#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 */
scalar_t__ isleap(unsigned int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, unsigned int *);
int main() {
  unsigned y;
  printf("Enter a year:\n");
  scanf(" %u%*c", &y);
  printf("%u is%s a leap year.", y, isleap(y) ? "" : " not");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xebb(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
call   1030 <isleap@plt>
mov    -0xc(%rbp),%esi
mov    %rax,%rcx
lea    0xeb3(%rip),%rdx
lea    0xe8f(%rip),%rax
cmp    $0x0,%rcx
cmovne %rax,%rdx
lea    0xe88(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed5(%rip),%rdi
call   1030 <puts@plt>
lea    0xea8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%ebx
mov    %ebx,%edi
call   1040 <isleap@plt>
test   %rax,%rax
lea    0xea5(%rip),%rax
lea    0xe9d(%rip),%rdx
cmove  %rax,%rdx
lea    0xe7e(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"Enter a year:\0A\00"
@.str.1 = [7 x i8] c" %u%*c\00"
@.str.2 = [21 x i8] c"%u is%s a leap year.\00"
@.str.3 = [1 x i8] zeroinitializer
@.str.4 = [5 x i8] c" not\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%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 ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%5 = load i32, i32* %2
%6 = load i32, i32* %2
%7 = call i64 @isleap(i32 %6)
%8 = icmp ne i64 %7, 0
%9 = zext i1 %8 to i64
%10 = select i1 %8, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i32 %5, i8* %10)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [7 x i8] c" %u%*c\00"
@.str.2 = [21 x i8] c"%u is%s a leap year.\00"
@.str.3 = [1 x i8] zeroinitializer
@.str.4 = [5 x i8] c" not\00"
@str = [14 x i8] c"Enter 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 ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = call i64 @isleap(i32 %5)
%7 = icmp eq i64 %6, 0
%8 = select i1 %7, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.3, i64 0, i64 0)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i32 %5, i8* %8)
ret i32 0
}