#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 scanf(char *, int *);
int menu() {
  int op;
  printf("*-------------------*\n");
  printf("|1: Suma            |\n");
  printf("|2: Resta           |\n");
  printf("|3: Multiplicacion  |\n");
  printf("|4: Division        |\n");
  printf("|5: Salir           |\n");
  printf("*-------------------*\n");
  printf("Selecciona una opcion: ");
  if (scanf("%d", &op) != 1) {
    op = 0;
  }
  return op;
}


x86 assembly (clang, -O0):
<menu>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
lea    0xedc(%rip),%rdi
call   1030 <printf@plt>
lea    0xee7(%rip),%rdi
call   1030 <printf@plt>
lea    0xef2(%rip),%rdi
call   1030 <printf@plt>
lea    0xefd(%rip),%rdi
call   1030 <printf@plt>
lea    0xf08(%rip),%rdi
call   1030 <printf@plt>
lea    0xe89(%rip),%rdi
call   1030 <printf@plt>
lea    0xf07(%rip),%rdi
call   1030 <printf@plt>
lea    0xf13(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
cmp    $0x1,%eax
je     11a8 <menu+0x88>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<menu>:
push   %rbx
sub    $0x10,%rsp
lea    0xf4d(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xed0(%rip),%rdi
call   1030 <puts@plt>
lea    0xeda(%rip),%rdi
call   1030 <puts@plt>
lea    0xee4(%rip),%rdi
call   1030 <puts@plt>
lea    0xeee(%rip),%rdi
call   1030 <puts@plt>
lea    0xef8(%rip),%rdi
call   1030 <puts@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xe71(%rip),%rdi
call   1040 <printf@plt>
lea    0xe7d(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    %eax,%ecx
xor    %eax,%eax
cmp    $0x1,%ecx
jne    11b2 <menu+0x82>
mov    0xc(%rsp),%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [23 x i8] c"*-------------------*\0A\00"
@.str.1 = [23 x i8] c"|1: Suma |\0A\00"
@.str.2 = [23 x i8] c"|2: Resta |\0A\00"
@.str.3 = [23 x i8] c"|3: Multiplicacion |\0A\00"
@.str.4 = [23 x i8] c"|4: Division |\0A\00"
@.str.5 = [23 x i8] c"|5: Salir |\0A\00"
@.str.6 = [24 x i8] c"Selecciona una opcion: \00"
@.str.7 = [3 x i8] c"%d\00"
define i32 @menu() {
%1 = alloca i32
%2 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.5, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.6, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), i32* %1)
%11 = icmp ne i32 %10, 1
br i1 %11, label %12, label %13
12: ; preds = %0
store i32 0, i32* %1
br label %13
13: ; preds = %12, %0
%14 = load i32, i32* %1
ret i32 %14
}

LLVM IR (-O2):
@.str.6 = [24 x i8] c"Selecciona una opcion: \00"
@.str.7 = [3 x i8] c"%d\00"
@str.8 = [22 x i8] c"|1: Suma |\00"
@str.9 = [22 x i8] c"|2: Resta |\00"
@str.10 = [22 x i8] c"|3: Multiplicacion |\00"
@str.11 = [22 x i8] c"|4: Division |\00"
@str.12 = [22 x i8] c"|5: Salir |\00"
@str.13 = [22 x i8] c"*-------------------*\00"
define i32 @menu() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.13, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.8, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.9, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.10, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.11, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.12, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.13, i64 0, i64 0))
%10 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.6, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), i32* %1)
%12 = icmp eq i32 %11, 1
%13 = load i32, i32* %1
%14 = select i1 %12, i32 %13, i32 0
ret i32 %14
}