#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 height = 1, c = 1, n, x;
  printf("How tall you want the pyramid to be? : ");
  scanf("%d", &n);
  x = n;
  for (c = 1; height <= n; height++) {
    for (c = 1; c < x; c++)
      printf(" ");
    x--;
    for (c = 1; c <= 2 * height - 1; c++)
      printf("I");
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
movl   $0x1,-0xc(%rbp)
lea    0xebc(%rip),%rdi
call   1030 <printf@plt>
lea    0xed8(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
movl   $0x1,-0xc(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jg     11f7 <main+0xd7>
movl   $0x1,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    119f <main+0x7f>
lea    0xe9a(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    1179 <main+0x59>
mov    -0x14(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x14(%rbp)
movl   $0x1,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    -0x8(%rbp),%ecx
shl    $0x1,%ecx
sub    $0x1,%ecx
cmp    %ecx,%eax
jg     11dd <main+0xbd>
lea    0xe61(%rip),%rdi
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
jmp    11af <main+0x8f>
lea    0xe49(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1166 <main+0x46>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xebd(%rip),%rdi
call   1040 <printf@plt>
lea    0xed9(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%r14d
test   %r14d,%r14d
jle    11d8 <main+0xa8>
mov    $0x1,%r12d
mov    %r14d,%r15d
mov    $0x1,%ebx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
cmp    $0x2,%r15d
jl     11a1 <main+0x71>
mov    %r14d,%ebp
nopl   0x0(%rax)
mov    $0x20,%edi
call   1030 <putchar@plt>
add    $0xffffffff,%ebp
cmp    %ebp,%ebx
jne    1190 <main+0x60>
add    $0xffffffff,%r15d
mov    %r12d,%ebp
nopl   0x0(%rax,%rax,1)
mov    $0x49,%edi
call   1030 <putchar@plt>
add    $0xffffffff,%ebp
jne    11b0 <main+0x80>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0x1(%rbx),%eax
add    $0x2,%r12d
cmp    0xc(%rsp),%ebx
mov    %eax,%ebx
jl     1180 <main+0x50>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [40 x i8] c"How tall you want the pyramid to be? : \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [2 x i8] c" \00"
@.str.3 = [2 x i8] c"I\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
store i32 1, i32* %2
store i32 1, i32* %3
%6 = call i32 @printf(i8* getelementptr inbounds ([40 x i8], [40 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* %4)
%8 = load i32, i32* %4
store i32 %8, i32* %5
store i32 1, i32* %3
br label %9
9: ; preds = %39, %0
%10 = load i32, i32* %2
%11 = load i32, i32* %4
%12 = icmp sle i32 %10, %11
br i1 %12, label %13, label %42
13: ; preds = %9
store i32 1, i32* %3
br label %14
14: ; preds = %20, %13
%15 = load i32, i32* %3
%16 = load i32, i32* %5
%17 = icmp slt i32 %15, %16
br i1 %17, label %18, label %23
18: ; preds = %14
%19 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %20
20: ; preds = %18
%21 = load i32, i32* %3
%22 = add nsw i32 %21, 1
store i32 %22, i32* %3
br label %14
23: ; preds = %14
%24 = load i32, i32* %5
%25 = add nsw i32 %24, -1
store i32 %25, i32* %5
store i32 1, i32* %3
br label %26
26: ; preds = %34, %23
%27 = load i32, i32* %3
%28 = load i32, i32* %2
%29 = mul nsw i32 2, %28
%30 = sub nsw i32 %29, 1
%31 = icmp sle i32 %27, %30
br i1 %31, label %32, label %37
32: ; preds = %26
%33 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
br label %34
34: ; preds = %32
%35 = load i32, i32* %3
%36 = add nsw i32 %35, 1
store i32 %36, i32* %3
br label %26
37: ; preds = %26
%38 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
br label %39
39: ; preds = %37
%40 = load i32, i32* %2
%41 = add nsw i32 %40, 1
store i32 %41, i32* %2
br label %9
42: ; preds = %9
ret i32 0
}

LLVM IR (-O2):
@.str = [40 x i8] c"How tall you want the pyramid to be? : \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 ([40 x i8], [40 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 %30, label %7
7: ; preds = %0, %24
%8 = phi i32 [ %29, %24 ], [ 2, %0 ]
%9 = phi i32 [ %18, %24 ], [ %5, %0 ]
%10 = phi i32 [ %26, %24 ], [ 1, %0 ]
%11 = icmp sgt i32 %9, 1
br i1 %11, label %12, label %17
12: ; preds = %7, %12
%13 = phi i32 [ %15, %12 ], [ 1, %7 ]
%14 = call i32 @putchar(i32 32)
%15 = add nuw nsw i32 %13, 1
%16 = icmp eq i32 %15, %9
br i1 %16, label %17, label %12
17: ; preds = %12, %7
%18 = add nsw i32 %9, -1
br label %19
19: ; preds = %17, %19
%20 = phi i32 [ %22, %19 ], [ 1, %17 ]
%21 = call i32 @putchar(i32 73)
%22 = add nuw i32 %20, 1
%23 = icmp eq i32 %22, %8
br i1 %23, label %24, label %19
24: ; preds = %19
%25 = call i32 @putchar(i32 10)
%26 = add nuw nsw i32 %10, 1
%27 = load i32, i32* %1
%28 = icmp slt i32 %10, %27
%29 = add i32 %8, 2
br i1 %28, label %7, label %30
30: ; preds = %24, %0
ret i32 0
}