#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 iter, i, j;
  printf("Cuantos niveles?\n");
  scanf("%d", &iter);
  for (i = 0; i < iter; i++) {
    for (j = 0; j < (i + 1); j++) {
      printf("*");
    }
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xed0(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11aa <main+0x8a>
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
mov    -0xc(%rbp),%ecx
add    $0x1,%ecx
cmp    %ecx,%eax
jge    1190 <main+0x70>
lea    0xe98(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1165 <main+0x45>
lea    0xe79(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1152 <main+0x32>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xec4(%rip),%rdi
call   1040 <puts@plt>
lea    0xeb5(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,0xc(%rsp)
jle    11a7 <main+0x77>
xor    %r14d,%r14d
mov    $0x1,%ebx
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    %ebx,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    $0x2a,%edi
call   1030 <putchar@plt>
add    $0xffffffff,%ebp
jne    1180 <main+0x50>
add    $0x1,%r14d
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x1,%ebx
cmp    0xc(%rsp),%r14d
jl     1170 <main+0x40>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Cuantos niveles?\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [2 x i8] c"*\00"
@.str.3 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 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 0, i32* %3
br label %7
7: ; preds = %24, %0
%8 = load i32, i32* %3
%9 = load i32, i32* %2
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %27
11: ; preds = %7
store i32 0, i32* %4
br label %12
12: ; preds = %19, %11
%13 = load i32, i32* %4
%14 = load i32, i32* %3
%15 = add nsw i32 %14, 1
%16 = icmp slt i32 %13, %15
br i1 %16, label %17, label %22
17: ; preds = %12
%18 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %19
19: ; preds = %17
%20 = load i32, i32* %4
%21 = add nsw i32 %20, 1
store i32 %21, i32* %4
br label %12
22: ; preds = %12
%23 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
br label %24
24: ; preds = %22
%25 = load i32, i32* %3
%26 = add nsw i32 %25, 1
store i32 %26, i32* %3
br label %7
27: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@str = [17 x i8] c"Cuantos niveles?\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 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 sgt i32 %5, 0
br i1 %6, label %7, label %21
7: ; preds = %0, %15
%8 = phi i32 [ %20, %15 ], [ 1, %0 ]
%9 = phi i32 [ %16, %15 ], [ 0, %0 ]
br label %10
10: ; preds = %7, %10
%11 = phi i32 [ 0, %7 ], [ %13, %10 ]
%12 = call i32 @putchar(i32 42)
%13 = add nuw nsw i32 %11, 1
%14 = icmp eq i32 %13, %8
br i1 %14, label %15, label %10
15: ; preds = %10
%16 = add nuw nsw i32 %9, 1
%17 = call i32 @putchar(i32 10)
%18 = load i32, i32* %1
%19 = icmp slt i32 %16, %18
%20 = add nuw i32 %8, 1
br i1 %19, label %7, label %21
21: ; preds = %15, %0
ret i32 0
}