#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 */
typedef struct TYPE_2__ TYPE_1__;

/* Type definitions */
struct TYPE_2__ {
  int /*<<< orphan*/ s_addr;
};
struct sockaddr_in {
  TYPE_1__ sin_addr;
  int /*<<< orphan*/ sin_port;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int /*<<< orphan*/ server;
typedef int /*<<< orphan*/ arg;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ INADDR_ANY;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ SOL_SOCKET;
int /*<<< orphan*/ SO_REUSEADDR;
int /*<<< orphan*/ SystemFatal(char *);
int bind(int, struct sockaddr *, int);
int /*<<< orphan*/ bzero(char *, int);
int /*<<< orphan*/ htonl(int /*<<< orphan*/);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ perror(char *);
int setsockopt(int, int /*<<< orphan*/, int /*<<< orphan*/, int *, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int createSocket() {
  int sd, port, arg;
  struct sockaddr_in server;
  port = 7000;
  if ((sd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
    perror("Can't create a socket");
    return (-1);
  }
  arg = 1;
  if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) == -1) {
    SystemFatal("setsockopt");
  }
  bzero((char *)&server, sizeof(struct sockaddr_in));
  server.sin_family = AF_INET;
  server.sin_port = htons(port);
  server.sin_addr.s_addr = htonl(INADDR_ANY);
  if (bind(sd, (struct sockaddr *)&server, sizeof(server)) == -1) {
    perror("Can't bind name to socket");
    return (-1);
  }
  return sd;
}


x86 assembly (clang, -O0):
<createSocket>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x1b58,-0xc(%rbp)
mov    0x2e4a(%rip),%rax
mov    (%rax),%edi
mov    0x2e29(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10a0 <socket@plt>
mov    %eax,-0x8(%rbp)
cmp    $0xffffffff,%eax
jne    11cc <createSocket+0x4c>
lea    0xe45(%rip),%rdi
call   1080 <perror@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    127a <createSocket+0xfa>
movl   $0x1,-0x10(%rbp)
mov    -0x8(%rbp),%edi
mov    0x2e0b(%rip),%rax
mov    (%rax),%esi
mov    0x2dda(%rip),%rax
mov    (%rax),%edx
lea    -0x10(%rbp),%rcx
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
cmp    $0xffffffff,%eax
jne    120c <createSocket+0x8c>
lea    0xe0f(%rip),%rdi
call   1070 <SystemFatal@plt>
lea    -0x20(%rbp),%rdi
mov    $0xc,%esi
call   1090 <bzero@plt>
mov    0x2dbf(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0xc(%rbp),%edi
call   1040 <htons@plt>
mov    %eax,-0x1c(%rbp)
mov    0x2da0(%rip),%rax
mov    (%rax),%edi
call   1050 <htonl@plt>
mov    %eax,-0x20(%rbp)
mov    -0x8(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1060 <bind@plt>
cmp    $0xffffffff,%eax
jne    1274 <createSocket+0xf4>
lea    0xdbe(%rip),%rdi
call   1080 <perror@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    127a <createSocket+0xfa>
mov    -0x8(%rbp),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<createSocket>:
push   %r15
push   %r14
push   %rbx
sub    $0x20,%rsp
mov    0x2e50(%rip),%r15
mov    (%r15),%edi
mov    0x2e2e(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10a0 <socket@plt>
cmp    $0xffffffff,%eax
je     1244 <createSocket+0xc4>
mov    %eax,%ebx
movl   $0x1,0xc(%rsp)
mov    0x2e2b(%rip),%rax
mov    (%rax),%esi
mov    0x2dfa(%rip),%rax
mov    (%rax),%edx
lea    0xc(%rsp),%rcx
mov    %ebx,%edi
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
cmp    $0xffffffff,%eax
jne    11eb <createSocket+0x6b>
lea    0xe30(%rip),%rdi
call   1070 <SystemFatal@plt>
lea    0x10(%rsp),%r14
mov    %r14,%rdi
mov    $0xc,%esi
call   1090 <bzero@plt>
mov    (%r15),%eax
mov    %eax,0x18(%rsp)
mov    $0x1b58,%edi
call   1040 <htons@plt>
mov    %eax,0x14(%rsp)
mov    0x2dbf(%rip),%rax
mov    (%rax),%edi
call   1050 <htonl@plt>
mov    %eax,0x10(%rsp)
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   1060 <bind@plt>
cmp    $0xffffffff,%eax
je     124d <createSocket+0xcd>
mov    %ebx,%eax
add    $0x20,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret
lea    0xdb5(%rip),%rdi
jmp    1254 <createSocket+0xd4>
lea    0xdcd(%rip),%rdi
call   1080 <perror@plt>
mov    $0xffffffff,%ebx
jmp    1238 <createSocket+0xb8>

LLVM IR (-O0):
%struct.sockaddr_in = type { %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [22 x i8] c"Can't create a socket\00"
@SOL_SOCKET = global i32 0
@SO_REUSEADDR = global i32 0
@.str.1 = [11 x i8] c"setsockopt\00"
@INADDR_ANY = global i32 0
@.str.2 = [26 x i8] c"Can't bind name to socket\00"
define i32 @createSocket() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca %struct.sockaddr_in
store i32 7000, i32* %3
%6 = load i32, i32* @AF_INET
%7 = load i32, i32* @SOCK_STREAM
%8 = call i32 @socket(i32 %6, i32 %7, i32 0)
store i32 %8, i32* %2
%9 = icmp eq i32 %8, -1
br i1 %9, label %10, label %12
10: ; preds = %0
%11 = call i32 @perror(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %1
br label %40
12: ; preds = %0
store i32 1, i32* %4
%13 = load i32, i32* %2
%14 = load i32, i32* @SOL_SOCKET
%15 = load i32, i32* @SO_REUSEADDR
%16 = call i32 @setsockopt(i32 %13, i32 %14, i32 %15, i32* %4, i32 4)
%17 = icmp eq i32 %16, -1
br i1 %17, label %18, label %20
18: ; preds = %12
%19 = call i32 @SystemFatal(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0))
br label %20
20: ; preds = %18, %12
%21 = bitcast %struct.sockaddr_in* %5 to i8*
%22 = call i32 @bzero(i8* %21, i32 12)
%23 = load i32, i32* @AF_INET
%24 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 2
store i32 %23, i32* %24
%25 = load i32, i32* %3
%26 = call i32 @htons(i32 %25)
%27 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 1
store i32 %26, i32* %27
%28 = load i32, i32* @INADDR_ANY
%29 = call i32 @htonl(i32 %28)
%30 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 0
%31 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %30, i32 0, i32 0
store i32 %29, i32* %31
%32 = load i32, i32* %2
%33 = bitcast %struct.sockaddr_in* %5 to %struct.sockaddr*
%34 = call i32 @bind(i32 %32, %struct.sockaddr* %33, i32 12)
%35 = icmp eq i32 %34, -1
br i1 %35, label %36, label %38
36: ; preds = %20
%37 = call i32 @perror(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
store i32 -1, i32* %1
br label %40
38: ; preds = %20
%39 = load i32, i32* %2
store i32 %39, i32* %1
br label %40
40: ; preds = %38, %36, %10
%41 = load i32, i32* %1
ret i32 %41
}

LLVM IR (-O2):
%struct.sockaddr_in = type { %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [22 x i8] c"Can't create a socket\00"
@SOL_SOCKET = global i32 0
@SO_REUSEADDR = global i32 0
@.str.1 = [11 x i8] c"setsockopt\00"
@INADDR_ANY = global i32 0
@.str.2 = [26 x i8] c"Can't bind name to socket\00"
define i32 @createSocket() {
%1 = alloca i32
%2 = alloca %struct.sockaddr_in
%3 = bitcast i32* %1 to i8*
%4 = bitcast %struct.sockaddr_in* %2 to i8*
%5 = load i32, i32* @AF_INET
%6 = load i32, i32* @SOCK_STREAM
%7 = tail call i32 @socket(i32 %5, i32 %6, i32 0)
%8 = icmp eq i32 %7, -1
br i1 %8, label %9, label %11
9: ; preds = %0
%10 = tail call i32 @perror(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
br label %32
11: ; preds = %0
store i32 1, i32* %1
%12 = load i32, i32* @SOL_SOCKET
%13 = load i32, i32* @SO_REUSEADDR
%14 = call i32 @setsockopt(i32 %7, i32 %12, i32 %13, i32* %1, i32 4)
%15 = icmp eq i32 %14, -1
br i1 %15, label %16, label %18
16: ; preds = %11
%17 = call i32 @SystemFatal(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0))
br label %18
18: ; preds = %16, %11
%19 = call i32 @bzero(i8* %4, i32 12)
%20 = load i32, i32* @AF_INET
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 2
store i32 %20, i32* %21
%22 = call i32 @htons(i32 7000)
%23 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 1
store i32 %22, i32* %23
%24 = load i32, i32* @INADDR_ANY
%25 = call i32 @htonl(i32 %24)
%26 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 0, i32 0
store i32 %25, i32* %26
%27 = bitcast %struct.sockaddr_in* %2 to %struct.sockaddr*
%28 = call i32 @bind(i32 %7, %struct.sockaddr* %27, i32 12)
%29 = icmp eq i32 %28, -1
br i1 %29, label %30, label %32
30: ; preds = %18
%31 = call i32 @perror(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
br label %32
32: ; preds = %18, %30, %9
%33 = phi i32 [ -1, %9 ], [ -1, %30 ], [ %7, %18 ]
ret i32 %33
}