#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 *);
void main() {
  int n, soma = 1;
  printf("Informe o valor de n: ");
  scanf("%d", &n);
  while (n != 0) {
    soma += n;
    n--;
  }
  printf("%d\n", soma);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x1,-0x8(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed3(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
cmpl   $0x0,-0x4(%rbp)
je     116e <main+0x4e>
mov    -0x4(%rbp),%eax
add    -0x8(%rbp),%eax
mov    %eax,-0x8(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x4(%rbp)
jmp    114d <main+0x2d>
mov    -0x8(%rbp),%esi
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%eax
test   %eax,%eax
je     116b <main+0x4b>
lea    -0x1(%rax),%ecx
mov    %ecx,%esi
imul   %ecx,%esi
add    %eax,%esi
add    $0xfffffffe,%eax
imul   %rcx,%rax
shr    %rax
sub    %eax,%esi
add    $0x1,%esi
movl   $0x0,0x4(%rsp)
jmp    1170 <main+0x50>
mov    $0x1,%esi
lea    0xea3(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
pop    %rax
ret

LLVM IR (-O0):
@.str = [23 x i8] c"Informe o valor de n: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\0A\00"
define void @main() {
%1 = alloca i32
%2 = alloca i32
store i32 1, i32* %2
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 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)
br label %5
5: ; preds = %8, %0
%6 = load i32, i32* %1
%7 = icmp ne i32 %6, 0
br i1 %7, label %8, label %14
8: ; preds = %5
%9 = load i32, i32* %1
%10 = load i32, i32* %2
%11 = add nsw i32 %10, %9
store i32 %11, i32* %2
%12 = load i32, i32* %1
%13 = add nsw i32 %12, -1
store i32 %13, i32* %1
br label %5
14: ; preds = %5
%15 = load i32, i32* %2
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %15)
ret void
}

LLVM IR (-O2):
@.str = [23 x i8] c"Informe o valor de n: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\0A\00"
define void @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 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, 0
br i1 %6, label %19, label %7
7: ; preds = %0
%8 = add i32 %5, -1
%9 = mul i32 %8, %8
%10 = add i32 %5, %9
%11 = zext i32 %8 to i33
%12 = add i32 %5, -2
%13 = zext i32 %12 to i33
%14 = mul i33 %11, %13
%15 = lshr i33 %14, 1
%16 = trunc i33 %15 to i32
%17 = add i32 %10, 1
%18 = sub i32 %17, %16
store i32 0, i32* %1
br label %19
19: ; preds = %7, %0
%20 = phi i32 [ %18, %7 ], [ 1, %0 ]
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %20)
ret void
}