#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 */
scalar_t__ is_prime(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
void main() {
  int number = 7;
  printf("Give a number:");
  scanf("%d", &number);
  if (is_prime(number)) {
    printf("The %d is a prime!\n", number);
  } else {
    printf("The %d is not a prime!\n", number);
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x7,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebb(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x4(%rbp),%edi
call   1040 <is_prime@plt>
cmp    $0x0,%rax
je     1185 <main+0x55>
mov    -0x4(%rbp),%esi
lea    0xe99(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1196 <main+0x66>
mov    -0x4(%rbp),%esi
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
movl   $0x7,0x4(%rsp)
lea    0xec0(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%edi
call   1040 <is_prime@plt>
test   %rax,%rax
mov    0x4(%rsp),%esi
lea    0xeb7(%rip),%rax
lea    0xe9c(%rip),%rdi
cmove  %rax,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
pop    %rax
ret

LLVM IR (-O0):
@.str = [15 x i8] c"Give a number:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"The %d is a prime!\0A\00"
@.str.3 = [24 x i8] c"The %d is not a prime!\0A\00"
define void @main() {
%1 = alloca i32
store i32 7, i32* %1
%2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%4 = load i32, i32* %1
%5 = call i64 @is_prime(i32 %4)
%6 = icmp ne i64 %5, 0
br i1 %6, label %7, label %10
7: ; preds = %0
%8 = load i32, i32* %1
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %8)
br label %13
10: ; preds = %0
%11 = load i32, i32* %1
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0), i32 %11)
br label %13
13: ; preds = %10, %7
ret void
}

LLVM IR (-O2):
@.str = [15 x i8] c"Give a number:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"The %d is a prime!\0A\00"
@.str.3 = [24 x i8] c"The %d is not a prime!\0A\00"
define void @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 7, i32* %1
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 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 = call i64 @is_prime(i32 %5)
%7 = icmp eq i64 %6, 0
%8 = load i32, i32* %1
%9 = select i1 %7, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0)
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %9, i32 %8)
ret void
}