#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 main(void) {
  int row, col, ch = 65;
  for (row = 1; row <= 6; row++) {
    for (col = 1; col <= row; col++, ch++)
      printf("%c", ch);
    printf("\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x41,-0x10(%rbp)
movl   $0x1,-0x8(%rbp)
cmpl   $0x6,-0x8(%rbp)
jg     118e <main+0x7e>
movl   $0x1,-0xc(%rbp)
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jg     1172 <main+0x62>
mov    -0x10(%rbp),%esi
lea    0xeac(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0xc(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xc(%rbp)
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    113e <main+0x2e>
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    112d <main+0x1d>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
mov    $0x41,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x42,%edi
call   1030 <putchar@plt>
mov    $0x43,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x44,%edi
call   1030 <putchar@plt>
mov    $0x45,%edi
call   1030 <putchar@plt>
mov    $0x46,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x47,%edi
call   1030 <putchar@plt>
mov    $0x48,%edi
call   1030 <putchar@plt>
mov    $0x49,%edi
call   1030 <putchar@plt>
mov    $0x4a,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x4b,%edi
call   1030 <putchar@plt>
mov    $0x4c,%edi
call   1030 <putchar@plt>
mov    $0x4d,%edi
call   1030 <putchar@plt>
mov    $0x4e,%edi
call   1030 <putchar@plt>
mov    $0x4f,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    $0x50,%edi
call   1030 <putchar@plt>
mov    $0x51,%edi
call   1030 <putchar@plt>
mov    $0x52,%edi
call   1030 <putchar@plt>
mov    $0x53,%edi
call   1030 <putchar@plt>
mov    $0x54,%edi
call   1030 <putchar@plt>
mov    $0x55,%edi
call   1030 <putchar@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%c\00"
@.str.1 = [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
store i32 65, i32* %4
store i32 1, i32* %2
br label %5
5: ; preds = %23, %0
%6 = load i32, i32* %2
%7 = icmp sle i32 %6, 6
br i1 %7, label %8, label %26
8: ; preds = %5
store i32 1, i32* %3
br label %9
9: ; preds = %16, %8
%10 = load i32, i32* %3
%11 = load i32, i32* %2
%12 = icmp sle i32 %10, %11
br i1 %12, label %13, label %21
13: ; preds = %9
%14 = load i32, i32* %4
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %14)
br label %16
16: ; preds = %13
%17 = load i32, i32* %3
%18 = add nsw i32 %17, 1
store i32 %18, i32* %3
%19 = load i32, i32* %4
%20 = add nsw i32 %19, 1
store i32 %20, i32* %4
br label %9
21: ; preds = %9
%22 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %23
23: ; preds = %21
%24 = load i32, i32* %2
%25 = add nsw i32 %24, 1
store i32 %25, i32* %2
br label %5
26: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
define i32 @main() {
%1 = tail call i32 @putchar(i32 65)
%2 = tail call i32 @putchar(i32 10)
%3 = tail call i32 @putchar(i32 66)
%4 = tail call i32 @putchar(i32 67)
%5 = tail call i32 @putchar(i32 10)
%6 = tail call i32 @putchar(i32 68)
%7 = tail call i32 @putchar(i32 69)
%8 = tail call i32 @putchar(i32 70)
%9 = tail call i32 @putchar(i32 10)
%10 = tail call i32 @putchar(i32 71)
%11 = tail call i32 @putchar(i32 72)
%12 = tail call i32 @putchar(i32 73)
%13 = tail call i32 @putchar(i32 74)
%14 = tail call i32 @putchar(i32 10)
%15 = tail call i32 @putchar(i32 75)
%16 = tail call i32 @putchar(i32 76)
%17 = tail call i32 @putchar(i32 77)
%18 = tail call i32 @putchar(i32 78)
%19 = tail call i32 @putchar(i32 79)
%20 = tail call i32 @putchar(i32 10)
%21 = tail call i32 @putchar(i32 80)
%22 = tail call i32 @putchar(i32 81)
%23 = tail call i32 @putchar(i32 82)
%24 = tail call i32 @putchar(i32 83)
%25 = tail call i32 @putchar(i32 84)
%26 = tail call i32 @putchar(i32 85)
%27 = tail call i32 @putchar(i32 10)
ret i32 0
}