ASM code generation using the cool -FA compiler switch

Recently I was try to experiment with some calling conventions and I wanted to look at the assembly code, to better understand the behavior.
There are couple of ways.
1. Look the dis-assembly while debugging.
2. use the very cool ollydbg!
3. Generate one for yourself while building the binary!!
That is where the magical compiler -FAs switch comes in the play. Following was the code I test it with

***********************************************************************
my 'C' code
void foo()
{
 printf("in foo");
 
}

// This code is compiled using compiler flag -FAs switch to generate and equivalent ASM code
int _tmain(int argc, _TCHAR* argv[])
{
 foo();
 return 0;
}
************************************************************************
************************************************************************
Generated Assembly code(I have only shown the main portion of the code)
PUBLIC _wmain
; Function compile flags: /Odtp /RTCsu /ZI
; COMDAT _wmain
_TEXT SEGMENT
_argc$ = 8      ; size = 4
_argv$ = 12      ; size = 4
_wmain PROC      ; COMDAT

; 16   : {

 push ebp
 mov ebp, esp
 sub esp, 192    ; 000000c0H
 push ebx
 push esi
 push edi
 lea edi, DWORD PTR [ebp-192]
 mov ecx, 48     ; 00000030H
 mov eax, -858993460    ; ccccccccH
 rep stosd

; 17   :  foo();

 call ?foo@@YAXXZ    ; foo    //call to foo

; 18   :  return 0;

 xor eax, eax

; 19   : }

 pop edi
 pop esi
 pop ebx
 add esp, 192    ; 000000c0H
 cmp ebp, esp
 call __RTC_CheckEsp
 mov esp, ebp
 pop ebp
 ret 0
*******************************************************************************************

Nevertheless a nice way to look at the Assembly code!