#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*/ assert(int);
int isPowerOfFour(int);
int /*<<< orphan*/ printf(char *);
int main(void) {
  assert(isPowerOfFour(16) == true);
  assert(isPowerOfFour(5) == false);
  assert(isPowerOfFour(-2147483648) == false);
  assert(isPowerOfFour(20) == false);
  printf("All passed\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x10,%edi
call   1050 <isPowerOfFour@plt>
cmp    $0x1,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1040 <assert@plt>
mov    $0x5,%edi
call   1050 <isPowerOfFour@plt>
cmp    $0x0,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1040 <assert@plt>
mov    $0x80000000,%edi
call   1050 <isPowerOfFour@plt>
cmp    $0x0,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1040 <assert@plt>
mov    $0x14,%edi
call   1050 <isPowerOfFour@plt>
cmp    $0x0,%eax
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1040 <assert@plt>
lea    0xe52(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
mov    $0x10,%edi
call   1050 <isPowerOfFour@plt>
xor    %edi,%edi
cmp    $0x1,%eax
sete   %dil
call   1040 <assert@plt>
mov    $0x5,%edi
call   1050 <isPowerOfFour@plt>
xor    %edi,%edi
test   %eax,%eax
sete   %dil
call   1040 <assert@plt>
mov    $0x80000000,%edi
call   1050 <isPowerOfFour@plt>
xor    %edi,%edi
test   %eax,%eax
sete   %dil
call   1040 <assert@plt>
mov    $0x14,%edi
call   1050 <isPowerOfFour@plt>
xor    %edi,%edi
test   %eax,%eax
sete   %dil
call   1040 <assert@plt>
lea    0xe6b(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [12 x i8] c"All passed\0A\00"
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 @isPowerOfFour(i32 16)
%3 = icmp eq i32 %2, 1
%4 = zext i1 %3 to i32
%5 = call i32 @assert(i32 %4)
%6 = call i32 @isPowerOfFour(i32 5)
%7 = icmp eq i32 %6, 0
%8 = zext i1 %7 to i32
%9 = call i32 @assert(i32 %8)
%10 = call i32 @isPowerOfFour(i32 -2147483648)
%11 = icmp eq i32 %10, 0
%12 = zext i1 %11 to i32
%13 = call i32 @assert(i32 %12)
%14 = call i32 @isPowerOfFour(i32 20)
%15 = icmp eq i32 %14, 0
%16 = zext i1 %15 to i32
%17 = call i32 @assert(i32 %16)
%18 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@str = [11 x i8] c"All passed\00"
define i32 @main() {
%1 = tail call i32 @isPowerOfFour(i32 16)
%2 = icmp eq i32 %1, 1
%3 = zext i1 %2 to i32
%4 = tail call i32 @assert(i32 %3)
%5 = tail call i32 @isPowerOfFour(i32 5)
%6 = icmp eq i32 %5, 0
%7 = zext i1 %6 to i32
%8 = tail call i32 @assert(i32 %7)
%9 = tail call i32 @isPowerOfFour(i32 -2147483648)
%10 = icmp eq i32 %9, 0
%11 = zext i1 %10 to i32
%12 = tail call i32 @assert(i32 %11)
%13 = tail call i32 @isPowerOfFour(i32 20)
%14 = icmp eq i32 %13, 0
%15 = zext i1 %14 to i32
%16 = tail call i32 @assert(i32 %15)
%17 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
ret i32 0
}