#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*/ LOG(char *, char *);
int fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *);
int nightyNight() {
  FILE *fout = fopen("/sys/power/state", "w");
  if (fout == NULL) {
    LOG("Failed to open %s\n", "/sys/power/state");
    return -1;
  }
  fprintf(fout, "mem\n");
  return fclose(fout);
}


x86 assembly (clang, -O0):
<nightyNight>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xeb1(%rip),%rdi
lea    0xebb(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    1189 <nightyNight+0x49>
lea    0xea2(%rip),%rdi
lea    0xe88(%rip),%rsi
call   1050 <LOG@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11a5 <nightyNight+0x65>
mov    -0x10(%rbp),%rdi
lea    0xe92(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<nightyNight>:
push   %rbx
lea    0xeb8(%rip),%rdi
lea    0xec2(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     117e <nightyNight+0x3e>
mov    %rax,%rbx
lea    0xec3(%rip),%rdi
mov    $0x4,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1060 <fwrite@plt>
mov    %rbx,%rdi
pop    %rbx
jmp    1030 <fclose@plt>
lea    0xe8e(%rip),%rdi
lea    0xe74(%rip),%rsi
call   1040 <LOG@plt>
mov    $0xffffffff,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"/sys/power/state\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [19 x i8] c"Failed to open %s\0A\00"
@.str.3 = [5 x i8] c"mem\0A\00"
define i32 @nightyNight() {
%1 = alloca i32
%2 = alloca i32*
%3 = call i32* @fopen(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %3, i32** %2
%4 = load i32*, i32** %2
%5 = icmp eq i32* %4, null
br i1 %5, label %6, label %8
6: ; preds = %0
%7 = call i32 @LOG(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %1
br label %13
8: ; preds = %0
%9 = load i32*, i32** %2
%10 = call i32 @fprintf(i32* %9, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%11 = load i32*, i32** %2
%12 = call i32 @fclose(i32* %11)
store i32 %12, i32* %1
br label %13
13: ; preds = %8, %6
%14 = load i32, i32* %1
ret i32 %14
}

LLVM IR (-O2):
@.str = [17 x i8] c"/sys/power/state\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [19 x i8] c"Failed to open %s\0A\00"
@.str.3 = [5 x i8] c"mem\0A\00"
define i32 @nightyNight() {
%1 = tail call i32* @fopen(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%2 = icmp eq i32* %1, null
br i1 %2, label %3, label %5
3: ; preds = %0
%4 = tail call i32 @LOG(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
br label %8
5: ; preds = %0
%6 = tail call i64 @fwrite(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0), i64 4, i64 1, i32* %1)
%7 = tail call i32 @fclose(i32* %1)
br label %8
8: ; preds = %5, %3
%9 = phi i32 [ -1, %3 ], [ %7, %5 ]
ret i32 %9
}