#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*/ LC_ALL;
int fatorial(int);
int /*<<< orphan*/ getch();
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int /*<<< orphan*/ setlocale(int /*<<< orphan*/, char *);
main() {
  setlocale(LC_ALL, "Portuguese");
  int fat;
  printf("Digite um número: ");
  scanf("%d", &fat);
  if (fat > 0) {
    fatorial(fat);
    printf("o fatorial de %d é %d", fat, fatorial(fat));
  }
  getch();
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e7a(%rip),%rax
mov    (%rax),%edi
lea    0xe91(%rip),%rsi
call   1050 <setlocale@plt>
lea    0xe90(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeaa(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
cmpl   $0x0,-0x8(%rbp)
jle    11c5 <main+0x75>
mov    -0x8(%rbp),%edi
call   1040 <fatorial@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1040 <fatorial@plt>
mov    -0xc(%rbp),%esi
mov    %eax,%edx
lea    0xe61(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1070 <getch@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
mov    0x2e84(%rip),%rax
mov    (%rax),%edi
lea    0xe9b(%rip),%rsi
call   1050 <setlocale@plt>
lea    0xe9a(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeb4(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
test   %edi,%edi
jle    11b3 <main+0x63>
call   1040 <fatorial@plt>
mov    0xc(%rsp),%ebx
mov    %ebx,%edi
call   1040 <fatorial@plt>
lea    0xe77(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1070 <getch@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@LC_ALL = global i32 0
@.str = [11 x i8] c"Portuguese\00"
@.str.1 = [20 x i8] c"Digite um n\C3\BAmero: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [23 x i8] c"o fatorial de %d \C3\A9 %d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = load i32, i32* @LC_ALL
%4 = call i32 @setlocale(i32 %3, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0))
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%7 = load i32, i32* %2
%8 = icmp sgt i32 %7, 0
br i1 %8, label %9, label %16
9: ; preds = %0
%10 = load i32, i32* %2
%11 = call i32 @fatorial(i32 %10)
%12 = load i32, i32* %2
%13 = load i32, i32* %2
%14 = call i32 @fatorial(i32 %13)
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), i32 %12, i32 %14)
br label %16
16: ; preds = %9, %0
%17 = call i32 (...) @getch()
%18 = load i32, i32* %1
ret i32 %18
}

LLVM IR (-O2):
@LC_ALL = global i32 0
@.str = [11 x i8] c"Portuguese\00"
@.str.1 = [20 x i8] c"Digite um n\C3\BAmero: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [23 x i8] c"o fatorial de %d \C3\A9 %d\00"
define i32 @main() {
%1 = alloca i32
%2 = load i32, i32* @LC_ALL
%3 = tail call i32 @setlocale(i32 %2, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0))
%4 = bitcast i32* %1 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%7 = load i32, i32* %1
%8 = icmp sgt i32 %7, 0
br i1 %8, label %9, label %14
9: ; preds = %0
%10 = call i32 @fatorial(i32 %7)
%11 = load i32, i32* %1
%12 = call i32 @fatorial(i32 %11)
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), i32 %11, i32 %12)
br label %14
14: ; preds = %9, %0
%15 = call i32 (...) @getch()
ret i32 0
}