#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ feof(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fscanf(int /*<<< orphan*/ *, char *, int *);
int /*<<< orphan*/ printf(char *, int);
int main(void) {
  FILE *arquivo;
  int n;
  arquivo = fopen("entrada.txt", "r");
  while (!feof(arquivo)) {
    fscanf(arquivo, "%d", &n);
    printf("\nO número lido foi %d\n\n", n);
    n = -1;
  }
  fclose(arquivo);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
lea    0xe9f(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1060 <feof@plt>
cmp    $0x0,%eax
setne  %al
xor    $0xff,%al
test   $0x1,%al
jne    1194 <main+0x44>
jmp    11c3 <main+0x73>
mov    -0x10(%rbp),%rdi
lea    0xe6f(%rip),%rsi
lea    -0x14(%rbp),%rdx
call   1050 <fscanf@plt>
mov    -0x14(%rbp),%esi
lea    0xe5f(%rip),%rdi
call   1040 <printf@plt>
movl   $0xffffffff,-0x14(%rbp)
jmp    1176 <main+0x26>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xea1(%rip),%rdi
lea    0xea6(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,%rbx
mov    %rax,%rdi
call   1060 <feof@plt>
test   %eax,%eax
jne    11be <main+0x6e>
lea    0xe8d(%rip),%r14
lea    0x4(%rsp),%r15
lea    0xe84(%rip),%r12
nopl   (%rax)
mov    %rbx,%rdi
mov    %r14,%rsi
mov    %r15,%rdx
call   1050 <fscanf@plt>
mov    0x4(%rsp),%esi
mov    %r12,%rdi
call   1040 <printf@plt>
movl   $0xffffffff,0x4(%rsp)
ff
mov    %rbx,%rdi
call   1060 <feof@plt>
test   %eax,%eax
je     1190 <main+0x40>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [12 x i8] c"entrada.txt\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [25 x i8] c"\0AO n\C3\BAmero lido foi %d\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32*
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32* @fopen(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %4, i32** %2
br label %5
5: ; preds = %10, %0
%6 = load i32*, i32** %2
%7 = call i32 @feof(i32* %6)
%8 = icmp ne i32 %7, 0
%9 = xor i1 %8, true
br i1 %9, label %10, label %15
10: ; preds = %5
%11 = load i32*, i32** %2
%12 = call i32 @fscanf(i32* %11, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
%13 = load i32, i32* %3
%14 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0), i32 %13)
store i32 -1, i32* %3
br label %5
15: ; preds = %5
%16 = load i32*, i32** %2
%17 = call i32 @fclose(i32* %16)
ret i32 0
}

LLVM IR (-O2):
@.str = [12 x i8] c"entrada.txt\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [25 x i8] c"\0AO n\C3\BAmero lido foi %d\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32* @fopen(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @feof(i32* %3)
%5 = icmp eq i32 %4, 0
br i1 %5, label %6, label %12
6: ; preds = %0, %6
%7 = call i32 @fscanf(i32* %3, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%8 = load i32, i32* %1
%9 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.3, i64 0, i64 0), i32 %8)
store i32 -1, i32* %1
%10 = call i32 @feof(i32* %3)
%11 = icmp eq i32 %10, 0
br i1 %11, label %6, label %12
12: ; preds = %6, %0
%13 = call i32 @fclose(i32* %3)
ret i32 0
}