#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*/ factor_rec(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int num = 0;
  printf("Please enter a number.\t");
  scanf("%d", &num);
  if (num == 1) {
    printf("1 is a unique number.\n");
  } else {
    printf("The prime factors of %d are\n", num);
    factor_rec(num);
  }
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebd(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x1,-0x8(%rbp)
jne    1181 <main+0x51>
lea    0xea6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    119a <main+0x6a>
mov    -0x8(%rbp),%esi
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%edi
call   1040 <factor_rec@plt>
lea    0xe8f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
movl   $0x0,0x4(%rsp)
lea    0xea0(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xeaa(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1070 <scanf@plt>
mov    0x4(%rsp),%esi
cmp    $0x1,%esi
jne    118f <main+0x3f>
lea    0xeb0(%rip),%rdi
call   1040 <puts@plt>
jmp    11a6 <main+0x56>
lea    0xe85(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0x4(%rsp),%edi
call   1060 <factor_rec@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [24 x i8] c"Please enter a number.\09\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [23 x i8] c"1 is a unique number.\0A\00"
@.str.3 = [29 x i8] c"The prime factors of %d are\0A\00"
@.str.4 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 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* %2)
%5 = load i32, i32* %2
%6 = icmp eq i32 %5, 1
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
br label %14
9: ; preds = %0
%10 = load i32, i32* %2
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i32 %10)
%12 = load i32, i32* %2
%13 = call i32 @factor_rec(i32 %12)
br label %14
14: ; preds = %9, %7
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [24 x i8] c"Please enter a number.\09\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [29 x i8] c"The prime factors of %d are\0A\00"
@str = [22 x i8] c"1 is a unique number.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 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 eq i32 %5, 1
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str, i64 0, i64 0))
br label %13
9: ; preds = %0
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i32 %5)
%11 = load i32, i32* %1
%12 = call i32 @factor_rec(i32 %11)
br label %13
13: ; preds = %9, %7
%14 = call i32 @putchar(i32 10)
ret i32 0
}