ven@HSLab ~/aaa $ g++ -S aaa.cpp
ven@HSLab ~/aaa $ cat aaa.s 
        .file   "aaa.cpp"
        .text
.globl _Z3fibi
        .type   _Z3fibi, @function
_Z3fibi:
.LFB0:
        .cfi_startproc
        pushq   %rbp
        .cfi_def_cfa_offset 16
        movq    %rsp, %rbp
        .cfi_offset 6, -16
        .cfi_def_cfa_register 6
        pushq   %rbx
        subq    $24, %rsp
        movl