#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 */
struct in_addr {
  int dummy;
};
struct sockaddr_in {
  int /*<<< orphan*/ sin_port;
  struct in_addr sin_addr;
  int /*<<< orphan*/ sin_family;
};
struct hostent {
  scalar_t__ h_addr;
};

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ PF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int connect(int, struct sockaddr_in *, int);
int /*<<< orphan*/ get_home_page(int);
struct hostent *gethostbyname(char *const);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ perror(char *);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int main(int argc, char *const argv[]) {
  int socket_fd;
  struct sockaddr_in name;
  struct hostent *hostinfo;
  socket_fd = socket(PF_INET, SOCK_STREAM, 0);
  name.sin_family = AF_INET;
  hostinfo = gethostbyname(argv[1]);
  if (hostinfo == NULL) {
    return 1;
  } else {
    name.sin_addr = *((struct in_addr *)hostinfo->h_addr);
  }
  name.sin_port = htons(80);
  if (connect(socket_fd, &name, sizeof(struct sockaddr_in)) == -1) {
    perror("connect");
    return 1;
  }
  get_home_page(socket_fd);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    0x2e53(%rip),%rax
mov    (%rax),%edi
mov    0x2e52(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1080 <socket@plt>
mov    %eax,-0x14(%rbp)
mov    0x2e4f(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <gethostbyname@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    11c6 <main+0x66>
movl   $0x1,-0x4(%rbp)
jmp    1220 <main+0xc0>
mov    -0x28(%rbp),%rax
mov    (%rax),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    $0x50,%edi
call   1030 <htons@plt>
mov    %eax,-0x20(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1070 <connect@plt>
cmp    $0xffffffff,%eax
jne    1211 <main+0xb1>
lea    0xe00(%rip),%rdi
call   1050 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    1220 <main+0xc0>
mov    -0x14(%rbp),%edi
call   1060 <get_home_page@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
sub    $0x18,%rsp
mov    %rsi,%rbx
mov    0x2e60(%rip),%rax
mov    (%rax),%edi
mov    0x2e5f(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1080 <socket@plt>
mov    %eax,%ebp
mov    0x2e5d(%rip),%rax
mov    (%rax),%eax
mov    %eax,0x10(%rsp)
mov    0x8(%rbx),%rdi
call   1040 <gethostbyname@plt>
mov    $0x1,%ebx
test   %rax,%rax
je     11da <main+0x7a>
mov    (%rax),%rax
mov    (%rax),%eax
mov    %eax,0xc(%rsp)
mov    $0x50,%edi
call   1030 <htons@plt>
mov    %eax,0x8(%rsp)
lea    0x8(%rsp),%rsi
mov    %ebp,%edi
mov    $0xc,%edx
call   1070 <connect@plt>
cmp    $0xffffffff,%eax
je     11e3 <main+0x83>
mov    %ebp,%edi
call   1060 <get_home_page@plt>
xor    %ebx,%ebx
mov    %ebx,%eax
add    $0x18,%rsp
pop    %rbx
pop    %rbp
ret
lea    0xe16(%rip),%rdi
call   1050 <perror@plt>
jmp    11da <main+0x7a>

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.in_addr, i32 }
%struct.in_addr = type { i32 }
%struct.hostent = type { i64 }
@PF_INET = global i32 0
@SOCK_STREAM = global i32 0
@AF_INET = global i32 0
@.str = [8 x i8] c"connect\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca %struct.sockaddr_in
%8 = alloca %struct.hostent*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i32, i32* @PF_INET
%10 = load i32, i32* @SOCK_STREAM
%11 = call i32 @socket(i32 %9, i32 %10, i32 0)
store i32 %11, i32* %6
%12 = load i32, i32* @AF_INET
%13 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 2
store i32 %12, i32* %13
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
%17 = call %struct.hostent* @gethostbyname(i8* %16)
store %struct.hostent* %17, %struct.hostent** %8
%18 = load %struct.hostent*, %struct.hostent** %8
%19 = icmp eq %struct.hostent* %18, null
br i1 %19, label %20, label %21
20: ; preds = %2
store i32 1, i32* %3
br label %40
21: ; preds = %2
%22 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 1
%23 = load %struct.hostent*, %struct.hostent** %8
%24 = getelementptr inbounds %struct.hostent, %struct.hostent* %23, i32 0, i32 0
%25 = load i64, i64* %24
%26 = inttoptr i64 %25 to %struct.in_addr*
%27 = bitcast %struct.in_addr* %22 to i8*
%28 = bitcast %struct.in_addr* %26 to i8*
br label %29
29: ; preds = %21
%30 = call i32 @htons(i32 80)
%31 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 0
store i32 %30, i32* %31
%32 = load i32, i32* %6
%33 = call i32 @connect(i32 %32, %struct.sockaddr_in* %7, i32 12)
%34 = icmp eq i32 %33, -1
br i1 %34, label %35, label %37
35: ; preds = %29
%36 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %40
37: ; preds = %29
%38 = load i32, i32* %6
%39 = call i32 @get_home_page(i32 %38)
store i32 0, i32* %3
br label %40
40: ; preds = %37, %35, %20
%41 = load i32, i32* %3
ret i32 %41
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.in_addr, i32 }
%struct.in_addr = type { i32 }
%struct.hostent = type { i64 }
@PF_INET = global i32 0
@SOCK_STREAM = global i32 0
@AF_INET = global i32 0
@.str = [8 x i8] c"connect\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca %struct.sockaddr_in
%4 = bitcast %struct.sockaddr_in* %3 to i8*
%5 = load i32, i32* @PF_INET
%6 = load i32, i32* @SOCK_STREAM
%7 = tail call i32 @socket(i32 %5, i32 %6, i32 0)
%8 = load i32, i32* @AF_INET
%9 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %8, i32* %9
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = tail call %struct.hostent* @gethostbyname(i8* %11)
%13 = icmp eq %struct.hostent* %12, null
br i1 %13, label %28, label %14
14: ; preds = %2
%15 = getelementptr inbounds %struct.hostent, %struct.hostent* %12, i64 0, i32 0
%16 = load i64, i64* %15
%17 = inttoptr i64 %16 to i32*
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1, i32 0
%19 = load i32, i32* %17
store i32 %19, i32* %18
%20 = tail call i32 @htons(i32 80)
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0
store i32 %20, i32* %21
%22 = call i32 @connect(i32 %7, %struct.sockaddr_in* %3, i32 12)
%23 = icmp eq i32 %22, -1
br i1 %23, label %24, label %26
24: ; preds = %14
%25 = call i32 @perror(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
br label %28
26: ; preds = %14
%27 = call i32 @get_home_page(i32 %7)
br label %28
28: ; preds = %2, %26, %24
%29 = phi i32 [ 1, %24 ], [ 0, %26 ], [ 1, %2 ]
ret i32 %29
}