#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() {
  int year = 0;
  printf("Enter a year: ");
  scanf("%d", &year);
  if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
    printf("\n%d IS a leap year.\n", year);
  else
    printf("\n%d IS NOT a leap year.\n", year);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec4(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0x4,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    117c <main+0x5c>
mov    -0x8(%rbp),%eax
mov    $0x64,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1190 <main+0x70>
mov    -0x8(%rbp),%eax
mov    $0x190,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11a6 <main+0x86>
mov    -0x8(%rbp),%esi
lea    0xe78(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11b7 <main+0x97>
mov    -0x8(%rbp),%esi
lea    0xe77(%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
movl   $0x0,0x4(%rsp)
lea    0xed0(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%esi
imul   $0xc28f5c29,%esi,%eax
add    $0x51eb850,%eax
mov    %eax,%ecx
ror    $0x2,%ecx
ror    $0x4,%eax
cmp    $0xa3d70b,%eax
lea    0xea7(%rip),%rdi
lea    0xeb5(%rip),%rax
cmovb  %rdi,%rax
cmp    $0x28f5c29,%ecx
cmovb  %rax,%rdi
test   $0x3,%sil
cmovne %rax,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"Enter a year: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [21 x i8] c"\0A%d IS a leap year.\0A\00"
@.str.3 = [25 x i8] c"\0A%d IS NOT a leap year.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 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 = srem i32 %5, 4
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %12
8: ; preds = %0
%9 = load i32, i32* %2
%10 = srem i32 %9, 100
%11 = icmp ne i32 %10, 0
br i1 %11, label %16, label %12
12: ; preds = %8, %0
%13 = load i32, i32* %2
%14 = srem i32 %13, 400
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %19
16: ; preds = %12, %8
%17 = load i32, i32* %2
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i32 %17)
br label %22
19: ; preds = %12
%20 = load i32, i32* %2
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0), i32 %20)
br label %22
22: ; preds = %19, %16
ret i32 0
}

LLVM IR (-O2):
@.str = [15 x i8] c"Enter a year: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [21 x i8] c"\0A%d IS a leap year.\0A\00"
@.str.3 = [25 x i8] c"\0A%d IS NOT a leap year.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 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 = and i32 %5, 3
%7 = icmp eq i32 %6, 0
%8 = srem i32 %5, 100
%9 = icmp ne i32 %8, 0
%10 = and i1 %7, %9
%11 = srem i32 %5, 400
%12 = icmp eq i32 %11, 0
%13 = or i1 %10, %12
%14 = select i1 %13, i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0)
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %14, i32 %5)
ret i32 0
}