#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 = 10;
  int y = 20;
  printf("&x=%p\n", &x);
  printf("&y=%p\n", &y);
  printf("x=%d, y=%d\n", x, y);
  swap(&x, &y);
  printf("x=%d, y=%d\n", x, y);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0xa,-0x4(%rbp)
movl   $0x14,-0x8(%rbp)
lea    0xec3(%rip),%rdi
lea    -0x4(%rbp),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb8(%rip),%rdi
lea    -0x8(%rbp),%rsi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xea7(%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
mov    -0x8(%rbp),%edx
lea    0xe86(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
movl   $0xa,0xc(%rsp)
movl   $0x14,0x8(%rsp)
lea    0xec0(%rip),%rdi
lea    0xc(%rsp),%r14
mov    %r14,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeb1(%rip),%rdi
lea    0x8(%rsp),%r15
mov    %r15,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
lea    0xe9a(%rip),%rbx
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %r15,%rsi
call   1040 <swap@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [7 x i8] c"&x=%p\0A\00"
@.str.1 = [7 x i8] c"&y=%p\0A\00"
@.str.2 = [12 x i8] c"x=%d, y=%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 10, i32* %1
store i32 20, i32* %2
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32* %1)
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%5 = load i32, i32* %1
%6 = load i32, i32* %2
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %5, i32 %6)
%8 = call i32 @swap(i32* %1, i32* %2)
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %9, i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [7 x i8] c"&x=%p\0A\00"
@.str.1 = [7 x i8] c"&y=%p\0A\00"
@.str.2 = [12 x i8] c"x=%d, y=%d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
store i32 10, i32* %1
%4 = bitcast i32* %2 to i8*
store i32 20, i32* %2
%5 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i32* %1)
%6 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %1
%8 = load i32, i32* %2
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %7, i32 %8)
%10 = call i32 @swap(i32* %1, i32* %2)
%11 = load i32, i32* %1
%12 = load i32, i32* %2
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %11, i32 %12)
ret i32 0
}