#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 */
scalar_t__ pow(int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int n, sum = 0;
  printf("Enter how many natural numbers you want to sum up: ");
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    sum += pow(i, 2);
  }
  printf("The total sum is %d", sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeea(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x1,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0x8(%rbp),%eax
jg     119f <main+0x6f>
mov    -0x10(%rbp),%edi
mov    $0x2,%esi
call   1050 <pow@plt>
mov    %rax,%rcx
movslq -0xc(%rbp),%rax
add    %rcx,%rax
mov    %eax,-0xc(%rbp)
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    116b <main+0x3b>
mov    -0xc(%rbp),%esi
lea    0xe8b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xec6(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xefb(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,0x4(%rsp)
jle    1177 <main+0x47>
xor    %ebp,%ebp
xor    %ebx,%ebx
nop
add    $0x1,%ebp
mov    %ebp,%edi
mov    $0x2,%esi
call   1050 <pow@plt>
add    %eax,%ebx
cmp    0x4(%rsp),%ebp
jl     1160 <main+0x30>
lea    0xeb6(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [52 x i8] c"Enter how many natural numbers you want to sum up: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"The total sum is %d\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* %3
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([52 x i8], [52 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)
store i32 1, i32* %4
br label %7
7: ; preds = %18, %0
%8 = load i32, i32* %4
%9 = load i32, i32* %2
%10 = icmp sle i32 %8, %9
br i1 %10, label %11, label %21
11: ; preds = %7
%12 = load i32, i32* %4
%13 = call i64 @pow(i32 %12, i32 2)
%14 = load i32, i32* %3
%15 = sext i32 %14 to i64
%16 = add nsw i64 %15, %13
%17 = trunc i64 %16 to i32
store i32 %17, i32* %3
br label %18
18: ; preds = %11
%19 = load i32, i32* %4
%20 = add nsw i32 %19, 1
store i32 %20, i32* %4
br label %7
21: ; preds = %7
%22 = load i32, i32* %3
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %22)
ret i32 0
}

LLVM IR (-O2):
@.str = [52 x i8] c"Enter how many natural numbers you want to sum up: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"The total sum is %d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([52 x i8], [52 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 slt i32 %5, 1
br i1 %6, label %7, label %10
7: ; preds = %10, %0
%8 = phi i32 [ 0, %0 ], [ %15, %10 ]
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %8)
ret i32 0
10: ; preds = %0, %10
%11 = phi i32 [ %16, %10 ], [ 1, %0 ]
%12 = phi i32 [ %15, %10 ], [ 0, %0 ]
%13 = call i64 @pow(i32 %11, i32 2)
%14 = trunc i64 %13 to i32
%15 = add i32 %12, %14
%16 = add nuw nsw i32 %11, 1
%17 = load i32, i32* %1
%18 = icmp slt i32 %11, %17
br i1 %18, label %10, label %7
}