#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ print(char *, int);
int main(int argc, char **argv) {
  print("__MSDOS__", 0);
  print("IBMPC_SYSTEM", 0);
  print("REAL_UNIX_SYSTEM", 0);
  print("__os2__", 0);
  print("__WIN32__", 0);
  print("__unix__", 1);
  print("__GO32__", 0);
  print("__DJGPP__", 0);
  print("__MSDOS_16BIT__", 0);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xed3(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xecf(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xece(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xed1(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xecb(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xec7(%rip),%rdi
mov    $0x1,%esi
call   1030 <print@plt>
lea    0xebf(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xeba(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xeb6(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xee8(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xee4(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xee3(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xee6(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xee0(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xedc(%rip),%rdi
mov    $0x1,%esi
call   1030 <print@plt>
lea    0xed4(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xecf(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
lea    0xecb(%rip),%rdi
xor    %esi,%esi
call   1030 <print@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [10 x i8] c"__MSDOS__\00"
@.str.1 = [13 x i8] c"IBMPC_SYSTEM\00"
@.str.2 = [17 x i8] c"REAL_UNIX_SYSTEM\00"
@.str.3 = [8 x i8] c"__os2__\00"
@.str.4 = [10 x i8] c"__WIN32__\00"
@.str.5 = [9 x i8] c"__unix__\00"
@.str.6 = [9 x i8] c"__GO32__\00"
@.str.7 = [10 x i8] c"__DJGPP__\00"
@.str.8 = [16 x i8] c"__MSDOS_16BIT__\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i32 0)
%7 = call i32 @print(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 0)
%8 = call i32 @print(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 0)
%9 = call i32 @print(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i32 0)
%10 = call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i32 0)
%11 = call i32 @print(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0), i32 1)
%12 = call i32 @print(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i32 0)
%13 = call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.7, i64 0, i64 0), i32 0)
%14 = call i32 @print(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.8, i64 0, i64 0), i32 0)
ret i32 0
}

LLVM IR (-O2):
@.str = [10 x i8] c"__MSDOS__\00"
@.str.1 = [13 x i8] c"IBMPC_SYSTEM\00"
@.str.2 = [17 x i8] c"REAL_UNIX_SYSTEM\00"
@.str.3 = [8 x i8] c"__os2__\00"
@.str.4 = [10 x i8] c"__WIN32__\00"
@.str.5 = [9 x i8] c"__unix__\00"
@.str.6 = [9 x i8] c"__GO32__\00"
@.str.7 = [10 x i8] c"__DJGPP__\00"
@.str.8 = [16 x i8] c"__MSDOS_16BIT__\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i32 0)
%4 = tail call i32 @print(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 0)
%5 = tail call i32 @print(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 0)
%6 = tail call i32 @print(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i32 0)
%7 = tail call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i32 0)
%8 = tail call i32 @print(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0), i32 1)
%9 = tail call i32 @print(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.6, i64 0, i64 0), i32 0)
%10 = tail call i32 @print(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.7, i64 0, i64 0), i32 0)
%11 = tail call i32 @print(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.8, i64 0, i64 0), i32 0)
ret i32 0
}