#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 *);
int main() {
  int num = 1, primo;
  do {
    printf("Informe um numero primo maior que 1:");
    scanf("%d", &primo);
  } while (primo <= 1);
  if (primo % num == 0) {
    printf("Numero primo %d", primo);
  } else {
    printf("Numero não primo");
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee7(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x1,-0xc(%rbp)
jle    1136 <main+0x16>
mov    -0xc(%rbp),%eax
cltd
idivl  -0x8(%rbp)
cmp    $0x0,%edx
jne    1184 <main+0x64>
mov    -0xc(%rbp),%esi
lea    0xead(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1192 <main+0x72>
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xed0(%rip),%r14
lea    0xefb(%rip),%r15
lea    0xc(%rsp),%rbx
nopl   0x0(%rax)
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
cmp    $0x2,%esi
jl     1140 <main+0x20>
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [37 x i8] c"Informe um numero primo maior que 1:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"Numero primo %d\00"
@.str.3 = [18 x i8] c"Numero n\C3\A3o primo\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %2
br label %4
4: ; preds = %7, %0
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([37 x i8], [37 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* %3)
br label %7
7: ; preds = %4
%8 = load i32, i32* %3
%9 = icmp sle i32 %8, 1
br i1 %9, label %4, label %10
10: ; preds = %7
%11 = load i32, i32* %3
%12 = load i32, i32* %2
%13 = srem i32 %11, %12
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %18
15: ; preds = %10
%16 = load i32, i32* %3
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i32 %16)
br label %20
18: ; preds = %10
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.3, i64 0, i64 0))
br label %20
20: ; preds = %18, %15
%21 = load i32, i32* %1
ret i32 %21
}

LLVM IR (-O2):
@.str = [37 x i8] c"Informe um numero primo maior que 1:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"Numero primo %d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %3, %0
%4 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 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* %1)
%6 = load i32, i32* %1
%7 = icmp slt i32 %6, 2
br i1 %7, label %3, label %8
8: ; preds = %3
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i32 %6)
ret i32 0
}