#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;
};

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ atoi(char *);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ htons(int /*<<< orphan*/);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ write(int, struct sockaddr_in *, int);
int main(int argc, char *argv[]) {
  struct sockaddr_in addr;
  if (argc != 3) {
    printf("Usage: %s <target IP> <target port>\n", argv[0]);
    exit(0);
  }
  addr.sin_family = AF_INET;
  addr.sin_port = htons(atoi(argv[2]));
  addr.sin_addr.s_addr = inet_addr(argv[1]);
  write(1, &addr, sizeof(struct sockaddr_in));
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x4(%rbp)
je     1193 <main+0x33>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xe79(%rip),%rdi
call   1050 <printf@plt>
xor    %edi,%edi
call   1080 <exit@plt>
mov    0x2e4e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   1070 <atoi@plt>
mov    %eax,%edi
call   1040 <htons@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <inet_addr@plt>
mov    %eax,-0x20(%rbp)
mov    $0x1,%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1030 <write@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
mov    %rsi,%rbx
cmp    $0x3,%edi
jne    11b4 <main+0x54>
mov    0x2e74(%rip),%rax
mov    (%rax),%eax
mov    %eax,0x8(%rsp)
mov    0x10(%rbx),%rdi
call   1070 <atoi@plt>
mov    %eax,%edi
call   1040 <htons@plt>
mov    %eax,0x4(%rsp)
mov    0x8(%rbx),%rdi
call   1060 <inet_addr@plt>
mov    %eax,(%rsp)
mov    %rsp,%rsi
mov    $0x1,%edi
mov    $0xc,%edx
call   1030 <write@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret
mov    (%rbx),%rsi
lea    0xe42(%rip),%rdi
call   1050 <printf@plt>
xor    %edi,%edi
call   1080 <exit@plt>

LLVM IR (-O0):
%struct.sockaddr_in = type { %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
@.str = [37 x i8] c"Usage: %s <target IP> <target port>\0A\00"
@AF_INET = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca %struct.sockaddr_in
store i32 %0, i32* %3
store i8** %1, i8*** %4
%6 = load i32, i32* %3
%7 = icmp ne i32 %6, 3
br i1 %7, label %8, label %14
8: ; preds = %2
%9 = load i8**, i8*** %4
%10 = getelementptr inbounds i8*, i8** %9, i64 0
%11 = load i8*, i8** %10
%12 = call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0), i8* %11)
%13 = call i32 @exit(i32 0)
unreachable
14: ; preds = %2
%15 = load i32, i32* @AF_INET
%16 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 2
store i32 %15, i32* %16
%17 = load i8**, i8*** %4
%18 = getelementptr inbounds i8*, i8** %17, i64 2
%19 = load i8*, i8** %18
%20 = call i32 @atoi(i8* %19)
%21 = call i32 @htons(i32 %20)
%22 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 1
store i32 %21, i32* %22
%23 = load i8**, i8*** %4
%24 = getelementptr inbounds i8*, i8** %23, i64 1
%25 = load i8*, i8** %24
%26 = call i32 @inet_addr(i8* %25)
%27 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i32 0, i32 0
%28 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %27, i32 0, i32 0
store i32 %26, i32* %28
%29 = call i32 @write(i32 1, %struct.sockaddr_in* %5, i32 12)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
@.str = [37 x i8] c"Usage: %s <target IP> <target port>\0A\00"
@AF_INET = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca %struct.sockaddr_in
%4 = bitcast %struct.sockaddr_in* %3 to i8*
%5 = icmp eq i32 %0, 3
br i1 %5, label %10, label %6
6: ; preds = %2
%7 = load i8*, i8** %1
%8 = tail call i32 @printf(i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str, i64 0, i64 0), i8* %7)
%9 = tail call i32 @exit(i32 0)
unreachable
10: ; preds = %2
%11 = load i32, i32* @AF_INET
%12 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %11, i32* %12
%13 = getelementptr inbounds i8*, i8** %1, i64 2
%14 = load i8*, i8** %13
%15 = tail call i32 @atoi(i8* %14)
%16 = tail call i32 @htons(i32 %15)
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1
store i32 %16, i32* %17
%18 = getelementptr inbounds i8*, i8** %1, i64 1
%19 = load i8*, i8** %18
%20 = tail call i32 @inet_addr(i8* %19)
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0, i32 0
store i32 %20, i32* %21
%22 = call i32 @write(i32 1, %struct.sockaddr_in* %3, i32 12)
ret i32 0
}