Visual C++でプロジェクトを作っていれば，アッセンブリ出力という機能が使えることを知った。
プロジェクトのプロパティで[C/C++]->[すべてのオプション]->アッセンブリの出力で「アッセンブリコード、コンピューター語、ソースコード(/FAcs)」を出力するようにすれば，
#include "stdafx.h"
int main()
{
signed char a;
short b;
int c;
a = -10;
b = 20;
c = 30;
c = a + b + c;
return 0;
}
このコードが，*.codファイルに出力される。
; Listing generated by Microsoft (R) Optimizing Compiler Version 19.13.26129.0 TITLE E:\start001\ConsoleApplication1\ConsoleApplication1.cpp .686P .XMM include listing.inc .model flat INCLUDELIB MSVCRTD INCLUDELIB OLDNAMES PUBLIC _main EXTRN __RTC_InitBase:PROC EXTRN __RTC_Shutdown:PROC ; COMDAT rtc$TMZ rtc$TMZ SEGMENT __RTC_Shutdown.rtc$TMZ DD FLAT:__RTC_Shutdown rtc$TMZ ENDS ; COMDAT rtc$IMZ rtc$IMZ SEGMENT __RTC_InitBase.rtc$IMZ DD FLAT:__RTC_InitBase rtc$IMZ ENDS ; Function compile flags: /Odtp /RTCsu /ZI ; File c:\start001\consoleapplication1\consoleapplication1.cpp ; COMDAT _main _TEXT SEGMENT _c$ = -32 ; size = 4 _b$ = -20 ; size = 2 _a$ = -5 ; size = 1 _main PROC ; COMDAT 00000 55 push ebp 00001 8b ec mov ebp, esp 00003 81 ec e4 00 00 00 sub esp, 228 ; 000000e4H 00009 53 push ebx 0000a 56 push esi 0000b 57 push edi 0000c 8d bd 1c ff ff ff lea edi, DWORD PTR [ebp-228] 00012 b9 39 00 00 00 mov ecx, 57 ; 00000039H 00017 b8 cc cc cc cc mov eax, -858993460 ; ccccccccH 0001c f3 ab rep stosd 0001e c6 45 fb f6 mov BYTE PTR _a$[ebp], -10 ; fffffff6H 00022 b8 14 00 00 00 mov eax, 20 ; 00000014H 00027 66 89 45 ec mov WORD PTR _b$[ebp], ax 0002b c7 45 e0 1e 00 00 00 mov DWORD PTR _c$[ebp], 30 ; 0000001eH 00032 0f be 45 fb movsx eax, BYTE PTR _a$[ebp] 00036 0f bf 4d ec movsx ecx, WORD PTR _b$[ebp] 0003a 03 45 e0 add eax, DWORD PTR _c$[ebp] 0003d 03 c8 add ecx, eax 0003f 89 4d e0 mov DWORD PTR _c$[ebp], ecx 00042 33 c0 xor eax, eax 00044 5f pop edi 00045 5e pop esi 00046 5b pop ebx 00047 8b e5 mov esp, ebp 00049 5d pop ebp 0004a c3 ret 0 _main ENDP _TEXT ENDS END
x64の場合には以下のようになる
; Listing generated by Microsoft (R) Optimizing Compiler Version 19.13.26129.0 include listing.inc INCLUDELIB MSVCRTD INCLUDELIB OLDNAMES PUBLIC main EXTRN _RTC_InitBase:PROC EXTRN _RTC_Shutdown:PROC ; COMDAT pdata pdata SEGMENT $pdata$main DD imagerel $LN3 DD imagerel $LN3+82 DD imagerel $unwind$main pdata ENDS ; COMDAT rtc$TMZ rtc$TMZ SEGMENT _RTC_Shutdown.rtc$TMZ DQ FLAT:_RTC_Shutdown rtc$TMZ ENDS ; COMDAT rtc$IMZ rtc$IMZ SEGMENT _RTC_InitBase.rtc$IMZ DQ FLAT:_RTC_InitBase rtc$IMZ ENDS ; COMDAT xdata xdata SEGMENT $unwind$main DD 05051c01H DD 010a030dH DD 070030025H DD 05002H xdata ENDS ; Function compile flags: /Odtp /RTCsu /ZI ; File e:\start001\consoleapplication1\consoleapplication1.cpp ; COMDAT main _TEXT SEGMENT a$ = 4 b$ = 36 c$ = 68 main PROC ; COMDAT $LN3: 00000 40 55 push rbp 00002 57 push rdi 00003 48 81 ec 28 01 00 00 sub rsp, 296 ; 00000128H 0000a 48 8b ec mov rbp, rsp 0000d 48 8b fc mov rdi, rsp 00010 b9 4a 00 00 00 mov ecx, 74 ; 0000004aH 00015 b8 cc cc cc cc mov eax, -858993460 ; ccccccccH 0001a f3 ab rep stosd 0001c c6 45 04 f6 mov BYTE PTR a$[rbp], -10 00020 b8 14 00 00 00 mov eax, 20 00025 66 89 45 24 mov WORD PTR b$[rbp], ax 00029 c7 45 44 1e 00 00 00 mov DWORD PTR c$[rbp], 30 00030 0f be 45 04 movsx eax, BYTE PTR a$[rbp] 00034 0f bf 4d 24 movsx ecx, WORD PTR b$[rbp] 00038 8b 55 44 mov edx, DWORD PTR c$[rbp] 0003b 03 d0 add edx, eax 0003d 8b c2 mov eax, edx 0003f 03 c8 add ecx, eax 00041 8b c1 mov eax, ecx 00043 89 45 44 mov DWORD PTR c$[rbp], eax 00046 33 c0 xor eax, eax 00048 48 8d a5 28 01 00 00 lea rsp, QWORD PTR [rbp+296] 0004f 5f pop rdi 00050 5d pop rbp 00051 c3 ret 0 main ENDP _TEXT ENDS END
