#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 i, j, rows;
  printf("numero de filas : ");
  scanf("%d", &rows);
  for (i = 1; i <= rows; i++) {
    for (j = i; j <= rows; 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    0xed1(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x1,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jg     11a4 <main+0x84>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jg     118a <main+0x6a>
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1164 <main+0x44>
lea    0xe87(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%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    0xec1(%rip),%rdi
call   1040 <printf@plt>
lea    0xec8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%eax
test   %eax,%eax
jle    11b5 <main+0x85>
mov    $0x1,%r14d
xor    %ebx,%ebx
jmp    118d <main+0x5d>
nopw   0x0(%rax,%rax,1)
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0x1(%r14),%ecx
mov    0xc(%rsp),%eax
add    $0x1,%ebx
cmp    %eax,%r14d
mov    %ecx,%r14d
jge    11b5 <main+0x85>
cmp    %eax,%r14d
jg     1170 <main+0x40>
mov    %ebx,%ebp
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    $0x2a,%edi
call   1030 <putchar@plt>
add    $0x1,%ebp
cmp    0xc(%rsp),%ebp
jl     11a0 <main+0x70>
jmp    1170 <main+0x40>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [19 x i8] c"numero de filas : \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 ([19 x i8], [19 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* %4)
store i32 1, i32* %2
br label %7
7: ; preds = %24, %0
%8 = load i32, i32* %2
%9 = load i32, i32* %4
%10 = icmp sle i32 %8, %9
br i1 %10, label %11, label %27
11: ; preds = %7
%12 = load i32, i32* %2
store i32 %12, i32* %3
br label %13
13: ; preds = %19, %11
%14 = load i32, i32* %3
%15 = load i32, i32* %4
%16 = icmp sle i32 %14, %15
br i1 %16, label %17, label %22
17: ; preds = %13
%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* %3
%21 = add nsw i32 %20, 1
store i32 %21, i32* %3
br label %13
22: ; preds = %13
%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* %2
%26 = add nsw i32 %25, 1
store i32 %26, i32* %2
br label %7
27: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"numero de filas : \00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 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 %22, label %7
7: ; preds = %0, %17
%8 = phi i32 [ %20, %17 ], [ %5, %0 ]
%9 = phi i32 [ %19, %17 ], [ 1, %0 ]
%10 = icmp sgt i32 %9, %8
br i1 %10, label %17, label %11
11: ; preds = %7, %11
%12 = phi i32 [ %14, %11 ], [ %9, %7 ]
%13 = call i32 @putchar(i32 42)
%14 = add nuw nsw i32 %12, 1
%15 = load i32, i32* %1
%16 = icmp slt i32 %12, %15
br i1 %16, label %11, label %17
17: ; preds = %11, %7
%18 = call i32 @putchar(i32 10)
%19 = add nuw nsw i32 %9, 1
%20 = load i32, i32* %1
%21 = icmp slt i32 %9, %20
br i1 %21, label %7, label %22
22: ; preds = %17, %0
ret i32 0
}