=> 0x7f7c2b34979d:	mov    (%r12),%rax
   0x7f7c2b3497a1:	test   %rax,%rax
   0x7f7c2b3497a4:	je     0x7f7c2b349878
   0x7f7c2b3497aa:	testb  $0x1,0x20(%rax)
   0x7f7c2b3497ae:	xchg   %ax,%ax
   0x7f7c2b3497b0:	je     0x7f7c2b349878
   0x7f7c2b3497b6:	lea    0x4107e3(%rip),%rsi        # 0x7f7c2b759fa0
   0x7f7c2b3497bd:	mov    %r12,%rdi
   0x7f7c2b3497c0:	callq  0x7f7c2b304b98 <objc_msg_lookup@plt>
   0x7f7c2b3497c5:	lea    0x4107d4(%rip),%rsi        # 0x7f7c2b759fa0
   0x7f7c2b3497cc:	mov    %r12,%rdi
   0x7f7c2b3497cf:	callq  *%rax
   0x7f7c2b3497d1:	mov    %eax,%r15d
   0x7f7c2b3497d4:	sub    %r14d,%eax
   0x7f7c2b3497d7:	movq   $0x0,-0x50(%rbp)
   0x7f7c2b3497df:	test   %r15d,%r15d