#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 = 11, b = 3;
  printf("===== before swapping =====\n");
  printf("a: %d, b: %d\n", a, b);
  swap(&a, &b);
  printf("===== after swapping =====\n");
  printf("a: %d, b: %d\n", a, b);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xb,-0x8(%rbp)
movl   $0x3,-0xc(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xec5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x8(%rbp),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <swap@plt>
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xe96(%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   $0xb,0xc(%rsp)
movl   $0x3,0x8(%rsp)
lea    0xec2(%rip),%rdi
call   1030 <puts@plt>
lea    0xea8(%rip),%rbx
mov    %rbx,%rdi
mov    $0xb,%esi
mov    $0x3,%edx
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xc(%rsp),%rdi
lea    0x8(%rsp),%rsi
call   1050 <swap@plt>
lea    0xea8(%rip),%rdi
call   1030 <puts@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %rbx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [29 x i8] c"===== before swapping =====\0A\00"
@.str.1 = [14 x i8] c"a: %d, b: %d\0A\00"
@.str.2 = [28 x i8] c"===== after swapping =====\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 11, i32* %2
store i32 3, i32* %3
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%5 = load i32, i32* %2
%6 = load i32, i32* %3
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 %5, i32 %6)
%8 = call i32 @swap(i32* %2, i32* %3)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 %10, i32 %11)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [14 x i8] c"a: %d, b: %d\0A\00"
@str = [28 x i8] c"===== before swapping =====\00"
@str.3 = [27 x i8] c"===== after swapping =====\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
store i32 11, i32* %1
%4 = bitcast i32* %2 to i8*
store i32 3, i32* %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 11, i32 3)
%7 = call i32 @swap(i32* %1, i32* %2)
%8 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 x i8]* @str.3, i64 0, i64 0))
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i32 %9, i32 %10)
ret i32 0
}