#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*/ exchange(int *, int *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
main() {
  int a, b;
  printf("Enter the value of a:\n");
  scanf("%d", &a);
  printf("Enter the value of b:\n");
  scanf("%d", &b);
  exchange(&a, &b);
  printf("The values of a is %d and b is %d.\n", a, b);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xec1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeca(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xebd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeac(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    -0x4(%rbp),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <exchange@plt>
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xea3(%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
lea    0xed7(%rip),%rdi
call   1030 <puts@plt>
lea    0xea4(%rip),%r15
lea    0xc(%rsp),%r14
mov    %r15,%rdi
mov    %r14,%rsi
call   1050 <scanf@plt>
lea    0xeca(%rip),%rdi
call   1030 <puts@plt>
lea    0x8(%rsp),%rbx
mov    %r15,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1060 <exchange@plt>
mov    0xc(%rsp),%esi
mov    0x8(%rsp),%edx
lea    0xe61(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [23 x i8] c"Enter the value of a:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [23 x i8] c"Enter the value of b:\0A\00"
@.str.3 = [36 x i8] c"The values of a is %d and b is %d.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%7 = call i32 @exchange(i32* %1, i32* %2)
%8 = load i32, i32* %1
%9 = load i32, i32* %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.3, i64 0, i64 0), i32 %8, i32 %9)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [36 x i8] c"The values of a is %d and b is %d.\0A\00"
@str = [22 x i8] c"Enter the value of a:\00"
@str.4 = [22 x i8] c"Enter the value of b:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.4, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = call i32 @exchange(i32* %1, i32* %2)
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([36 x i8], [36 x i8]* @.str.3, i64 0, i64 0), i32 %10, i32 %11)
ret i32 0
}