#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;
  printf("Enter year: \n");
  scanf("%d", &year);
  if (year % 4 == 0) {
    if (year % 100 == 0) {
      if (year % 400 == 0) {
        printf("It is a leap year\n");
      } else {
        printf("It is not a leap year\n");
      }
    } else {
      printf("It is a leap year\n");
    }
  } else {
    printf("It is not a leap year \n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xecc(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0x4,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11ba <main+0x9a>
mov    -0x8(%rbp),%eax
mov    $0x64,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11a9 <main+0x89>
mov    -0x8(%rbp),%eax
mov    $0x190,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1198 <main+0x78>
lea    0xe83(%rip),%rdi
call   1030 <printf@plt>
jmp    11a4 <main+0x84>
lea    0xe85(%rip),%rdi
call   1030 <printf@plt>
jmp    11b5 <main+0x95>
lea    0xe61(%rip),%rdi
call   1030 <printf@plt>
jmp    11c6 <main+0xa6>
lea    0xe7a(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xedb(%rip),%rdi
call   1030 <puts@plt>
lea    0xecc(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%eax
test   $0x3,%al
je     114f <main+0x2f>
lea    0xec3(%rip),%rdi
jmp    118a <main+0x6a>
imul   $0xc28f5c29,%eax,%eax
add    $0x51eb850,%eax
mov    %eax,%ecx
ror    $0x2,%ecx
cmp    $0x28f5c28,%ecx
jbe    1170 <main+0x50>
lea    0xecf(%rip),%rdi
jmp    118a <main+0x6a>
ror    $0x4,%eax
cmp    $0xa3d70b,%eax
lea    0xebe(%rip),%rax
lea    0xea1(%rip),%rdi
cmovb  %rax,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [14 x i8] c"Enter year: \0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [19 x i8] c"It is a leap year\0A\00"
@.str.3 = [23 x i8] c"It is not a leap year\0A\00"
@.str.4 = [24 x i8] c"It is not a leap year \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 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 %24
8: ; preds = %0
%9 = load i32, i32* %2
%10 = srem i32 %9, 100
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %21
12: ; preds = %8
%13 = load i32, i32* %2
%14 = srem i32 %13, 400
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %18
16: ; preds = %12
%17 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
br label %20
18: ; preds = %12
%19 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0))
br label %20
20: ; preds = %18, %16
br label %23
21: ; preds = %8
%22 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0))
br label %23
23: ; preds = %21, %20
br label %26
24: ; preds = %0
%25 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.4, i64 0, i64 0))
br label %26
26: ; preds = %24, %23
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@str = [13 x i8] c"Enter year: \00"
@str.5 = [23 x i8] c"It is not a leap year \00"
@str.7 = [22 x i8] c"It is not a leap year\00"
@str.8 = [18 x i8] c"It is a leap year\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 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
br i1 %7, label %8, label %15
8: ; preds = %0
%9 = srem i32 %5, 100
%10 = icmp eq i32 %9, 0
br i1 %10, label %11, label %15
11: ; preds = %8
%12 = srem i32 %5, 400
%13 = icmp eq i32 %12, 0
%14 = select i1 %13, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @str.8, i64 0, i64 0), i8* getelementptr inbounds ([22 x i8], [22 x i8]* @str.7, i64 0, i64 0)
br label %15
15: ; preds = %0, %8, %11
%16 = phi i8* [ %14, %11 ], [ getelementptr inbounds ([18 x i8], [18 x i8]* @str.8, i64 0, i64 0), %8 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str.5, i64 0, i64 0), %0 ]
%17 = call i32 @puts(i8* dereferenceable(1) %16)
ret i32 0
}