#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*/ getchar();
int /*<<< orphan*/ printf(char *, int, int);
int main(void) {
  int num = 1;
  while (num < 21) {
    printf("%4d %6d\n", num, num * num);
    num++;
  }
  getchar();
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
cmpl   $0x15,-0x8(%rbp)
jge    1164 <main+0x44>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%edx
imul   -0x8(%rbp),%edx
lea    0xeaf(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1136 <main+0x16>
mov    $0x0,%al
call   1040 <getchar@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xed8(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x1,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x4,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x9,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
mov    $0x10,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
mov    $0x19,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
mov    $0x24,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
mov    $0x31,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
mov    $0x40,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
mov    $0x51,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
mov    $0x64,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xb,%esi
mov    $0x79,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xc,%esi
mov    $0x90,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xd,%esi
mov    $0xa9,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xe,%esi
mov    $0xc4,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
mov    $0xe1,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x10,%esi
mov    $0x100,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x11,%esi
mov    $0x121,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x12,%esi
mov    $0x144,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x13,%esi
mov    $0x169,%edx
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x14,%esi
mov    $0x190,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [9 x i8] c"%4d %6d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %2
br label %3
3: ; preds = %6, %0
%4 = load i32, i32* %2
%5 = icmp slt i32 %4, 21
br i1 %5, label %6, label %14
6: ; preds = %3
%7 = load i32, i32* %2
%8 = load i32, i32* %2
%9 = load i32, i32* %2
%10 = mul nsw i32 %8, %9
%11 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 %7, i32 %10)
%12 = load i32, i32* %2
%13 = add nsw i32 %12, 1
store i32 %13, i32* %2
br label %3
14: ; preds = %3
%15 = call i32 (...) @getchar()
ret i32 0
}

LLVM IR (-O2):
@.str = [9 x i8] c"%4d %6d\0A\00"
define i32 @main() {
%1 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 1, i32 1)
%2 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 2, i32 4)
%3 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 3, i32 9)
%4 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 4, i32 16)
%5 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 5, i32 25)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 6, i32 36)
%7 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 7, i32 49)
%8 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 8, i32 64)
%9 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 9, i32 81)
%10 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 10, i32 100)
%11 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 11, i32 121)
%12 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 12, i32 144)
%13 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 13, i32 169)
%14 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 14, i32 196)
%15 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 15, i32 225)
%16 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 16, i32 256)
%17 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 17, i32 289)
%18 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 18, i32 324)
%19 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 19, i32 361)
%20 = tail call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i64 0, i64 0), i32 20, i32 400)
%21 = tail call i32 (...) @getchar()
ret i32 0
}