#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 y;
  printf("please input an year :");
  scanf("%d", &y);
  if (y % 400 == 0)
    printf("This year is leap year.\n");
  else if (y % 4 == 0 && y % 100 != 0)
    printf("This year is leap year.\n");
  else
    printf("This year is not 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    0xed5(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0x190,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1170 <main+0x50>
lea    0xeb4(%rip),%rdi
call   1030 <printf@plt>
jmp    11ba <main+0x9a>
mov    -0x8(%rbp),%eax
mov    $0x4,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11a9 <main+0x89>
mov    -0x8(%rbp),%eax
mov    $0x64,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     11a9 <main+0x89>
lea    0xe7b(%rip),%rdi
call   1030 <printf@plt>
jmp    11b5 <main+0x95>
lea    0xe83(%rip),%rdi
call   1030 <printf@plt>
jmp    11ba <main+0x9a>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
lea    0xed3(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%eax
imul   $0xc28f5c29,%eax,%ecx
add    $0x51eb850,%ecx
mov    %ecx,%edx
ror    $0x4,%edx
cmp    $0xa3d70b,%edx
jb     118e <main+0x5e>
ror    $0x2,%ecx
cmp    $0x28f5c29,%ecx
lea    0xe9f(%rip),%rcx
lea    0xeb4(%rip),%rdi
cmovb  %rcx,%rdi
test   $0x3,%al
cmovne %rcx,%rdi
jmp    1195 <main+0x65>
lea    0xea1(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [23 x i8] c"please input an year :\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [25 x i8] c"This year is leap year.\0A\00"
@.str.3 = [29 x i8] c"This year is not 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 ([23 x i8], [23 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, 400
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %10
8: ; preds = %0
%9 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0))
br label %23
10: ; preds = %0
%11 = load i32, i32* %2
%12 = srem i32 %11, 4
%13 = icmp eq i32 %12, 0
br i1 %13, label %14, label %20
14: ; preds = %10
%15 = load i32, i32* %2
%16 = srem i32 %15, 100
%17 = icmp ne i32 %16, 0
br i1 %17, label %18, label %20
18: ; preds = %14
%19 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0))
br label %22
20: ; preds = %14, %10
%21 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0))
br label %22
22: ; preds = %20, %18
br label %23
23: ; preds = %22, %8
ret i32 0
}

LLVM IR (-O2):
@.str = [23 x i8] c"please input an year :\00"
@.str.1 = [3 x i8] c"%d\00"
@str = [28 x i8] c"This year is not leap year.\00"
@str.5 = [24 x i8] c"This year is leap year.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 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 = srem i32 %5, 400
%7 = icmp eq i32 %6, 0
br i1 %7, label %15, label %8
8: ; preds = %0
%9 = and i32 %5, 3
%10 = icmp ne i32 %9, 0
%11 = srem i32 %5, 100
%12 = icmp eq i32 %11, 0
%13 = or i1 %10, %12
%14 = select i1 %13, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @str, i64 0, i64 0), i8* getelementptr inbounds ([24 x i8], [24 x i8]* @str.5, i64 0, i64 0)
br label %15
15: ; preds = %8, %0
%16 = phi i8* [ getelementptr inbounds ([24 x i8], [24 x i8]* @str.5, i64 0, i64 0), %0 ], [ %14, %8 ]
%17 = call i32 @puts(i8* dereferenceable(1) %16)
ret i32 0
}