Abbreviated Function Templates

C++20 function:

void myTemplateFunc(auto param) {}

is equivalent to pre C++20:

template <typename T> void myTemplateFunc(T param){}

1. Comparison

C++20 auto:

main:
 push   rbp
 mov    rbp,rsp
 sub    rsp,0x10
 mov    DWORD PTR [rbp-0x4],0x0
 mov    eax,DWORD PTR [rbp-0x4]
 mov    edi,eax
 call   401126 <void myTemplateFunc<int>(int)>
 mov    eax,0x0
 leave
 ret
void myTemplateFunc<int>(int):
 push   rbp
 mov    rbp,rsp
 mov    DWORD PTR [rbp-0x4],edi
 nop
 pop    rbp
 ret

Template function:

main:
 push   rbp
 mov    rbp,rsp
 sub    rsp,0x10
 mov    DWORD PTR [rbp-0x4],0x0
 mov    eax,DWORD PTR [rbp-0x4]
 mov    edi,eax
 call   401126 <void myTemplateFunc<int>(int)>
 mov    eax,0x0
 leave
 ret
void myTemplateFunc<int>(int):
 push   rbp
 mov    rbp,rsp
 mov    DWORD PTR [rbp-0x4],edi
 nop
 pop    rbp
 ret

https://godbolt.org/z/541efE1or