#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 n, rem, temp, rev = 0;
  printf("\nEnter a number: ");
  scanf("%d", &n);
  temp = n;
  while (temp != 0) {
    rem = temp % 10;
    temp = temp / 10;
    rev = (rev * 10) + rem;
  }
  if (rev != n) {
    printf("\nEntered number is not palindrome.\n");
  } else {
    printf("\nEntered number is palindrome.\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x14(%rbp)
lea    0xec3(%rip),%rdi
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
cmpl   $0x0,-0x10(%rbp)
je     118d <main+0x6d>
mov    -0x10(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0xc(%rbp)
mov    -0x10(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x10(%rbp)
imul   $0xa,-0x14(%rbp),%eax
add    -0xc(%rbp),%eax
mov    %eax,-0x14(%rbp)
jmp    1158 <main+0x38>
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
je     11aa <main+0x8a>
lea    0xe75(%rip),%rdi
call   1030 <printf@plt>
jmp    11b6 <main+0x96>
lea    0xe88(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
lea    0xece(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
mov    0x4(%rsp),%r8d
xor    %ecx,%ecx
test   %r8d,%r8d
je     118f <main+0x5f>
mov    %r8d,%edx
nopl   (%rax)
movslq %edx,%rax
imul   $0x66666667,%rax,%rdx
mov    %rdx,%rdi
shr    $0x3f,%rdi
sar    $0x22,%rdx
add    %edi,%edx
lea    (%rdx,%rdx,1),%edi
lea    (%rdi,%rdi,4),%edi
mov    %eax,%esi
sub    %edi,%esi
lea    (%rcx,%rcx,4),%ecx
lea    (%rsi,%rcx,2),%ecx
add    $0x9,%eax
cmp    $0x12,%eax
ja     1160 <main+0x30>
cmp    %r8d,%ecx
lea    0xe7c(%rip),%rax
lea    0xe94(%rip),%rdi
cmove  %rax,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [18 x i8] c"\0AEnter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [36 x i8] c"\0AEntered number is not palindrome.\0A\00"
@.str.3 = [32 x i8] c"\0AEntered number is palindrome.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %5
%6 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%8 = load i32, i32* %2
store i32 %8, i32* %4
br label %9
9: ; preds = %12, %0
%10 = load i32, i32* %4
%11 = icmp ne i32 %10, 0
br i1 %11, label %12, label %21
12: ; preds = %9
%13 = load i32, i32* %4
%14 = srem i32 %13, 10
store i32 %14, i32* %3
%15 = load i32, i32* %4
%16 = sdiv i32 %15, 10
store i32 %16, i32* %4
%17 = load i32, i32* %5
%18 = mul nsw i32 %17, 10
%19 = load i32, i32* %3
%20 = add nsw i32 %18, %19
store i32 %20, i32* %5
br label %9
21: ; preds = %9
%22 = load i32, i32* %5
%23 = load i32, i32* %2
%24 = icmp ne i32 %22, %23
br i1 %24, label %25, label %27
25: ; preds = %21
%26 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0))
br label %29
27: ; preds = %21
%28 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.3, i64 0, i64 0))
br label %29
29: ; preds = %27, %25
ret i32 0
}

LLVM IR (-O2):
@.str = [18 x i8] c"\0AEnter a number: \00"
@.str.1 = [3 x i8] c"%d\00"
@str = [31 x i8] c"\0AEntered number is palindrome.\00"
@str.4 = [35 x i8] c"\0AEntered number is not palindrome.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 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 = icmp eq i32 %5, 0
br i1 %6, label %16, label %7
7: ; preds = %0, %7
%8 = phi i32 [ %13, %7 ], [ 0, %0 ]
%9 = phi i32 [ %11, %7 ], [ %5, %0 ]
%10 = srem i32 %9, 10
%11 = sdiv i32 %9, 10
%12 = mul nsw i32 %8, 10
%13 = add nsw i32 %12, %10
%14 = add i32 %9, 9
%15 = icmp ult i32 %14, 19
br i1 %15, label %16, label %7
16: ; preds = %7, %0
%17 = phi i32 [ 0, %0 ], [ %13, %7 ]
%18 = icmp eq i32 %17, %5
%19 = select i1 %18, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @str, i64 0, i64 0), i8* getelementptr inbounds ([35 x i8], [35 x i8]* @str.4, i64 0, i64 0)
%20 = call i32 @puts(i8* dereferenceable(1) %19)
ret i32 0
}