#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 /*<<< orphan*/ scanf(char *, int *);
main() {
  int num, i, count = 0;
  printf("Digite um numero: ");
  scanf("%d", &num);
  for (i = 2; i <= num / 2; i++) {
    if (num % i == 0) {
      count++;
      break;
    }
  }
  if (count == 0 && num != 1)
    printf("%d eh um numero primo", num);
  else
    printf("%d nao eh um numero primo", num);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec8(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x2,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x8(%rbp),%eax
mov    $0x2,%ecx
cltd
idiv   %ecx
mov    %eax,%ecx
mov    -0x14(%rbp),%eax
cmp    %ecx,%eax
jg     11aa <main+0x8a>
mov    -0x8(%rbp),%eax
cltd
idivl  -0xc(%rbp)
cmp    $0x0,%edx
jne    1197 <main+0x77>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    11aa <main+0x8a>
jmp    119c <main+0x7c>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    115b <main+0x3b>
cmpl   $0x0,-0x10(%rbp)
jne    11d4 <main+0xb4>
cmpl   $0x1,-0x8(%rbp)
je     11d4 <main+0xb4>
mov    -0x8(%rbp),%esi
lea    0xe4e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11e5 <main+0xc5>
mov    -0x8(%rbp),%esi
lea    0xe4e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedd(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%esi
cmp    $0x4,%esi
jl     117b <main+0x5b>
mov    %esi,%ecx
shr    %ecx
neg    %ecx
mov    $0x2,%edi
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    %esi,%eax
cltd
idiv   %edi
test   %edx,%edx
je     1180 <main+0x60>
lea    (%rcx,%rdi,1),%eax
add    $0x1,%eax
mov    %edi,%edx
add    $0x1,%edx
mov    %edx,%edi
cmp    $0x1,%eax
jne    1160 <main+0x40>
cmp    $0x1,%esi
jne    1189 <main+0x69>
lea    0xea5(%rip),%rdi
jmp    1190 <main+0x70>
lea    0xe86(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"Digite um numero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [22 x i8] c"%d eh um numero primo\00"
@.str.3 = [26 x i8] c"%d nao eh um numero primo\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
store i32 2, i32* %3
br label %7
7: ; preds = %21, %0
%8 = load i32, i32* %3
%9 = load i32, i32* %2
%10 = sdiv i32 %9, 2
%11 = icmp sle i32 %8, %10
br i1 %11, label %12, label %24
12: ; preds = %7
%13 = load i32, i32* %2
%14 = load i32, i32* %3
%15 = srem i32 %13, %14
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %20
17: ; preds = %12
%18 = load i32, i32* %4
%19 = add nsw i32 %18, 1
store i32 %19, i32* %4
br label %24
20: ; preds = %12
br label %21
21: ; preds = %20
%22 = load i32, i32* %3
%23 = add nsw i32 %22, 1
store i32 %23, i32* %3
br label %7
24: ; preds = %17, %7
%25 = load i32, i32* %4
%26 = icmp eq i32 %25, 0
br i1 %26, label %27, label %33
27: ; preds = %24
%28 = load i32, i32* %2
%29 = icmp ne i32 %28, 1
br i1 %29, label %30, label %33
30: ; preds = %27
%31 = load i32, i32* %2
%32 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0), i32 %31)
br label %36
33: ; preds = %27, %24
%34 = load i32, i32* %2
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i32 %34)
br label %36
36: ; preds = %33, %30
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"Digite um numero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [22 x i8] c"%d eh um numero primo\00"
@.str.3 = [26 x i8] c"%d nao eh um numero primo\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 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, 4
br i1 %6, label %16, label %7
7: ; preds = %0
%8 = lshr i32 %5, 1
br label %12
9: ; preds = %12
%10 = add nuw nsw i32 %13, 1
%11 = icmp eq i32 %13, %8
br i1 %11, label %16, label %12
12: ; preds = %7, %9
%13 = phi i32 [ %10, %9 ], [ 2, %7 ]
%14 = srem i32 %5, %13
%15 = icmp eq i32 %14, 0
br i1 %15, label %18, label %9
16: ; preds = %9, %0
%17 = icmp eq i32 %5, 1
br i1 %17, label %18, label %19
18: ; preds = %12, %16
br label %19
19: ; preds = %16, %18
%20 = phi i8* [ getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), %18 ], [ getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0), %16 ]
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %20, i32 %5)
ret i32 0
}