#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, k, num;
  printf("enter the size of pattern: ");
  scanf("%d", &num);
  for (i = 0; i < num; i++) {
    for (j = 0; j < num - i - 1; j++) {
      printf("  ");
    }
    for (k = 0; k <= i * 2; k++) {
      printf("* ");
    }
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xeda(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    11df <main+0xbf>
movl   $0x0,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    -0x14(%rbp),%ecx
sub    -0x8(%rbp),%ecx
sub    $0x1,%ecx
cmp    %ecx,%eax
jge    1193 <main+0x73>
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1165 <main+0x45>
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
mov    -0x8(%rbp),%ecx
shl    $0x1,%ecx
cmp    %ecx,%eax
jg     11c5 <main+0xa5>
lea    0xe70(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    119a <main+0x7a>
lea    0xe59(%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    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
lea    0xebe(%rip),%rdi
call   1040 <printf@plt>
lea    0xece(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%eax
test   %eax,%eax
jle    11d8 <main+0xa8>
xor    %r12d,%r12d
mov    $0x1,%r15d
lea    0xeaf(%rip),%r14
lea    0xeab(%rip),%r13
nopw   0x0(%rax,%rax,1)
mov    %r12d,%ebp
not    %ebp
add    %ebp,%eax
test   %eax,%eax
jle    11a5 <main+0x75>
xor    %ebx,%ebx
nopl   (%rax)
mov    %r14,%rdi
call   1040 <printf@plt>
add    $0x1,%ebx
mov    0x4(%rsp),%eax
add    %ebp,%eax
cmp    %eax,%ebx
jl     1190 <main+0x60>
mov    %r15d,%ebx
nopl   0x0(%rax,%rax,1)
mov    %r13,%rdi
call   1040 <printf@plt>
add    $0xffffffff,%ebx
jne    11b0 <main+0x80>
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x1,%r12d
mov    0x4(%rsp),%eax
add    $0x2,%r15d
cmp    %eax,%r12d
jl     1180 <main+0x50>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [28 x i8] c"enter the size of pattern: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [3 x i8] c" \00"
@.str.3 = [3 x i8] c"* \00"
@.str.4 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 @printf(i8* getelementptr inbounds ([28 x i8], [28 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* %5)
store i32 0, i32* %2
br label %8
8: ; preds = %38, %0
%9 = load i32, i32* %2
%10 = load i32, i32* %5
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %41
12: ; preds = %8
store i32 0, i32* %3
br label %13
13: ; preds = %22, %12
%14 = load i32, i32* %3
%15 = load i32, i32* %5
%16 = load i32, i32* %2
%17 = sub nsw i32 %15, %16
%18 = sub nsw i32 %17, 1
%19 = icmp slt i32 %14, %18
br i1 %19, label %20, label %25
20: ; preds = %13
%21 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
br label %22
22: ; preds = %20
%23 = load i32, i32* %3
%24 = add nsw i32 %23, 1
store i32 %24, i32* %3
br label %13
25: ; preds = %13
store i32 0, i32* %4
br label %26
26: ; preds = %33, %25
%27 = load i32, i32* %4
%28 = load i32, i32* %2
%29 = mul nsw i32 %28, 2
%30 = icmp sle i32 %27, %29
br i1 %30, label %31, label %36
31: ; preds = %26
%32 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
br label %33
33: ; preds = %31
%34 = load i32, i32* %4
%35 = add nsw i32 %34, 1
store i32 %35, i32* %4
br label %26
36: ; preds = %26
%37 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
br label %38
38: ; preds = %36
%39 = load i32, i32* %2
%40 = add nsw i32 %39, 1
store i32 %40, i32* %2
br label %8
41: ; preds = %8
ret i32 0
}

LLVM IR (-O2):
@.str = [28 x i8] c"enter the size of pattern: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [3 x i8] c" \00"
@.str.3 = [3 x i8] c"* \00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 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 %33
7: ; preds = %0, %27
%8 = phi i32 [ %30, %27 ], [ %5, %0 ]
%9 = phi i32 [ %32, %27 ], [ 1, %0 ]
%10 = phi i32 [ %29, %27 ], [ 0, %0 ]
%11 = xor i32 %10, -1
%12 = add i32 %8, %11
%13 = icmp sgt i32 %12, 0
br i1 %13, label %14, label %21
14: ; preds = %7, %14
%15 = phi i32 [ %17, %14 ], [ 0, %7 ]
%16 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%17 = add nuw nsw i32 %15, 1
%18 = load i32, i32* %1
%19 = add i32 %18, %11
%20 = icmp slt i32 %17, %19
br i1 %20, label %14, label %21
21: ; preds = %14, %7
br label %22
22: ; preds = %21, %22
%23 = phi i32 [ %25, %22 ], [ 0, %21 ]
%24 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%25 = add nuw i32 %23, 1
%26 = icmp eq i32 %25, %9
br i1 %26, label %27, label %22
27: ; preds = %22
%28 = call i32 @putchar(i32 10)
%29 = add nuw nsw i32 %10, 1
%30 = load i32, i32* %1
%31 = icmp slt i32 %29, %30
%32 = add nuw i32 %9, 2
br i1 %31, label %7, label %33
33: ; preds = %27, %0
ret i32 0
}