#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 */
unsigned int even_bit_toggle(unsigned int);
unsigned int odd_bit_toggle(unsigned int);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, unsigned int *);
int /*<<< orphan*/ showbits(unsigned int);
int main() {
  unsigned int num;
  printf("Enter a number:");
  scanf("%d", &num);
  showbits(num);
  printf("Number after toggling even bits:\n");
  showbits(even_bit_toggle(num));
  printf("\nNumber after toggling odd bits:\n");
  showbits(odd_bit_toggle(num));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
call   1040 <printf@plt>
lea    0xe9e(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
mov    -0x8(%rbp),%edi
call   1030 <showbits@plt>
lea    0xe89(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
call   1070 <even_bit_toggle@plt>
mov    %eax,%edi
call   1030 <showbits@plt>
lea    0xe90(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%edi
call   1050 <odd_bit_toggle@plt>
mov    %eax,%edi
call   1030 <showbits@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xe98(%rip),%rdi
call   1050 <printf@plt>
lea    0xe9c(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1070 <scanf@plt>
mov    0x4(%rsp),%edi
call   1040 <showbits@plt>
lea    0xe85(%rip),%rdi
call   1030 <puts@plt>
mov    0x4(%rsp),%edi
call   1080 <even_bit_toggle@plt>
mov    %eax,%edi
call   1040 <showbits@plt>
lea    0xe8a(%rip),%rdi
call   1030 <puts@plt>
mov    0x4(%rsp),%edi
call   1060 <odd_bit_toggle@plt>
mov    %eax,%edi
call   1040 <showbits@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [16 x i8] c"Enter a number:\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [34 x i8] c"Number after toggling even bits:\0A\00"
@.str.3 = [34 x i8] c"\0ANumber after toggling odd bits:\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 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 i32 @showbits(i32 %5)
%7 = call i32 @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* %2
%9 = call i32 @even_bit_toggle(i32 %8)
%10 = call i32 @showbits(i32 %9)
%11 = call i32 @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0))
%12 = load i32, i32* %2
%13 = call i32 @odd_bit_toggle(i32 %12)
%14 = call i32 @showbits(i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [16 x i8] c"Enter a number:\00"
@.str.1 = [3 x i8] c"%d\00"
@str = [33 x i8] c"Number after toggling even bits:\00"
@str.4 = [33 x i8] c"\0ANumber after toggling odd bits:\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 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 i32 @showbits(i32 %5)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @str, i64 0, i64 0))
%8 = load i32, i32* %1
%9 = call i32 @even_bit_toggle(i32 %8)
%10 = call i32 @showbits(i32 %9)
%11 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @str.4, i64 0, i64 0))
%12 = load i32, i32* %1
%13 = call i32 @odd_bit_toggle(i32 %12)
%14 = call i32 @showbits(i32 %13)
ret i32 0
}