#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 {
  int /*<<< orphan*/ sin_port;
  TYPE_1__ sin_addr;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int socklen_t;
typedef int /*<<< orphan*/ address;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int connect(int, struct sockaddr *, int);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ htons(unsigned short);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ memset(struct sockaddr_in *, int /*<<< orphan*/, int);
int /*<<< orphan*/ perror(char *);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int connect_server(char *hostname, unsigned short port) {
  int sock;
  int r;
  struct sockaddr_in address;
  socklen_t addr_len;
  sock = socket(AF_INET, SOCK_STREAM, 0);
  memset(&address, 0, sizeof(address));
  address.sin_family = AF_INET;
  address.sin_addr.s_addr = inet_addr(hostname);
  address.sin_port = htons(port);
  addr_len = sizeof(address);
  r = connect(sock, (struct sockaddr *)&address, addr_len);
  if (r == -1) {
    perror("connect");
    exit(3);
  }
  return sock;
}


x86 assembly (clang, -O0):
<connect_server>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %si,%ax
mov    %rdi,-0x8(%rbp)
mov    %ax,-0xa(%rbp)
mov    0x2e5e(%rip),%rax
mov    (%rax),%edi
mov    0x2e45(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0x10(%rbp)
lea    -0x20(%rbp),%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    0x2e32(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0x8(%rbp),%rdi
call   1050 <inet_addr@plt>
mov    %eax,-0x1c(%rbp)
movzwl -0xa(%rbp),%edi
call   1030 <htons@plt>
mov    %eax,-0x20(%rbp)
movl   $0xc,-0x24(%rbp)
mov    -0x10(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    -0x24(%rbp),%edx
call   1080 <connect@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0xffffffff,-0x14(%rbp)
jne    120c <connect_server+0x9c>
lea    0xe03(%rip),%rdi
call   1060 <perror@plt>
mov    $0x3,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<connect_server>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
mov    %esi,%r14d
mov    %rdi,%rbp
mov    0x2e5f(%rip),%r12
mov    (%r12),%edi
mov    0x2e44(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
mov    %rsp,%r15
mov    %r15,%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    (%r12),%eax
mov    %eax,0x8(%rsp)
mov    %rbp,%rdi
call   1050 <inet_addr@plt>
mov    %eax,0x4(%rsp)
mov    %r14d,%edi
call   1030 <htons@plt>
mov    %eax,(%rsp)
mov    %ebx,%edi
mov    %r15,%rsi
mov    $0xc,%edx
call   1080 <connect@plt>
cmp    $0xffffffff,%eax
je     11f3 <connect_server+0x83>
mov    %ebx,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xe06(%rip),%rdi
call   1060 <perror@plt>
mov    $0x3,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [8 x i8] c"connect\00"
define i32 @connect_server(i8* %0, i16 zeroext %1) {
%3 = alloca i8*
%4 = alloca i16
%5 = alloca i32
%6 = alloca i32
%7 = alloca %struct.sockaddr_in
%8 = alloca i32
store i8* %0, i8** %3
store i16 %1, i16* %4
%9 = load i32, i32* @AF_INET
%10 = load i32, i32* @SOCK_STREAM
%11 = call i32 @socket(i32 %9, i32 %10, i32 0)
store i32 %11, i32* %5
%12 = call i32 @memset(%struct.sockaddr_in* %7, i32 0, i32 12)
%13 = load i32, i32* @AF_INET
%14 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 2
store i32 %13, i32* %14
%15 = load i8*, i8** %3
%16 = call i32 @inet_addr(i8* %15)
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 1
%18 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %17, i32 0, i32 0
store i32 %16, i32* %18
%19 = load i16, i16* %4
%20 = call i32 @htons(i16 zeroext %19)
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 0
store i32 %20, i32* %21
store i32 12, i32* %8
%22 = load i32, i32* %5
%23 = bitcast %struct.sockaddr_in* %7 to %struct.sockaddr*
%24 = load i32, i32* %8
%25 = call i32 @connect(i32 %22, %struct.sockaddr* %23, i32 %24)
store i32 %25, i32* %6
%26 = load i32, i32* %6
%27 = icmp eq i32 %26, -1
br i1 %27, label %28, label %31
28: ; preds = %2
%29 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%30 = call i32 @exit(i32 3)
unreachable
31: ; preds = %2
%32 = load i32, i32* %5
ret i32 %32
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [8 x i8] c"connect\00"
define i32 @connect_server(i8* %0, i16 zeroext %1) {
%3 = alloca %struct.sockaddr_in
%4 = bitcast %struct.sockaddr_in* %3 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 = call i32 @memset(%struct.sockaddr_in* %3, i32 0, i32 12)
%9 = load i32, i32* @AF_INET
%10 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %9, i32* %10
%11 = call i32 @inet_addr(i8* %0)
%12 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1, i32 0
store i32 %11, i32* %12
%13 = call i32 @htons(i16 zeroext %1)
%14 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0
store i32 %13, i32* %14
%15 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%16 = call i32 @connect(i32 %7, %struct.sockaddr* %15, i32 12)
%17 = icmp eq i32 %16, -1
br i1 %17, label %18, label %21
18: ; preds = %2
%19 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%20 = call i32 @exit(i32 3)
unreachable
21: ; preds = %2
ret i32 %7
}