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


x86 assembly (clang, -O0):
<numpal>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x4(%rbp),%eax
mov    %eax,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
je     1181 <numpal+0x61>
mov    -0x8(%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    -0x8(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0x8(%rbp)
jmp    114c <numpal+0x2c>
mov    -0xc(%rbp),%eax
cmp    -0x4(%rbp),%eax
jne    11a3 <numpal+0x83>
mov    -0x4(%rbp),%esi
lea    0xe7f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11b4 <numpal+0x94>
mov    -0x4(%rbp),%esi
lea    0xe7e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<numpal>:
push   %rax
lea    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedd(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%esi
test   %esi,%esi
je     1197 <numpal+0x77>
mov    %esi,%eax
nopw   0x0(%rax,%rax,1)
lea    (%rdx,%rdx,4),%r8d
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,%r8,2),%edx
add    $0x9,%ecx
cmp    $0x12,%ecx
ja     1150 <numpal+0x30>
cmp    %esi,%edx
lea    0xe8c(%rip),%rax
lea    0xe9a(%rip),%rdi
cmove  %rax,%rdi
jmp    119e <numpal+0x7e>
lea    0xe78(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
pop    %rax
ret

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

LLVM IR (-O2):
@.str = [19 x i8] c"Enter an integer: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [21 x i8] c"%d is a palindrome.\0A\00"
@.str.3 = [25 x i8] c"%d is not a palindrome.\0A\00"
define void @numpal() {
%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 %19, label %7
7: ; preds = %0, %7
%8 = phi i32 [ %13, %7 ], [ %5, %0 ]
%9 = phi i32 [ %12, %7 ], [ undef, %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
%17 = icmp eq i32 %12, %5
%18 = select i1 %17, i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0)
br label %19
19: ; preds = %16, %0
%20 = phi i8* [ getelementptr inbounds ([21 x i8], [21 x i8]* @.str.2, i64 0, i64 0), %0 ], [ %18, %16 ]
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) %20, i32 %5)
ret void
}