#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 *);
int main(void) {
  int m, n, r;
  printf("Enter 2 integers (x, x): ");
  scanf("%d, %d", &m, &n);
  while (n != 0) {
    r = m % n;
    m = n;
    n = r;
  }
  printf("Greatest common divisor: %d\n", m);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1040 <scanf@plt>
cmpl   $0x0,-0xc(%rbp)
je     1176 <main+0x56>
mov    -0x8(%rbp),%eax
cltd
idivl  -0xc(%rbp)
mov    %edx,-0x10(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
jmp    1151 <main+0x31>
mov    -0x8(%rbp),%esi
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee4(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1040 <scanf@plt>
mov    (%rsp),%edx
mov    0x4(%rsp),%esi
test   %edx,%edx
je     1166 <main+0x46>
xchg   %ax,%ax
mov    %esi,%eax
mov    %edx,%esi
cltd
idiv   %esi
test   %edx,%edx
jne    1150 <main+0x30>
mov    %esi,0x4(%rsp)
movl   $0x0,(%rsp)
lea    0xeb4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [26 x i8] c"Enter 2 integers (x, x): \00"
@.str.1 = [7 x i8] c"%d, %d\00"
@.str.2 = [29 x i8] c"Greatest common divisor: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
br label %7
7: ; preds = %10, %0
%8 = load i32, i32* %3
%9 = icmp ne i32 %8, 0
br i1 %9, label %10, label %16
10: ; preds = %7
%11 = load i32, i32* %2
%12 = load i32, i32* %3
%13 = srem i32 %11, %12
store i32 %13, i32* %4
%14 = load i32, i32* %3
store i32 %14, i32* %2
%15 = load i32, i32* %4
store i32 %15, i32* %3
br label %7
16: ; preds = %7
%17 = load i32, i32* %2
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i32 %17)
ret i32 0
}

LLVM IR (-O2):
@.str = [26 x i8] c"Enter 2 integers (x, x): \00"
@.str.1 = [7 x i8] c"%d, %d\00"
@.str.2 = [29 x i8] c"Greatest common divisor: %d\0A\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 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%7 = load i32, i32* %2
%8 = load i32, i32* %1
%9 = icmp eq i32 %7, 0
br i1 %9, label %16, label %10
10: ; preds = %0, %10
%11 = phi i32 [ %13, %10 ], [ %7, %0 ]
%12 = phi i32 [ %11, %10 ], [ %8, %0 ]
%13 = srem i32 %12, %11
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %10
15: ; preds = %10
store i32 %11, i32* %1
store i32 0, i32* %2
br label %16
16: ; preds = %15, %0
%17 = phi i32 [ %11, %15 ], [ %8, %0 ]
%18 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i32 %17)
ret i32 0
}