#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(void) {
  int i, n;
  printf("This program prints a table of squares.\n");
  printf("Enter number of entries in table: ");
  scanf("%d", &n);
  i = 1;
  while (i <= n) {
    printf("%10d%10d\n", i, i * i);
    i++;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xefa(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x1,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jg     1194 <main+0x74>
mov    -0x8(%rbp),%esi
mov    -0x8(%rbp),%edx
imul   -0x8(%rbp),%edx
lea    0xed0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1162 <main+0x42>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
lea    0xef6(%rip),%rdi
call   1030 <puts@plt>
lea    0xeba(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xecf(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,0x4(%rsp)
jle    118a <main+0x5a>
lea    0xeba(%rip),%rbx
xor    %ebp,%ebp
xchg   %ax,%ax
add    $0x1,%ebp
mov    %ebp,%edx
imul   %ebp,%edx
mov    %rbx,%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
cmp    0x4(%rsp),%ebp
jl     1170 <main+0x40>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [41 x i8] c"This program prints a table of squares.\0A\00"
@.str.1 = [35 x i8] c"Enter number of entries in table: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [10 x i8] c"%10d%10d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str, i64 0, i64 0))
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
store i32 1, i32* %2
br label %7
7: ; preds = %11, %0
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = icmp sle i32 %8, %9
br i1 %10, label %11, label %19
11: ; preds = %7
%12 = load i32, i32* %2
%13 = load i32, i32* %2
%14 = load i32, i32* %2
%15 = mul nsw i32 %13, %14
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i32 %12, i32 %15)
%17 = load i32, i32* %2
%18 = add nsw i32 %17, 1
store i32 %18, i32* %2
br label %7
19: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [35 x i8] c"Enter number of entries in table: \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [10 x i8] c"%10d%10d\0A\00"
@str = [40 x i8] c"This program prints a table of squares.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([35 x i8], [35 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = icmp slt i32 %6, 1
br i1 %7, label %15, label %8
8: ; preds = %0, %8
%9 = phi i32 [ %12, %8 ], [ 1, %0 ]
%10 = mul nsw i32 %9, %9
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i32 %9, i32 %10)
%12 = add nuw nsw i32 %9, 1
%13 = load i32, i32* %1
%14 = icmp slt i32 %9, %13
br i1 %14, label %8, label %15
15: ; preds = %8, %0
ret i32 0
}