#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 is_prime(int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n;
  int i;
  printf("please insert a number to check\n");
  scanf("%d", &n);
  if (n < 2) {
    return -1;
  } else
    printf("%d \n", is_prime(n, i));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xecd(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x2,-0x8(%rbp)
jge    1173 <main+0x43>
movl   $0xffffffff,-0x4(%rbp)
jmp    1195 <main+0x65>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1040 <is_prime@plt>
mov    %eax,%esi
lea    0xe9d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xebc(%rip),%rdi
call   1030 <puts@plt>
lea    0xea8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
mov    $0xffffffff,%ebx
cmp    $0x2,%edi
jl     1187 <main+0x47>
call   1050 <is_prime@plt>
lea    0xe87(%rip),%rdi
xor    %ebx,%ebx
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [33 x i8] c"please insert a number to check\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [5 x i8] c"%d \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = icmp slt i32 %6, 2
br i1 %7, label %8, label %9
8: ; preds = %0
store i32 -1, i32* %1
br label %15
9: ; preds = %0
%10 = load i32, i32* %2
%11 = load i32, i32* %3
%12 = call i32 @is_prime(i32 %10, i32 %11)
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i32 %12)
br label %14
14: ; preds = %9
store i32 0, i32* %1
br label %15
15: ; preds = %14, %8
%16 = load i32, i32* %1
ret i32 %16
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [5 x i8] c"%d \0A\00"
@str = [32 x i8] c"please insert a number to check\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp slt i32 %5, 2
br i1 %6, label %10, label %7
7: ; preds = %0
%8 = call i32 @is_prime(i32 %5, i32 undef)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i32 %8)
br label %10
10: ; preds = %0, %7
%11 = phi i32 [ 0, %7 ], [ -1, %0 ]
ret i32 %11
}