=> 0x7f2c7a7b379d:	mov    (%r12),%rax
   0x7f2c7a7b37a1:	test   %rax,%rax
   0x7f2c7a7b37a4:	je     0x7f2c7a7b3878
   0x7f2c7a7b37aa:	testb  $0x1,0x20(%rax)
   0x7f2c7a7b37ae:	xchg   %ax,%ax
   0x7f2c7a7b37b0:	je     0x7f2c7a7b3878
   0x7f2c7a7b37b6:	lea    0x4107e3(%rip),%rsi        # 0x7f2c7abc3fa0
   0x7f2c7a7b37bd:	mov    %r12,%rdi
   0x7f2c7a7b37c0:	callq  0x7f2c7a76eb98 <objc_msg_lookup@plt>
   0x7f2c7a7b37c5:	lea    0x4107d4(%rip),%rsi        # 0x7f2c7abc3fa0
   0x7f2c7a7b37cc:	mov    %r12,%rdi
   0x7f2c7a7b37cf:	callq  *%rax
   0x7f2c7a7b37d1:	mov    %eax,%r15d
   0x7f2c7a7b37d4:	sub    %r14d,%eax
   0x7f2c7a7b37d7:	movq   $0x0,-0x50(%rbp)
   0x7f2c7a7b37df:	test   %r15d,%r15d