#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 pid_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);
int getpid();
int creatpidfile() {
  FILE *f;
  pid_t pid;
  char *pidfile = "/var/run/gettyd.pid";
  pid = getpid();
  if ((f = fopen(pidfile, "w")) == NULL) {
    return (-1);
  }
  fprintf(f, "%d\n", pid);
  fclose(f);
  return (0);
}


x86 assembly (clang, -O0):
<creatpidfile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xeb1(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,-0x14(%rbp)
mov    -0x20(%rbp),%rdi
lea    0xeac(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmp    $0x0,%rax
jne    1187 <creatpidfile+0x47>
movl   $0xffffffff,-0x4(%rbp)
jmp    11aa <creatpidfile+0x6a>
mov    -0x10(%rbp),%rdi
mov    -0x14(%rbp),%edx
lea    0xe81(%rip),%rsi
call   1050 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1040 <fclose@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<creatpidfile>:
push   %rbp
push   %r14
push   %rbx
xor    %ebx,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
mov    %eax,%r14d
lea    0xea9(%rip),%rdi
lea    0xeb6(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     1187 <creatpidfile+0x47>
mov    %rax,%rbp
lea    0xea4(%rip),%rsi
mov    %rax,%rdi
mov    %r14d,%edx
call   1050 <fprintf@plt>
mov    %rbp,%rdi
call   1040 <fclose@plt>
jmp    118c <creatpidfile+0x4c>
mov    $0xffffffff,%ebx
mov    %ebx,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [20 x i8] c"/var/run/gettyd.pid\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"%d\0A\00"
define i32 @creatpidfile() {
%1 = alloca i32
%2 = alloca i32*
%3 = alloca i32
%4 = alloca i8*
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8** %4
%5 = call i32 (...) @getpid()
store i32 %5, i32* %3
%6 = load i8*, i8** %4
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %7, i32** %2
%8 = icmp eq i32* %7, null
br i1 %8, label %9, label %10
9: ; preds = %0
store i32 -1, i32* %1
br label %16
10: ; preds = %0
%11 = load i32*, i32** %2
%12 = load i32, i32* %3
%13 = call i32 @fprintf(i32* %11, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %12)
%14 = load i32*, i32** %2
%15 = call i32 @fclose(i32* %14)
store i32 0, i32* %1
br label %16
16: ; preds = %10, %9
%17 = load i32, i32* %1
ret i32 %17
}

LLVM IR (-O2):
@.str = [20 x i8] c"/var/run/gettyd.pid\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [4 x i8] c"%d\0A\00"
define i32 @creatpidfile() {
%1 = tail call i32 (...) @getpid()
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([20 x i8], [20 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 %7, label %4
4: ; preds = %0
%5 = tail call i32 @fprintf(i32* %2, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %1)
%6 = tail call i32 @fclose(i32* %2)
br label %7
7: ; preds = %0, %4
%8 = phi i32 [ 0, %4 ], [ -1, %0 ]
ret i32 %8
}