	and    $0xfffffffffffffffc,%rsi
   0x7fac6d152cf7 <g_type_check_instance_cast+103>:	test   %rsi,%rsi
   0x7fac6d152cfa <g_type_check_instance_cast+106>:	je     0x7fac6d152d04 <g_type_check_instance_cast+116>
   0x7fac6d152cfc <g_type_check_instance_cast+108>:	test   %dl,%dl
   0x7fac6d152cfe <g_type_check_instance_cast+110>:	jne    0x7fac6d152ea0 <g_type_check_instance_cast+528>
   0x7fac6d152d04 <g_type_check_instance_cast+116>:	test   %r13d,%r13d
   0x7fac6d152d07 <g_type_check_instance_cast+119>:	lea    0x104f8(%rip),%r13        # 0x7fac6d163206