#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 sieve_of_eratosthenes(int);
int main(void) {
  int n, test;
  printf("Enter a positive integer: ");
  scanf("%i", &n);
  test = sieve_of_eratosthenes(n);
  if (test == 1) {
    printf("Your number was not prime.\n");
  } else if (test == 0) {
    printf("Your number was prime.\n");
  } else {
    printf("Error: Something unexpected happened\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%edi
call   1040 <sieve_of_eratosthenes@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x1,-0xc(%rbp)
jne    1181 <main+0x51>
lea    0xea7(%rip),%rdi
call   1030 <printf@plt>
jmp    11ad <main+0x7d>
cmpl   $0x0,-0xc(%rbp)
jne    119c <main+0x6c>
lea    0xea8(%rip),%rdi
call   1030 <printf@plt>
jmp    11a8 <main+0x78>
lea    0xeaf(%rip),%rdi
call   1030 <printf@plt>
jmp    11ad <main+0x7d>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xeb8(%rip),%rdi
call   1040 <printf@plt>
lea    0xec7(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf@plt>
mov    0x4(%rsp),%edi
call   1050 <sieve_of_eratosthenes@plt>
test   %eax,%eax
lea    0xed3(%rip),%rcx
lea    0xea7(%rip),%rdx
cmove  %rcx,%rdx
cmp    $0x1,%eax
lea    0xed5(%rip),%rdi
cmovne %rdx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [27 x i8] c"Enter a positive integer: \00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [28 x i8] c"Your number was not prime.\0A\00"
@.str.3 = [24 x i8] c"Your number was prime.\0A\00"
@.str.4 = [38 x i8] c"Error: Something unexpected happened\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 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 = call i32 @sieve_of_eratosthenes(i32 %6)
store i32 %7, i32* %3
%8 = load i32, i32* %3
%9 = icmp eq i32 %8, 1
br i1 %9, label %10, label %12
10: ; preds = %0
%11 = call i32 @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
br label %20
12: ; preds = %0
%13 = load i32, i32* %3
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %12
%16 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0))
br label %19
17: ; preds = %12
%18 = call i32 @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.4, i64 0, i64 0))
br label %19
19: ; preds = %17, %15
br label %20
20: ; preds = %19, %10
ret i32 0
}

LLVM IR (-O2):
@.str = [27 x i8] c"Enter a positive integer: \00"
@.str.1 = [3 x i8] c"%i\00"
@str = [37 x i8] c"Error: Something unexpected happened\00"
@str.5 = [23 x i8] c"Your number was prime.\00"
@str.6 = [27 x i8] c"Your number was not prime.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([27 x i8], [27 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 i32 @sieve_of_eratosthenes(i32 %5)
%7 = icmp eq i32 %6, 0
%8 = select i1 %7, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @str.5, i64 0, i64 0), i8* getelementptr inbounds ([37 x i8], [37 x i8]* @str, i64 0, i64 0)
%9 = icmp eq i32 %6, 1
%10 = select i1 %9, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @str.6, i64 0, i64 0), i8* %8
%11 = call i32 @puts(i8* dereferenceable(1) %10)
ret i32 0
}