#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(void) {
  int nro, x, z = 1;
  while (z != 0) {
    printf("Digite um numero diferente de zero: ");
    scanf("%d", &x);
    printf("%d\n", x * x);
    if (x == 0) {
      z = 0;
      printf("Numero invalido");
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x10(%rbp)
cmpl   $0x0,-0x10(%rbp)
je     1197 <main+0x77>
lea    0xeb9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed0(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0xc(%rbp),%esi
imul   -0xc(%rbp),%esi
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
cmpl   $0x0,-0xc(%rbp)
jne    1192 <main+0x72>
movl   $0x0,-0x10(%rbp)
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1136 <main+0x16>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xed1(%rip),%r14
lea    0xeef(%rip),%r15
lea    0x4(%rsp),%r12
lea    0xee6(%rip),%rbx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %r14,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %r12,%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%esi
imul   %esi,%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
cmpl   $0x0,0x4(%rsp)
jne    1150 <main+0x30>
lea    0xea8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [37 x i8] c"Digite um numero diferente de zero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\0A\00"
@.str.3 = [16 x i8] c"Numero invalido\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %4
br label %5
5: ; preds = %19, %0
%6 = load i32, i32* %4
%7 = icmp ne i32 %6, 0
br i1 %7, label %8, label %20
8: ; preds = %5
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%11 = load i32, i32* %3
%12 = load i32, i32* %3
%13 = mul nsw i32 %11, %12
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %13)
%15 = load i32, i32* %3
%16 = icmp eq i32 %15, 0
br i1 %16, label %17, label %19
17: ; preds = %8
store i32 0, i32* %4
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
br label %19
19: ; preds = %17, %8
br label %5
20: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
@.str = [37 x i8] c"Digite um numero diferente de zero: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d\0A\00"
@.str.3 = [16 x i8] c"Numero invalido\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %3, %0
%4 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%6 = load i32, i32* %1
%7 = mul nsw i32 %6, %6
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %7)
%9 = load i32, i32* %1
%10 = icmp eq i32 %9, 0
br i1 %10, label %11, label %3
11: ; preds = %3
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}