#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 *);
void main() {
  int a, b;
  printf("Enter a: ");
  scanf("%d", &a);
  scanf("%d", &b);
  if (a != b) {
    a = a + b;
    b = a - b;
    a = a - b;
  }
  printf("A: %d\nB: %d", a, b);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xec6(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x4(%rbp),%eax
cmp    -0x8(%rbp),%eax
je     117d <main+0x5d>
mov    -0x4(%rbp),%eax
add    -0x8(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
sub    -0x8(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x4(%rbp),%eax
sub    -0x8(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%esi
mov    -0x8(%rbp),%edx
lea    0xe80(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed9(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
mov    0xc(%rsp),%edx
mov    0x8(%rsp),%eax
mov    %edx,%esi
cmp    %eax,%edx
je     116c <main+0x4c>
mov    %edx,0x8(%rsp)
mov    %eax,0xc(%rsp)
mov    %eax,%esi
lea    0xe97(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [10 x i8] c"Enter a: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [12 x i8] c"A: %d\0AB: %d\00"
define void @main() {
%1 = alloca i32
%2 = alloca i32
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 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 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %1
%7 = load i32, i32* %2
%8 = icmp ne i32 %6, %7
br i1 %8, label %9, label %19
9: ; preds = %0
%10 = load i32, i32* %1
%11 = load i32, i32* %2
%12 = add nsw i32 %10, %11
store i32 %12, i32* %1
%13 = load i32, i32* %1
%14 = load i32, i32* %2
%15 = sub nsw i32 %13, %14
store i32 %15, i32* %2
%16 = load i32, i32* %1
%17 = load i32, i32* %2
%18 = sub nsw i32 %16, %17
store i32 %18, i32* %1
br label %19
19: ; preds = %9, %0
%20 = load i32, i32* %1
%21 = load i32, i32* %2
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %20, i32 %21)
ret void
}

LLVM IR (-O2):
@.str = [10 x i8] c"Enter a: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [12 x i8] c"A: %d\0AB: %d\00"
define void @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 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 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = load i32, i32* %1
%9 = load i32, i32* %2
%10 = icmp eq i32 %8, %9
br i1 %10, label %12, label %11
11: ; preds = %0
store i32 %8, i32* %2
store i32 %9, i32* %1
br label %12
12: ; preds = %11, %0
%13 = phi i32 [ %9, %11 ], [ %8, %0 ]
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i32 %13, i32 %8)
ret void
}