$ cat yoba.cpp
#include <tuple>

using namespace std;

struct YOBA {
    int x;

    bool operator == (const YOBA &otherYoba) const
    {
        return x == otherYoba.x;
    }
};


bool unique_f (int a1, char a2, YOBA a3, int b1, char b2, YOBA b3)
{
    return (tie (a1, a2, a3) == tie (b1, b2, b3));
}
$ g++ -O2 -std=c++11 -c yoba.cpp
$ objdump -d --demangle yoba.o

yoba.o:     формат файла elf32-i386


Дизассемблирование раздела .text:

00000000 <unique_f(int, char, YOBA, int, char, YOBA)>:
   0:   53                      push   %ebx
   1:   8b 5c 24 08             mov    0x8(%esp),%ebx
   5:   31 c0                   xor    %eax,%eax
   7:   39 5c 24 14             cmp    %ebx,0x14(%esp)
   b:   8b 54 24 0c             mov    0xc(%esp),%edx
   f:   8b 4c 24 18             mov    0x18(%esp),%ecx
  13:   74 03                   je     18 <unique_f(int, char, YOBA, int, char, YOBA)+0x18>
  15:   5b                      pop    %ebx
  16:   c3                      ret
  17:   90                      nop
  18:   38 d1                   cmp    %dl,%cl
  1a:   75 f9                   jne    15 <unique_f(int, char, YOBA, int, char, YOBA)+0x15>
  1c:   8b 44 24 1c             mov    0x1c(%esp),%eax
  20:   39 44 24 10             cmp    %eax,0x10(%esp)
  24:   5b                      pop    %ebx
  25:   0f 94 c0                sete   %al
  28:   c3                      ret
$