#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, int);
void swap(int n1, int n2) {
  printf("%d:%d\n", n1, n2);
  n1 = n1 ^ n2;
  printf("%d:%d\n", n1, n2);
  n2 = n1 ^ n2;
  printf("%d:%d\n", n1, n2);
  n1 = n1 ^ n2;
  printf("%d:%d\n", n1, n2);
}


x86 assembly (clang, -O0):
<swap>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    %esi,-0x8(%rbp)
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xed5(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
xor    -0x8(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xeba(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
xor    -0x8(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
xor    -0x8(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xe84(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<swap>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%r15d
mov    %edi,%ebp
lea    0xedd(%rip),%r14
mov    %r14,%rdi
mov    %ebp,%esi
mov    %r15d,%edx
call   1030 <printf@plt>
mov    %r15d,%ebx
xor    %ebp,%ebx
mov    %r14,%rdi
mov    %ebx,%esi
mov    %r15d,%edx
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %ebx,%esi
mov    %ebp,%edx
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %r15d,%esi
mov    %ebp,%edx
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <printf@plt>

LLVM IR (-O0):
@.str = [7 x i8] c"%d:%d\0A\00"
define void @swap(i32 %0, i32 %1) {
%3 = alloca i32
%4 = alloca i32
store i32 %0, i32* %3
store i32 %1, i32* %4
%5 = load i32, i32* %3
%6 = load i32, i32* %4
%7 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %5, i32 %6)
%8 = load i32, i32* %3
%9 = load i32, i32* %4
%10 = xor i32 %8, %9
store i32 %10, i32* %3
%11 = load i32, i32* %3
%12 = load i32, i32* %4
%13 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %11, i32 %12)
%14 = load i32, i32* %3
%15 = load i32, i32* %4
%16 = xor i32 %14, %15
store i32 %16, i32* %4
%17 = load i32, i32* %3
%18 = load i32, i32* %4
%19 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %17, i32 %18)
%20 = load i32, i32* %3
%21 = load i32, i32* %4
%22 = xor i32 %20, %21
store i32 %22, i32* %3
%23 = load i32, i32* %3
%24 = load i32, i32* %4
%25 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %23, i32 %24)
ret void
}

LLVM IR (-O2):
@.str = [7 x i8] c"%d:%d\0A\00"
define void @swap(i32 %0, i32 %1) {
%3 = tail call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %0, i32 %1)
%4 = xor i32 %1, %0
%5 = tail call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %4, i32 %1)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %4, i32 %0)
%7 = tail call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32 %1, i32 %0)
ret void
}