#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*/ real_swap(int *, int *);
int /*<<< orphan*/ scanf(char *, int *, int *);
int main(int argc, char *argv[]) {
  int x, y;
  printf("Enter two numbers: ");
  scanf("%d%d", &x, &y);
  printf("The two numbers are %d (%p) %d (%p)\n", x, &x, y, &y);
  real_swap(&x, &y);
  printf("Now they are %d %d\n", x, y);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb9(%rip),%rdi
lea    -0x14(%rbp),%rsi
lea    -0x18(%rbp),%rdx
call   1050 <scanf@plt>
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%ecx
lea    0xea4(%rip),%rdi
lea    -0x14(%rbp),%rdx
lea    -0x18(%rbp),%r8
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x14(%rbp),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <real_swap@plt>
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
lea    0xea0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0x4(%rsp),%rbx
mov    %rsp,%r14
mov    %rbx,%rsi
mov    %r14,%rdx
call   1050 <scanf@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%ecx
lea    0xeaf(%rip),%rdi
mov    %rbx,%rdx
mov    %r14,%r8
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <real_swap@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%edx
lea    0xeae(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [20 x i8] c"Enter two numbers: \00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.2 = [37 x i8] c"The two numbers are %d (%p) %d (%p)\0A\00"
@.str.3 = [20 x i8] c"Now they are %d %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %6, i32* %7)
%10 = load i32, i32* %6
%11 = load i32, i32* %7
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i32 %10, i32* %6, i32 %11, i32* %7)
%13 = call i32 @real_swap(i32* %6, i32* %7)
%14 = load i32, i32* %6
%15 = load i32, i32* %7
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0), i32 %14, i32 %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [20 x i8] c"Enter two numbers: \00"
@.str.1 = [5 x i8] c"%d%d\00"
@.str.2 = [37 x i8] c"The two numbers are %d (%p) %d (%p)\0A\00"
@.str.3 = [20 x i8] c"Now they are %d %d\0A\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %3 to i8*
%6 = bitcast i32* %4 to i8*
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32* %3, i32* %4)
%9 = load i32, i32* %3
%10 = load i32, i32* %4
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32* %3, i32 %10, i32* %4)
%12 = call i32 @real_swap(i32* %3, i32* %4)
%13 = load i32, i32* %3
%14 = load i32, i32* %4
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0), i32 %13, i32 %14)
ret i32 0
}