Dump of assembler code for function example_4:
0x8048434 <example_4>:  	push   %ebp
0x8048435 <example_4+1>:        mov    %esp,%ebp
0x8048437 <example_4+3>:        mov    0x8(%ebp),%edx
0x804843a <example_4+6>:        xor    %eax,%eax
0x804843c <example_4+8>:        test   %edx,%edx
0x804843e <example_4+10>:       je     0x8048449 <example_4+21>
0x8048440 <example_4+12>:       add    0x4(%edx),%eax
0x8048443 <example_4+15>:       mov    (%edx),%edx
0x8048445 <example_4+17>:       test   %edx,%edx
0x8048447 <example_4+19>:       jne    0x8048440 <example_4+12>
0x8048449 <example_4+21>:       mov    %ebp,%esp
0x804844b <example_4+23>:       pop    %ebp
0x804844c <example_4+24>:       ret