#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 atoi(char *);
int facto(int);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char **argv) {
  int n;
  if (argc != 2) {
    printf("Nombre de parametres insuffisants\n");
    return 1;
  } else if ((n = atoi(argv[1])) < 0) {
    printf("%d n'est pas un entier naturel\n", n);
    return 1;
  }
  printf("%llu", facto(n));
  return 0;
}


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)
cmpl   $0x2,-0x8(%rbp)
je     116a <main+0x3a>
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11c4 <main+0x94>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,-0x14(%rbp)
cmp    $0x0,%eax
jge    11a0 <main+0x70>
mov    -0x14(%rbp),%esi
lea    0xe96(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11c4 <main+0x94>
jmp    11a5 <main+0x75>
mov    -0x14(%rbp),%edi
call   1040 <facto@plt>
mov    %eax,%esi
lea    0xe8d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    116e <main+0x2e>
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
test   %eax,%eax
js     117c <main+0x3c>
mov    %eax,%edi
call   1050 <facto@plt>
lea    0xebf(%rip),%rdi
xor    %ebx,%ebx
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
jmp    1191 <main+0x51>
lea    0xeb0(%rip),%rdi
call   1030 <puts@plt>
jmp    118c <main+0x4c>
lea    0xe7d(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0x1,%ebx
mov    %ebx,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [35 x i8] c"Nombre de parametres insuffisants\0A\00"
@.str.1 = [32 x i8] c"%d n'est pas un entier naturel\0A\00"
@.str.2 = [5 x i8] c"%llu\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %25
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i32 @atoi(i8* %14)
store i32 %15, i32* %6
%16 = icmp slt i32 %15, 0
br i1 %16, label %17, label %20
17: ; preds = %11
%18 = load i32, i32* %6
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i32 %18)
store i32 1, i32* %3
br label %25
20: ; preds = %11
br label %21
21: ; preds = %20
%22 = load i32, i32* %6
%23 = call i32 @facto(i32 %22)
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i32 %23)
store i32 0, i32* %3
br label %25
25: ; preds = %21, %17, %9
%26 = load i32, i32* %3
ret i32 %26
}

LLVM IR (-O2):
@.str.1 = [32 x i8] c"%d n'est pas un entier naturel\0A\00"
@.str.2 = [5 x i8] c"%llu\00"
@str = [34 x i8] c"Nombre de parametres insuffisants\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %6, label %4
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @str, i64 0, i64 0))
br label %16
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = tail call i32 @atoi(i8* %8)
%10 = icmp slt i32 %9, 0
br i1 %10, label %11, label %13
11: ; preds = %6
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str.1, i64 0, i64 0), i32 %9)
br label %16
13: ; preds = %6
%14 = tail call i32 @facto(i32 %9)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i32 %14)
br label %16
16: ; preds = %13, %11, %4
%17 = phi i32 [ 1, %4 ], [ 1, %11 ], [ 0, %13 ]
ret i32 %17
}