#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 x = 1;
  int y = 2;
  printf("x is %d\n", x);
  printf("y is %d\n", y);
  printf("Swapping...\n");
  swap(x, y);
  printf("Swapped!\n");
  printf("x is %d\n", x);
  printf("y is %d\n", y);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x1,-0x4(%rbp)
movl   $0x2,-0x8(%rbp)
mov    -0x4(%rbp),%esi
lea    0xec0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%edi
mov    -0x8(%rbp),%esi
call   1040 <swap@plt>
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%esi
lea    0xe77(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%esi
lea    0xe6f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xec5(%rip),%r14
mov    %r14,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeb8(%rip),%rbx
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeab(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
mov    $0x2,%esi
call   1050 <swap@plt>
lea    0xe9c(%rip),%rdi
call   1030 <puts@plt>
mov    %r14,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [9 x i8] c"x is %d\0A\00"
@.str.1 = [9 x i8] c"y is %d\0A\00"
@.str.2 = [13 x i8] c"Swapping...\0A\00"
@.str.3 = [10 x i8] c"Swapped!\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 1, i32* %1
store i32 2, i32* %2
%3 = load i32, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = load i32, i32* %2
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %5)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* %1
%9 = load i32, i32* %2
%10 = call i32 @swap(i32 %8, i32 %9)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%12 = load i32, i32* %1
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %12)
%14 = load i32, i32* %2
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"x is %d\0A\00"
@.str.1 = [9 x i8] c"y is %d\0A\00"
@str = [12 x i8] c"Swapping...\00"
@str.4 = [9 x i8] c"Swapped!\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 1)
%2 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 2)
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @swap(i32 1, i32 2)
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str.4, i64 0, i64 0))
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 1)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 2)
ret i32 0
}