=> 0x7faf80c873d5 <cairo_region_reference+5>:	mov    (%rdi),%eax
   0x7faf80c873d7 <cairo_region_reference+7>:	cmp    $0xffffffff,%eax
   0x7faf80c873da <cairo_region_reference+10>:	je     0x7faf80c873f0 <cairo_region_reference+32>
   0x7faf80c873dc <cairo_region_reference+12>:	test   %eax,%eax
   0x7faf80c873de <cairo_region_reference+14>:	jle    0x7faf80c873f3 <cairo_region_reference+35>
   0x7faf80c873e0 <cairo_region_reference+16>:	lock addl $0x1,(%rdi)
   0x7faf80c873e4 <cairo_region_reference+20>:	mov    %rdi,%rax
   0x7faf80c873e7 <cairo_region_reference+23>:	retq   
   0x7faf80c873e8 <cairo_region_reference+24>:	nopl   0x0(%rax,%rax,1)
   0x7faf80c873f0 <cairo_region_reference+32>:	xor    %eax,%eax
   0x7faf80c873f2 <cairo_region_reference+34>:	retq   
   0x7faf80c873f3 <cairo_region_reference+35>:	lea    0x72ea6(%rip),%rcx        # 0x7faf80cfa2a0
   0x7faf80c873fa <cairo_region_reference+42>:	push   %rax
   0x7faf80c873fb <cairo_region_reference+43>:	lea    0x72dbe(%rip),%rsi        # 0x7faf80cfa1c0
   0x7faf80c87402 <cairo_region_reference+50>:	lea    0x72e1f(%rip),%rdi        # 0x7faf80cfa228
   0x7faf80c87409 <cairo_region_reference+57>:	mov    $0x191,%edx