#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*/ system(char *);
int main() {
  int i, N, S = 0;
  do {
    printf("\n Inserisci un numero positivo N: ");
    scanf("%d", &N);
  } while (N <= 0);
  i = 0;
  while (i < N) {
    S = S + (i + i + 1);
    i++;
  }
  printf("Il quadrato del numero inserito e': %d \n", S);
  system("pause");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec8(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,-0xc(%rbp)
jle    1146 <main+0x16>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    11a0 <main+0x70>
mov    -0x10(%rbp),%eax
mov    -0x8(%rbp),%ecx
add    -0x8(%rbp),%ecx
add    $0x1,%ecx
add    %ecx,%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1175 <main+0x45>
mov    -0x10(%rbp),%esi
lea    0xe7c(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe97(%rip),%rdi
call   1030 <system@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    0xec0(%rip),%r14
lea    0xedc(%rip),%r15
lea    0xc(%rsp),%rbx
nopl   0x0(%rax)
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%eax
test   %eax,%eax
jle    1150 <main+0x20>
lea    (%rax,%rax,2),%ecx
lea    -0x1(%rax),%edx
add    $0xfffffffe,%eax
imul   %edx,%eax
and    $0xfffffffe,%eax
lea    (%rax,%rcx,1),%esi
add    $0xfffffffe,%esi
lea    0xe9d(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeb8(%rip),%rdi
call   1030 <system@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [35 x i8] c"\0A Inserisci un numero positivo N: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [41 x i8] c"Il quadrato del numero inserito e': %d \0A\00"
@.str.3 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %4
br label %5
5: ; preds = %8, %0
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
br label %8
8: ; preds = %5
%9 = load i32, i32* %3
%10 = icmp sle i32 %9, 0
br i1 %10, label %5, label %11
11: ; preds = %8
store i32 0, i32* %2
br label %12
12: ; preds = %16, %11
%13 = load i32, i32* %2
%14 = load i32, i32* %3
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %25
16: ; preds = %12
%17 = load i32, i32* %4
%18 = load i32, i32* %2
%19 = load i32, i32* %2
%20 = add nsw i32 %18, %19
%21 = add nsw i32 %20, 1
%22 = add nsw i32 %17, %21
store i32 %22, i32* %4
%23 = load i32, i32* %2
%24 = add nsw i32 %23, 1
store i32 %24, i32* %2
br label %12
25: ; preds = %12
%26 = load i32, i32* %4
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.2, i64 0, i64 0), i32 %26)
%28 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [35 x i8] c"\0A Inserisci un numero positivo N: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [41 x i8] c"Il quadrato del numero inserito e': %d \0A\00"
@.str.3 = [6 x i8] c"pause\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %3, %0
%4 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 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* %1)
%6 = load i32, i32* %1
%7 = icmp slt i32 %6, 1
br i1 %7, label %3, label %8
8: ; preds = %3
%9 = mul i32 %6, 3
%10 = add nsw i32 %6, -1
%11 = add nsw i32 %6, -2
%12 = mul i32 %10, %11
%13 = and i32 %12, -2
%14 = add i32 %9, %13
%15 = add i32 %14, -2
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([41 x i8], [41 x i8]* @.str.2, i64 0, i64 0), i32 %15)
%17 = call i32 @system(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}