#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 n;
  int digits;
  printf("\nEnter an integer > ");
  scanf("%d", &n);
  printf("\n");
  digits = 1;
  if (n == 0)
    printf("0\n");
  while (n > 0) {
    digits = n % 10;
    printf("%d\n", digits);
    n = (n - digits) / 10;
  }
  printf("That's all, have a nice day!\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xee7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0xc(%rbp)
cmpl   $0x0,-0x8(%rbp)
jne    117a <main+0x5a>
lea    0xea5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    117f <main+0x5f>
cmpl   $0x0,-0x8(%rbp)
jle    11be <main+0x9e>
mov    -0x8(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0xc(%rbp)
mov    -0xc(%rbp),%esi
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
sub    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x8(%rbp)
jmp    117f <main+0x5f>
lea    0xe5a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xeb0(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xeb7(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    0xc(%rsp),%ebx
test   %ebx,%ebx
je     1180 <main+0x40>
test   %ebx,%ebx
jg     1194 <main+0x54>
jmp    11f2 <main+0xb2>
lea    0xeb2(%rip),%rdi
call   1040 <puts@plt>
mov    0xc(%rsp),%ebx
test   %ebx,%ebx
jle    11f2 <main+0xb2>
mov    $0xcccccccd,%r15d
lea    0xe77(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %ebx,%eax
imul   %r15,%rax
shr    $0x23,%rax
add    %eax,%eax
lea    (%rax,%rax,4),%eax
sub    %eax,%ebx
mov    %r14,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    0xc(%rsp),%eax
sub    %ebx,%eax
cltq
imul   $0x66666667,%rax,%rbx
mov    %rbx,%rcx
shr    $0x3f,%rcx
sar    $0x22,%rbx
add    %ecx,%ebx
mov    %ebx,0xc(%rsp)
cmp    $0x9,%eax
jg     11b0 <main+0x70>
lea    0xe23(%rip),%rdi
call   1040 <puts@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [21 x i8] c"\0AEnter an integer > \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [2 x i8] c"\0A\00"
@.str.3 = [3 x i8] c"0\0A\00"
@.str.4 = [4 x i8] c"%d\0A\00"
@.str.5 = [30 x i8] c"That's all, have a nice day!\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 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 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
store i32 1, i32* %3
%7 = load i32, i32* %2
%8 = icmp eq i32 %7, 0
br i1 %8, label %9, label %11
9: ; preds = %0
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
br label %11
11: ; preds = %9, %0
br label %12
12: ; preds = %15, %11
%13 = load i32, i32* %2
%14 = icmp sgt i32 %13, 0
br i1 %14, label %15, label %24
15: ; preds = %12
%16 = load i32, i32* %2
%17 = srem i32 %16, 10
store i32 %17, i32* %3
%18 = load i32, i32* %3
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %18)
%20 = load i32, i32* %2
%21 = load i32, i32* %3
%22 = sub nsw i32 %20, %21
%23 = sdiv i32 %22, 10
store i32 %23, i32* %2
br label %12
24: ; preds = %12
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [21 x i8] c"\0AEnter an integer > \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.4 = [4 x i8] c"%d\0A\00"
@str = [29 x i8] c"That's all, have a nice day!\00"
@str.6 = [2 x i8] c"0\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 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 = call i32 @putchar(i32 10)
%6 = load i32, i32* %1
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %11
8: ; preds = %0
%9 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str.6, i64 0, i64 0))
%10 = load i32, i32* %1
br label %11
11: ; preds = %8, %0
%12 = phi i32 [ %10, %8 ], [ %6, %0 ]
%13 = icmp sgt i32 %12, 0
br i1 %13, label %14, label %22
14: ; preds = %11, %14
%15 = phi i32 [ %20, %14 ], [ %12, %11 ]
%16 = urem i32 %15, 10
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %16)
%18 = load i32, i32* %1
%19 = sub nsw i32 %18, %16
%20 = sdiv i32 %19, 10
store i32 %20, i32* %1
%21 = icmp sgt i32 %19, 9
br i1 %21, label %14, label %22
22: ; preds = %14, %11
%23 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @str, i64 0, i64 0))
ret i32 0
}