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

/* Variables and functions */
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *, int /*<<< orphan*/);
int /*<<< orphan*/ system(char *);
void write_wakeup_file(time_t wakeupTime) {
  FILE *wakeupFile;
  wakeupFile = fopen("/var/wakeup", "w");
  if (wakeupFile) {
    fprintf(wakeupFile, "%ld", wakeupTime);
    fclose(wakeupFile);
    system("sync");
  }
}


x86 assembly (clang, -O0):
<write_wakeup_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
lea    0xeae(%rip),%rdi
lea    0xeb3(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     1195 <write_wakeup_file+0x55>
mov    -0x10(%rbp),%rdi
mov    -0x4(%rbp),%edx
lea    0xe93(%rip),%rsi
call   1050 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
lea    0xe82(%rip),%rdi
call   1040 <system@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<write_wakeup_file>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebp
lea    0xeb4(%rip),%rdi
lea    0xeb9(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     118b <write_wakeup_file+0x4b>
mov    %rax,%rbx
lea    0xea7(%rip),%rsi
mov    %rax,%rdi
mov    %ebp,%edx
call   1050 <fprintf@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
lea    0xe92(%rip),%rdi
add    $0x8,%rsp
pop    %rbx
pop    %rbp
jmp    1040 <system@plt>
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [12 x i8] c"/var/wakeup\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"%ld\00"
@.str.3 = [5 x i8] c"sync\00"
define void @write_wakeup_file(i32 %0) {
%2 = alloca i32
%3 = alloca i32*
store i32 %0, i32* %2
%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** %3
%5 = load i32*, i32** %3
%6 = icmp ne i32* %5, null
br i1 %6, label %7, label %14
7: ; preds = %1
%8 = load i32*, i32** %3
%9 = load i32, i32* %2
%10 = call i32 @fprintf(i32* %8, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %9)
%11 = load i32*, i32** %3
%12 = call i32 @fclose(i32* %11)
%13 = call i32 @system(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
br label %14
14: ; preds = %7, %1
ret void
}

LLVM IR (-O2):
@.str = [12 x i8] c"/var/wakeup\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"%ld\00"
@.str.3 = [5 x i8] c"sync\00"
define void @write_wakeup_file(i32 %0) {
%2 = 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))
%3 = icmp eq i32* %2, null
br i1 %3, label %8, label %4
4: ; preds = %1
%5 = tail call i32 @fprintf(i32* %2, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %0)
%6 = tail call i32 @fclose(i32* %2)
%7 = tail call i32 @system(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
br label %8
8: ; preds = %4, %1
ret void
}