#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*/ printf(char *, ...);
int /*<<< orphan*/ swap(int *, int *);
int main(void) {
  int a = 1111;
  int b = 9999;
  printf("%d \n", a);
  printf("%d \n", b);
  printf("swapping..\n");
  swap(&a, &b);
  printf("%d \n", a);
  printf("%d \n", b);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x457,-0x4(%rbp)
movl   $0x270f,-0x8(%rbp)
mov    -0x4(%rbp),%esi
lea    0xec0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x4(%rbp),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <swap@plt>
mov    -0x4(%rbp),%esi
lea    0xe83(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xe72(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
movl   $0x457,0xc(%rsp)
movl   $0x270f,0x8(%rsp)
lea    0xeb4(%rip),%rbx
mov    %rbx,%rdi
mov    $0x457,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x270f,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xe94(%rip),%rdi
call   1030 <puts@plt>
lea    0xc(%rsp),%rdi
lea    0x8(%rsp),%rsi
call   1050 <swap@plt>
mov    0xc(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%rsp),%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [5 x i8] c"%d \0A\00"
@.str.1 = [12 x i8] c"swapping..\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 1111, i32* %1
store i32 9999, i32* %2
%3 = load i32, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = load i32, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 @swap(i32* %1, i32* %2)
%9 = load i32, i32* %1
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %11)
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"%d \0A\00"
@str = [11 x i8] c"swapping..\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
store i32 1111, i32* %1
%4 = bitcast i32* %2 to i8*
store i32 9999, i32* %2
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 1111)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 9999)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
%8 = call i32 @swap(i32* %1, i32* %2)
%9 = load i32, i32* %1
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i32 %11)
ret i32 0
}