#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 num, aux, reverso;
  printf("Digite um inteiro positivo: ");
  scanf("%d", &num);
  aux = num;
  reverso = 0;
  while (aux != 0) {
    reverso = reverso * 10 + aux % 10;
    aux = aux / 10;
  }
  if (reverso == num)
    printf("O numero %d e um numero palindromo \n", num);
  else
    printf("O numero %d nao e um numero palindromo \n", reverso);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed9(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
cmpl   $0x0,-0xc(%rbp)
je     1191 <main+0x71>
imul   $0xa,-0x10(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    -0x14(%rbp),%eax
add    %edx,%eax
mov    %eax,-0x10(%rbp)
mov    -0xc(%rbp),%eax
mov    $0xa,%ecx
cltd
idiv   %ecx
mov    %eax,-0xc(%rbp)
jmp    115a <main+0x3a>
mov    -0x10(%rbp),%eax
cmp    -0x8(%rbp),%eax
jne    11b3 <main+0x93>
mov    -0x8(%rbp),%esi
lea    0xe79(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11c4 <main+0xa4>
mov    -0x10(%rbp),%esi
lea    0xe88(%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    0xee1(%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
jne    119c <main+0x7c>
lea    0xe86(%rip),%rdi
jmp    11a5 <main+0x85>
lea    0xea2(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [29 x i8] c"Digite um inteiro positivo: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [37 x i8] c"O numero %d e um numero palindromo \0A\00"
@.str.3 = [41 x i8] c"O numero %d nao e um numero palindromo \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 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* %2)
%7 = load i32, i32* %2
store i32 %7, i32* %3
store i32 0, i32* %4
br label %8
8: ; preds = %11, %0
%9 = load i32, i32* %3
%10 = icmp ne i32 %9, 0
br i1 %10, label %11, label %19
11: ; preds = %8
%12 = load i32, i32* %4
%13 = mul nsw i32 %12, 10
%14 = load i32, i32* %3
%15 = srem i32 %14, 10
%16 = add nsw i32 %13, %15
store i32 %16, i32* %4
%17 = load i32, i32* %3
%18 = sdiv i32 %17, 10
store i32 %18, i32* %3
br label %8
19: ; preds = %8
%20 = load i32, i32* %4
%21 = load i32, i32* %2
%22 = icmp eq i32 %20, %21
br i1 %22, label %23, label %26
23: ; preds = %19
%24 = load i32, i32* %2
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i32 %24)
br label %29
26: ; preds = %19
%27 = load i32, i32* %4
%28 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.3, i64 0, i64 0), i32 %27)
br label %29
29: ; preds = %26, %23
ret i32 0
}

LLVM IR (-O2):
@.str = [29 x i8] c"Digite um inteiro positivo: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [37 x i8] c"O numero %d e um numero palindromo \0A\00"
@.str.3 = [41 x i8] c"O numero %d nao e um numero palindromo \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 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 [ %12, %7 ], [ 0, %0 ]
%9 = phi i32 [ %13, %7 ], [ %5, %0 ]
%10 = mul nsw i32 %8, 10
%11 = srem i32 %9, 10
%12 = add nsw i32 %10, %11
%13 = sdiv i32 %9, 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 ], [ %12, %7 ]
%18 = icmp eq i32 %17, %5
br i1 %18, label %19, label %21
19: ; preds = %16
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i32 %5)
br label %23
21: ; preds = %16
%22 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([41 x i8], [41 x i8]* @.str.3, i64 0, i64 0), i32 %17)
br label %23
23: ; preds = %21, %19
ret i32 0
}