#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 m, reverse = 0, rem, temp;
  printf("Enter an integer: ");
  scanf("%d", &m);
  temp = m;
  while (temp != 0) {
    rem = temp % 10;
    reverse = reverse * 10 + rem;
    temp /= 10;
  }
  if (reverse == m)
    printf("%d is a palindrome.", m);
  else
    printf("%d is not a palindrome.", m);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
lea    0xec3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec8(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
cmpl   $0x0,-0x14(%rbp)
je     118f <main+0x6f>
mov    -0x14(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %edx,-0x10(%rbp)
imul   $0xa,-0xc(%rbp),%eax
add    -0x10(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    -0x14(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x14(%rbp)
jmp    115a <main+0x3a>
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jne    11b1 <main+0x91>
mov    -0x8(%rbp),%esi
lea    0xe71(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11c2 <main+0xa2>
mov    -0x8(%rbp),%esi
lea    0xe6f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed7(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
mov    0xc(%rsp),%esi
test   %esi,%esi
je     118f <main+0x6f>
xor    %ebx,%ebx
mov    %esi,%eax
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
lea    (%rbx,%rbx,4),%ebx
movslq %eax,%rcx
imul   $0x66666667,%rcx,%rax
mov    %rax,%rdi
shr    $0x3f,%rdi
sar    $0x22,%rax
add    %edi,%eax
lea    (%rax,%rax,1),%edi
lea    (%rdi,%rdi,4),%edi
mov    %ecx,%edx
sub    %edi,%edx
lea    (%rdx,%rbx,2),%ebx
add    $0x9,%ecx
cmp    $0x12,%ecx
ja     1160 <main+0x40>
cmp    %esi,%ebx
lea    0xe7e(%rip),%rax
lea    0xe8b(%rip),%rdi
cmove  %rax,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"Enter an integer: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"%d is a palindrome.\00"
@.str.3 = [24 x i8] c"%d is not a palindrome.\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* %3
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 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* %5
br label %9
9: ; preds = %12, %0
%10 = load i32, i32* %5
%11 = icmp ne i32 %10, 0
br i1 %11, label %12, label %21
12: ; preds = %9
%13 = load i32, i32* %5
%14 = srem i32 %13, 10
store i32 %14, i32* %4
%15 = load i32, i32* %3
%16 = mul nsw i32 %15, 10
%17 = load i32, i32* %4
%18 = add nsw i32 %16, %17
store i32 %18, i32* %3
%19 = load i32, i32* %5
%20 = sdiv i32 %19, 10
store i32 %20, i32* %5
br label %9
21: ; preds = %9
%22 = load i32, i32* %3
%23 = load i32, i32* %2
%24 = icmp eq i32 %22, %23
br i1 %24, label %25, label %28
25: ; preds = %21
%26 = load i32, i32* %2
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %26)
br label %31
28: ; preds = %21
%29 = load i32, i32* %2
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0), i32 %29)
br label %31
31: ; preds = %28, %25
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"Enter an integer: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [20 x i8] c"%d is a palindrome.\00"
@.str.3 = [24 x i8] c"%d is not a palindrome.\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 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 ], [ %5, %0 ]
%9 = phi i32 [ %12, %7 ], [ 0, %0 ]
%10 = srem i32 %8, 10
%11 = mul nsw i32 %9, 10
%12 = add nsw i32 %10, %11
%13 = sdiv i32 %8, 10
%14 = add i32 %8, 9
%15 = icmp ult i32 %14, 19
br i1 %15, label %16, label %7
16: ; preds = %7, %0
%17 = phi i32 [ 0, %0 ], [ %12, %7 ]
%18 = icmp eq i32 %17, %5
%19 = select i1 %18, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0)
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %19, i32 %5)
ret i32 0
}