#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 */
scalar_t__ isPowerOfTwo(int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int num;
  printf("Enter a number to check:\n");
  scanf("%d", &num);
  if (isPowerOfTwo(num))
    printf("The number is a power of two");
  else
    printf("The number is not a power of two");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
call   1040 <printf@plt>
lea    0xec8(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%edi
call   1030 <isPowerOfTwo@plt>
cmp    $0x0,%rax
je     117e <main+0x4e>
lea    0xea9(%rip),%rdi
call   1040 <printf@plt>
jmp    118a <main+0x5a>
lea    0xeb5(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xef9(%rip),%rdi
call   1030 <puts@plt>
lea    0xeac(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf@plt>
mov    0x4(%rsp),%edi
call   1040 <isPowerOfTwo@plt>
test   %rax,%rax
lea    0xeaf(%rip),%rax
lea    0xe8b(%rip),%rdi
cmove  %rax,%rdi
call   1050 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [26 x i8] c"Enter a number to check:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"The number is a power of two\00"
@.str.3 = [33 x i8] c"The number is not a power of two\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 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* %2)
%5 = load i32, i32* %2
%6 = call i64 @isPowerOfTwo(i32 %5)
%7 = icmp ne i64 %6, 0
br i1 %7, label %8, label %10
8: ; preds = %0
%9 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0))
br label %12
10: ; preds = %0
%11 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0))
br label %12
12: ; preds = %10, %8
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [29 x i8] c"The number is a power of two\00"
@.str.3 = [33 x i8] c"The number is not a power of two\00"
@str = [25 x i8] c"Enter a number to check:\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 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 = call i64 @isPowerOfTwo(i32 %5)
%7 = icmp eq i64 %6, 0
%8 = select i1 %7, i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0)
%9 = call i32 @printf(i8* dereferenceable(1) %8)
ret i32 0
}