#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 */
scalar_t__ litend();
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  printf("#ifndef ENDIAN_H\n");
  printf("#define ENDIAN_H\n");
  printf("#define __LITTLE_ENDIAN 1234\n");
  printf("#define __BIG_ENDIAN    4321\n");
  printf("#define __BYTE_ORDER __%s_ENDIAN\n", litend() ? "LITTLE" : "BIG");
  printf("#endif\n");
  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    0xec3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xecb(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xedb(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1030 <litend@plt>
mov    %rax,%rcx
lea    0xf0a(%rip),%rsi
lea    0xefc(%rip),%rax
cmp    $0x0,%rcx
cmovne %rax,%rsi
lea    0xecb(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeea(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xef5(%rip),%rdi
call   1040 <puts@plt>
lea    0xefa(%rip),%rdi
call   1040 <puts@plt>
lea    0xeff(%rip),%rdi
call   1040 <puts@plt>
lea    0xf10(%rip),%rdi
call   1040 <puts@plt>
xor    %eax,%eax
call   1030 <litend@plt>
test   %rax,%rax
lea    0xeb7(%rip),%rax
lea    0xea9(%rip),%rsi
cmove  %rax,%rsi
lea    0xe7c(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xef7(%rip),%rdi
call   1040 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [18 x i8] c"#ifndef ENDIAN_H\0A\00"
@.str.1 = [18 x i8] c"#define ENDIAN_H\0A\00"
@.str.2 = [30 x i8] c"#define __LITTLE_ENDIAN 1234\0A\00"
@.str.3 = [30 x i8] c"#define __BIG_ENDIAN 4321\0A\00"
@.str.4 = [34 x i8] c"#define __BYTE_ORDER __%s_ENDIAN\0A\00"
@.str.5 = [7 x i8] c"LITTLE\00"
@.str.6 = [4 x i8] c"BIG\00"
@.str.7 = [8 x i8] c"#endif\0A\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 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.3, i64 0, i64 0))
%10 = call i64 (...) @litend()
%11 = icmp ne i64 %10, 0
%12 = zext i1 %11 to i64
%13 = select i1 %11, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0)
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.4, i64 0, i64 0), i8* %13)
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.7, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.4 = [34 x i8] c"#define __BYTE_ORDER __%s_ENDIAN\0A\00"
@.str.5 = [7 x i8] c"LITTLE\00"
@.str.6 = [4 x i8] c"BIG\00"
@str = [17 x i8] c"#ifndef ENDIAN_H\00"
@str.8 = [17 x i8] c"#define ENDIAN_H\00"
@str.9 = [29 x i8] c"#define __LITTLE_ENDIAN 1234\00"
@str.10 = [29 x i8] c"#define __BIG_ENDIAN 4321\00"
@str.11 = [7 x i8] c"#endif\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @str.8, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str.9, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str.10, i64 0, i64 0))
%7 = tail call i64 (...) @litend()
%8 = icmp eq i64 %7, 0
%9 = select i1 %8, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.4, i64 0, i64 0), i8* %9)
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @str.11, i64 0, i64 0))
ret i32 0
}