#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*/ scanf(char *, int *);
int /*<<< orphan*/ swap(int *, int *);
int main(int argc, const char *argv[]) {
  int a, b;
  printf("Enter a number\n");
  scanf("%i", &a);
  printf("Enter a number\n");
  scanf("%i", &b);
  printf("=====================================================\n");
  printf("Before swapping the numbers [a] is %i, [b] is %i\n", a, b);
  printf("=====================================================\n");
  swap(&a, &b);
  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    0xeb5(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xe95(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe97(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%esi
mov    -0x18(%rbp),%edx
lea    0xead(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe68(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x14(%rbp),%rdi
lea    -0x18(%rbp),%rsi
call   1050 <swap@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xee6(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xea2(%rip),%r15
lea    0x4(%rsp),%r14
mov    %r15,%rdi
mov    %r14,%rsi
call   1050 <scanf@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    %rsp,%r12
mov    %r15,%rdi
mov    %r12,%rsi
call   1050 <scanf@plt>
lea    0xeb9(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%edx
lea    0xe62(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
mov    %r14,%rdi
mov    %r12,%rsi
call   1060 <swap@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [16 x i8] c"Enter a number\0A\00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [55 x i8] c"=====================================================\0A\00"
@.str.3 = [50 x i8] c"Before swapping the numbers [a] is %i, [b] is %i\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 ([16 x i8], [16 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %6)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %7)
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([55 x i8], [55 x i8]* @.str.2, i64 0, i64 0))
%13 = load i32, i32* %6
%14 = load i32, i32* %7
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str.3, i64 0, i64 0), i32 %13, i32 %14)
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([55 x i8], [55 x i8]* @.str.2, i64 0, i64 0))
%17 = call i32 @swap(i32* %6, i32* %7)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%i\00"
@.str.3 = [50 x i8] c"Before swapping the numbers [a] is %i, [b] is %i\0A\00"
@str.4 = [15 x i8] c"Enter a number\00"
@str.6 = [54 x i8] c"=====================================================\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 @puts(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 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* %3)
%9 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @str.4, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%11 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([54 x i8], [54 x i8]* @str.6, i64 0, i64 0))
%12 = load i32, i32* %3
%13 = load i32, i32* %4
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([50 x i8], [50 x i8]* @.str.3, i64 0, i64 0), i32 %12, i32 %13)
%15 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([54 x i8], [54 x i8]* @str.6, i64 0, i64 0))
%16 = call i32 @swap(i32* %3, i32* %4)
ret i32 0
}