#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*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *, char *);
int /*<<< orphan*/ printf(char *, ...);
void set_log(char *mensagem) {
  FILE *log_file = fopen("log.txt", "a");
  if (log_file == NULL) {
    printf("Error opening log file!\n");
    exit(1);
  }
  fprintf(log_file, "%s\n", mensagem);
  printf("log : %s\n", mensagem);
  fclose(log_file);
  log_file = NULL;
}


x86 assembly (clang, -O0):
<set_log>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xe9d(%rip),%rdi
lea    0xe9e(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    1196 <set_log+0x46>
lea    0xe85(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%rdx
lea    0xe84(%rip),%rsi
call   1050 <fprintf@plt>
mov    -0x8(%rbp),%rsi
lea    0xe6e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
movq   $0x0,-0x10(%rbp)
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<set_log>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xe92(%rip),%rdi
lea    0xe93(%rip),%rsi
call   1070 <fopen@plt>
test   %rax,%rax
je     11b4 <set_log+0x54>
mov    %rax,%rbx
lea    0xe87(%rip),%rsi
mov    %rax,%rdi
mov    %r14,%rdx
call   1060 <fprintf@plt>
lea    0xe6f(%rip),%rdi
mov    %r14,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1040 <fclose@plt>
lea    0xe59(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1080 <exit@plt>

LLVM IR (-O0):
@.str = [8 x i8] c"log.txt\00"
@.str.1 = [2 x i8] c"a\00"
@.str.2 = [25 x i8] c"Error opening log file!\0A\00"
@.str.3 = [4 x i8] c"%s\0A\00"
@.str.4 = [10 x i8] c"log : %s\0A\00"
define void @set_log(i8* %0) {
%2 = alloca i8*
%3 = alloca i32*
store i8* %0, i8** %2
%4 = call i32* @fopen(i8* getelementptr inbounds ([8 x i8], [8 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** %3
%5 = load i32*, i32** %3
%6 = icmp eq i32* %5, null
br i1 %6, label %7, label %10
7: ; preds = %1
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @exit(i32 1)
unreachable
10: ; preds = %1
%11 = load i32*, i32** %3
%12 = load i8*, i8** %2
%13 = call i32 @fprintf(i32* %11, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8* %12)
%14 = load i8*, i8** %2
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i8* %14)
%16 = load i32*, i32** %3
%17 = call i32 @fclose(i32* %16)
store i32* null, i32** %3
ret void
}

LLVM IR (-O2):
@.str = [8 x i8] c"log.txt\00"
@.str.1 = [2 x i8] c"a\00"
@.str.3 = [4 x i8] c"%s\0A\00"
@.str.4 = [10 x i8] c"log : %s\0A\00"
@str = [24 x i8] c"Error opening log file!\00"
define void @set_log(i8* %0) {
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %4, label %7
4: ; preds = %1
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @str, i64 0, i64 0))
%6 = tail call i32 @exit(i32 1)
unreachable
7: ; preds = %1
%8 = tail call i32 @fprintf(i32* %2, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8* %0)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @.str.4, i64 0, i64 0), i8* %0)
%10 = tail call i32 @fclose(i32* %2)
ret void
}