#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 EXIT_SUCCESS;
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *, int *);
int main(int argc, char **argv) {
  int a, b, residuo = 0;
  printf("Introduce dos numeros enteros: ");
  scanf("%d %d", &a, &b);
  while (b != 0) {
    residuo = a % b;
    a = b;
    b = residuo;
  }
  printf("El M.C.D = %d", a);
  return (EXIT_SUCCESS);
}


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)
movl   $0x0,-0x1c(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xece(%rip),%rdi
lea    -0x14(%rbp),%rsi
lea    -0x18(%rbp),%rdx
call   1040 <scanf@plt>
cmpl   $0x0,-0x18(%rbp)
je     1184 <main+0x64>
mov    -0x14(%rbp),%eax
cltd
idivl  -0x18(%rbp)
mov    %edx,-0x1c(%rbp)
mov    -0x18(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x1c(%rbp),%eax
mov    %eax,-0x18(%rbp)
jmp    115f <main+0x3f>
mov    -0x14(%rbp),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    0x2e44(%rip),%rax
mov    (%rax),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeea(%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    0xeb9(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    0x2e65(%rip),%rax
mov    (%rax),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [32 x i8] c"Introduce dos numeros enteros: \00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [14 x i8] c"El M.C.D = %d\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 0, i32* %8
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %6, i32* %7)
br label %11
11: ; preds = %14, %2
%12 = load i32, i32* %7
%13 = icmp ne i32 %12, 0
br i1 %13, label %14, label %20
14: ; preds = %11
%15 = load i32, i32* %6
%16 = load i32, i32* %7
%17 = srem i32 %15, %16
store i32 %17, i32* %8
%18 = load i32, i32* %7
store i32 %18, i32* %6
%19 = load i32, i32* %8
store i32 %19, i32* %7
br label %11
20: ; preds = %11
%21 = load i32, i32* %6
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %21)
%23 = load i32, i32* @EXIT_SUCCESS
ret i32 %23
}

LLVM IR (-O2):
@.str = [32 x i8] c"Introduce dos numeros enteros: \00"
@.str.1 = [6 x i8] c"%d %d\00"
@.str.2 = [14 x i8] c"El M.C.D = %d\00"
@EXIT_SUCCESS = global i32 0
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 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %3, i32* %4)
%9 = load i32, i32* %4
%10 = load i32, i32* %3
%11 = icmp eq i32 %9, 0
br i1 %11, label %18, label %12
12: ; preds = %2, %12
%13 = phi i32 [ %15, %12 ], [ %9, %2 ]
%14 = phi i32 [ %13, %12 ], [ %10, %2 ]
%15 = srem i32 %14, %13
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %12
17: ; preds = %12
store i32 %13, i32* %3
store i32 0, i32* %4
br label %18
18: ; preds = %17, %2
%19 = phi i32 [ %13, %17 ], [ %10, %2 ]
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i32 %19)
%21 = load i32, i32* @EXIT_SUCCESS
ret i32 %21
}