#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 /*<<< orphan*/ space(int, int *, int);
int main(void) {
  int number, i, size;
  printf("Enter the size of the array with respect to the number of digits: ");
  scanf("%d", &size);
  int array[size];
  printf("Enter a number (%d-digits): ", size);
  scanf("%d", &number);
  space(number, array, size);
  printf("The number is now: ");
  for (i = size - 1; i >= 0; i--)
    printf("%d ", array[i]);
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeef(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x10(%rbp),%eax
mov    %rsp,%rcx
mov    %rcx,-0x18(%rbp)
lea    0xf(,%rax,4),%rdx
and    $0xfffffffffffffff0,%rdx
mov    %rsp,%rcx
sub    %rdx,%rcx
mov    %rcx,-0x28(%rbp)
mov    %rcx,%rsp
mov    %rax,-0x20(%rbp)
mov    -0x10(%rbp),%esi
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xea7(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x28(%rbp),%rsi
mov    -0x8(%rbp),%edi
mov    -0x10(%rbp),%edx
call   1030 <space@plt>
lea    0xea8(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x10(%rbp),%eax
sub    $0x1,%eax
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jl     11fc <main+0xcc>
mov    -0x28(%rbp),%rax
movslq -0xc(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe90(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0xc(%rbp)
jmp    11cb <main+0x9b>
lea    0xe78(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x18(%rbp),%rax
mov    %rax,%rsp
mov    -0x4(%rbp),%eax
mov    %rbp,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
mov    %rsp,%rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xeaa(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xedf(%rip),%r14
lea    -0x24(%rbp),%rsi
mov    %r14,%rdi
call   1060 <scanf@plt>
mov    %rsp,%r15
mov    -0x24(%rbp),%eax
mov    %rsp,%r12
lea    0xf(,%rax,4),%rax
and    $0xfffffffffffffff0,%rax
sub    %rax,%r12
mov    %r12,%rsp
mov    -0x24(%rbp),%esi
lea    0xeb1(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    -0x28(%rbp),%rsi
mov    %r14,%rdi
call   1060 <scanf@plt>
mov    -0x28(%rbp),%edi
mov    -0x24(%rbp),%edx
mov    %r12,%rsi
call   1030 <space@plt>
lea    0xea6(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    -0x24(%rbp),%ebx
test   %ebx,%ebx
jle    11fb <main+0xbb>
add    $0x1,%rbx
lea    0xea1(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
lea    -0x2(%rbx),%eax
mov    (%r12,%rax,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0xffffffffffffffff,%rbx
cmp    $0x1,%rbx
ja     11e0 <main+0xa0>
mov    $0xa,%edi
call   1040 <putchar@plt>
mov    %r15,%rsp
xor    %eax,%eax
lea    -0x20(%rbp),%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [67 x i8] c"Enter the size of the array with respect to the number of digits: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"Enter a number (%d-digits): \00"
@.str.3 = [20 x i8] c"The number is now: \00"
@.str.4 = [4 x i8] c"%d \00"
@.str.5 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i64
store i32 0, i32* %1
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([67 x i8], [67 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%9 = load i32, i32* %4
%10 = zext i32 %9 to i64
%11 = call i8* @llvm.stacksave()
store i8* %11, i8** %5
%12 = alloca i32, i64 %10
store i64 %10, i64* %6
%13 = load i32, i32* %4
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i32 %13)
%15 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%16 = load i32, i32* %2
%17 = load i32, i32* %4
%18 = call i32 @space(i32 %16, i32* %12, i32 %17)
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%20 = load i32, i32* %4
%21 = sub nsw i32 %20, 1
store i32 %21, i32* %3
br label %22
22: ; preds = %31, %0
%23 = load i32, i32* %3
%24 = icmp sge i32 %23, 0
br i1 %24, label %25, label %34
25: ; preds = %22
%26 = load i32, i32* %3
%27 = sext i32 %26 to i64
%28 = getelementptr inbounds i32, i32* %12, i64 %27
%29 = load i32, i32* %28
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %29)
br label %31
31: ; preds = %25
%32 = load i32, i32* %3
%33 = add nsw i32 %32, -1
store i32 %33, i32* %3
br label %22
34: ; preds = %22
%35 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
store i32 0, i32* %1
%36 = load i8*, i8** %5
%37 = load i32, i32* %1
ret i32 %37
}

LLVM IR (-O2):
@.str = [67 x i8] c"Enter the size of the array with respect to the number of digits: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"Enter a number (%d-digits): \00"
@.str.3 = [20 x i8] c"The number is now: \00"
@.str.4 = [4 x i8] c"%d \00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([67 x i8], [67 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* %2)
%7 = load i32, i32* %2
%8 = zext i32 %7 to i64
%9 = call i8* @llvm.stacksave()
%10 = alloca i32, i64 %8
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i32 %11)
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%14 = load i32, i32* %1
%15 = load i32, i32* %2
%16 = call i32 @space(i32 %14, i32* %10, i32 %15)
%17 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%18 = load i32, i32* %2
%19 = icmp sgt i32 %18, 0
br i1 %19, label %20, label %30
20: ; preds = %0
%21 = zext i32 %18 to i64
br label %22
22: ; preds = %20, %22
%23 = phi i64 [ %21, %20 ], [ %24, %22 ]
%24 = add nsw i64 %23, -1
%25 = and i64 %24, 4294967295
%26 = getelementptr inbounds i32, i32* %10, i64 %25
%27 = load i32, i32* %26
%28 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %27)
%29 = icmp ugt i64 %23, 1
br i1 %29, label %22, label %30
30: ; preds = %22, %0
%31 = call i32 @putchar(i32 10)
ret i32 0
}