#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;
  int flag = 0;
  printf("intput a year:\n");
  scanf("%d", &year);
  if (year % 4 != 0) {
    flag = 0;
  } else {
    if (year % 100 != 0) {
      flag = 1;
    }
  }
  if (year % 400 == 0) {
    flag = 1;
  }
  if (flag)
    printf("year(%d) is  prime year!", year);
  else
    printf("year(%d) is not prime year!", year);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec5(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    $0x4,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     1174 <main+0x54>
movl   $0x0,-0xc(%rbp)
jmp    1194 <main+0x74>
mov    -0x8(%rbp),%eax
mov    $0x64,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
je     118f <main+0x6f>
movl   $0x1,-0xc(%rbp)
jmp    1194 <main+0x74>
mov    -0x8(%rbp),%eax
mov    $0x190,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    11af <main+0x8f>
movl   $0x1,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
je     11cf <main+0xaf>
mov    -0x8(%rbp),%esi
lea    0xe50(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11e0 <main+0xc0>
mov    -0x8(%rbp),%esi
lea    0xe53(%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
lea    0xf00(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%esi
imul   $0xc28f5c29,%esi,%eax
add    $0x51eb850,%eax
mov    %eax,%ecx
ror    $0x2,%ecx
ror    $0x4,%eax
cmp    $0x28f5c29,%ecx
lea    0xe91(%rip),%rcx
lea    0xea3(%rip),%rdx
mov    %rdx,%rdi
cmovae %rcx,%rdi
test   $0x3,%sil
cmovne %rdx,%rdi
cmp    $0xa3d70b,%eax
cmovb  %rcx,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [16 x i8] c"intput a year:\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [25 x i8] c"year(%d) is prime year!\00"
@.str.3 = [28 x i8] c"year(%d) is not prime year!\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%6 = load i32, i32* %2
%7 = srem i32 %6, 4
%8 = icmp ne i32 %7, 0
br i1 %8, label %9, label %10
9: ; preds = %0
store i32 0, i32* %3
br label %16
10: ; preds = %0
%11 = load i32, i32* %2
%12 = srem i32 %11, 100
%13 = icmp ne i32 %12, 0
br i1 %13, label %14, label %15
14: ; preds = %10
store i32 1, i32* %3
br label %15
15: ; preds = %14, %10
br label %16
16: ; preds = %15, %9
%17 = load i32, i32* %2
%18 = srem i32 %17, 400
%19 = icmp eq i32 %18, 0
br i1 %19, label %20, label %21
20: ; preds = %16
store i32 1, i32* %3
br label %21
21: ; preds = %20, %16
%22 = load i32, i32* %3
%23 = icmp ne i32 %22, 0
br i1 %23, label %24, label %27
24: ; preds = %21
%25 = load i32, i32* %2
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i32 %25)
br label %30
27: ; preds = %21
%28 = load i32, i32* %2
%29 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0), i32 %28)
br label %30
30: ; preds = %27, %24
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [25 x i8] c"year(%d) is prime year!\00"
@.str.3 = [28 x i8] c"year(%d) is not prime year!\00"
@str = [15 x i8] c"intput a year:\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(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 %12, %10
%14 = select i1 %13, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0)
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %14, i32 %5)
ret i32 0
}