#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__ isPowerOf2(long long);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, long long *);
int main() {
  long long n;
  printf("Enter number to check\n");
  scanf("%lld", &n);
  if (isPowerOf2(n))
    printf("%lld Is a power of 2\n", n);
  else
    printf("%lld Not a power of 2\n", n);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec3(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x10(%rbp),%rdi
call   1040 <isPowerOf2@plt>
cmp    $0x0,%rax
je     1187 <main+0x57>
mov    -0x10(%rbp),%rsi
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1199 <main+0x69>
mov    -0x10(%rbp),%rsi
lea    0xea0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xeea(%rip),%rdi
call   1030 <puts@plt>
lea    0xeac(%rip),%rdi
mov    %rsp,%rsi
call   1060 <scanf@plt>
mov    (%rsp),%rdi
call   1050 <isPowerOf2@plt>
test   %rax,%rax
mov    (%rsp),%rsi
lea    0xea8(%rip),%rax
lea    0xe8b(%rip),%rdi
cmove  %rax,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [23 x i8] c"Enter number to check\0A\00"
@.str.1 = [5 x i8] c"%lld\00"
@.str.2 = [22 x i8] c"%lld Is a power of 2\0A\00"
@.str.3 = [23 x i8] c"%lld Not a power of 2\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i64
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i64* %2)
%5 = load i64, i64* %2
%6 = call i64 @isPowerOf2(i64 %5)
%7 = icmp ne i64 %6, 0
br i1 %7, label %8, label %11
8: ; preds = %0
%9 = load i64, i64* %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0), i64 %9)
br label %14
11: ; preds = %0
%12 = load i64, i64* %2
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), i64 %12)
br label %14
14: ; preds = %11, %8
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [5 x i8] c"%lld\00"
@.str.2 = [22 x i8] c"%lld Is a power of 2\0A\00"
@.str.3 = [23 x i8] c"%lld Not a power of 2\0A\00"
@str = [22 x i8] c"Enter number to check\00"
define i32 @main() {
%1 = alloca i64
%2 = bitcast i64* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i64* %1)
%5 = load i64, i64* %1
%6 = call i64 @isPowerOf2(i64 %5)
%7 = icmp eq i64 %6, 0
%8 = load i64, i64* %1
%9 = select i1 %7, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0)
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %9, i64 %8)
ret i32 0
}