#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*/ getchar();
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
int menu() {
  int op;
  printf("\n");
  printf("[1] Agregar cliente\n");
  printf("[2] Listar clientes\n");
  printf("[3] Buscar cliente\n");
  printf("[4] Salir\n");
  do {
    printf("Ingresa una opcion: ");
    scanf("%d", &op);
    printf("\n");
    getchar();
  } while (op < 1 || op > 4);
  return op;
}


x86 assembly (clang, -O0):
<menu>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xefd(%rip),%rdi
call   1030 <printf@plt>
lea    0xeb5(%rip),%rdi
call   1030 <printf@plt>
lea    0xebe(%rip),%rdi
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
call   1030 <printf@plt>
lea    0xece(%rip),%rdi
call   1030 <printf@plt>
lea    0xed7(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xea5(%rip),%rdi
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
mov    $0x1,%al
cmpl   $0x1,-0x4(%rbp)
mov    %al,-0x5(%rbp)
jl     11bc <menu+0x8c>
cmpl   $0x4,-0x4(%rbp)
setg   %al
mov    %al,-0x5(%rbp)
mov    -0x5(%rbp),%al
test   $0x1,%al
jne    1174 <menu+0x44>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<menu>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xeae(%rip),%rdi
call   1040 <puts@plt>
lea    0xeb6(%rip),%rdi
call   1040 <puts@plt>
lea    0xebe(%rip),%rdi
call   1040 <puts@plt>
lea    0xec5(%rip),%rdi
call   1040 <puts@plt>
lea    0xe66(%rip),%r14
lea    0xe74(%rip),%r15
lea    0xc(%rsp),%rbx
cs nopw 0x0(%rax,%rax,1)
mov    %r14,%rdi
call   1050 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1070 <scanf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
call   1060 <getchar@plt>
mov    0xc(%rsp),%eax
lea    -0x5(%rax),%ecx
cmp    $0xfffffffc,%ecx
jb     11b0 <menu+0x60>
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"\0A\00"
@.str.1 = [21 x i8] c"[1] Agregar cliente\0A\00"
@.str.2 = [21 x i8] c"[2] Listar clientes\0A\00"
@.str.3 = [20 x i8] c"[3] Buscar cliente\0A\00"
@.str.4 = [11 x i8] c"[4] Salir\0A\00"
@.str.5 = [21 x i8] c"Ingresa una opcion: \00"
@.str.6 = [3 x i8] c"%d\00"
define i32 @menu() {
%1 = alloca i32
%2 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
br label %7
7: ; preds = %18, %0
%8 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.5, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.6, i64 0, i64 0), i32* %1)
%10 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%11 = call i32 (...) @getchar()
br label %12
12: ; preds = %7
%13 = load i32, i32* %1
%14 = icmp slt i32 %13, 1
br i1 %14, label %18, label %15
15: ; preds = %12
%16 = load i32, i32* %1
%17 = icmp sgt i32 %16, 4
br label %18
18: ; preds = %15, %12
%19 = phi i1 [ true, %12 ], [ %17, %15 ]
br i1 %19, label %7, label %20
20: ; preds = %18
%21 = load i32, i32* %1
ret i32 %21
}

LLVM IR (-O2):
@.str.5 = [21 x i8] c"Ingresa una opcion: \00"
@.str.6 = [3 x i8] c"%d\00"
@str = [20 x i8] c"[1] Agregar cliente\00"
@str.7 = [20 x i8] c"[2] Listar clientes\00"
@str.8 = [19 x i8] c"[3] Buscar cliente\00"
@str.9 = [10 x i8] c"[4] Salir\00"
define i32 @menu() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @putchar(i32 10)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str.7, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str.8, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.9, i64 0, i64 0))
br label %8
8: ; preds = %8, %0
%9 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.5, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.6, i64 0, i64 0), i32* %1)
%11 = call i32 @putchar(i32 10)
%12 = call i32 (...) @getchar()
%13 = load i32, i32* %1
%14 = add i32 %13, -5
%15 = icmp ult i32 %14, -4
br i1 %15, label %8, label %16
16: ; preds = %8
ret i32 %13
}