#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 /*<<< orphan*/ serv_addr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ EXIT_FAILURE;
int /*<<< orphan*/ MSG_OOB;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ atoi(char *);
int /*<<< orphan*/ close(int);
int connect(int, struct sockaddr *, int);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ htons(int /*<<< orphan*/);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ memset(struct sockaddr_in *, int /*<<< orphan*/, int);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ send(int, char *, int /*<<< orphan*/, int /*<<< orphan*/);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ strlen(char *);
int /*<<< orphan*/ write(int, char *, int /*<<< orphan*/);
int main(int argc, char *argv[]) {
  int sockfd;
  struct sockaddr_in serv_addr;
  if (argc != 3) {
    fprintf(stderr, "Usage: %s <ip> <port>\n", argv[0]);
    exit(EXIT_FAILURE);
  }
  sockfd = socket(AF_INET, SOCK_STREAM, 0);
  memset(&serv_addr, 0, sizeof(serv_addr));
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = inet_addr(argv[1]);
  serv_addr.sin_port = htons(atoi(argv[2]));
  if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == -1) {
    perror("connect() failed");
    exit(EXIT_FAILURE);
  }
  write(sockfd, "123", strlen("123"));
  send(sockfd, "4", strlen("4"), MSG_OOB);
  write(sockfd, "567", strlen("567"));
  send(sockfd, "890", strlen("890"), MSG_OOB);
  close(sockfd);
  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)
cmpl   $0x3,-0x8(%rbp)
je     121a <main+0x4a>
mov    0x2dd9(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xdf9(%rip),%rsi
call   10a0 <fprintf@plt>
mov    0x2dad(%rip),%rax
mov    (%rax),%edi
call   10d0 <exit@plt>
mov    0x2dc7(%rip),%rax
mov    (%rax),%edi
mov    0x2d9e(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10f0 <socket@plt>
mov    %eax,-0x14(%rbp)
lea    -0x20(%rbp),%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1070 <memset@plt>
mov    0x2d9b(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1090 <inet_addr@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   10c0 <atoi@plt>
mov    %eax,%edi
call   1050 <htons@plt>
mov    %eax,-0x20(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   10e0 <connect@plt>
cmp    $0xffffffff,%eax
jne    12ad <main+0xdd>
lea    0xd7d(%rip),%rdi
call   10b0 <perror@plt>
mov    0x2d1a(%rip),%rax
mov    (%rax),%edi
call   10d0 <exit@plt>
mov    -0x14(%rbp),%eax
mov    %eax,-0x30(%rbp)
lea    0xd6e(%rip),%rdi
call   1040 <strlen@plt>
mov    -0x30(%rbp),%edi
mov    %eax,%edx
lea    0xd5d(%rip),%rsi
call   1030 <write@plt>
mov    -0x14(%rbp),%eax
mov    %eax,-0x2c(%rbp)
lea    0xd4f(%rip),%rdi
call   1040 <strlen@plt>
mov    -0x2c(%rbp),%edi
mov    %eax,%edx
mov    0x2cf2(%rip),%rax
mov    (%rax),%ecx
lea    0xd35(%rip),%rsi
call   1060 <send@plt>
mov    -0x14(%rbp),%eax
mov    %eax,-0x28(%rbp)
lea    0xd25(%rip),%rdi
call   1040 <strlen@plt>
mov    -0x28(%rbp),%edi
mov    %eax,%edx
lea    0xd14(%rip),%rsi
call   1030 <write@plt>
mov    -0x14(%rbp),%eax
mov    %eax,-0x24(%rbp)
lea    0xd06(%rip),%rdi
call   1040 <strlen@plt>
mov    -0x24(%rbp),%edi
mov    %eax,%edx
mov    0x2ca3(%rip),%rax
mov    (%rax),%ecx
lea    0xcec(%rip),%rsi
call   1060 <send@plt>
mov    -0x14(%rbp),%edi
call   1080 <close@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    %rsi,%r14
cmp    $0x3,%edi
jne    12e7 <main+0x117>
mov    0x2dfa(%rip),%r12
mov    (%r12),%edi
mov    0x2dcf(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   10f0 <socket@plt>
mov    %eax,%ebx
lea    0x8(%rsp),%r15
mov    %r15,%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1070 <memset@plt>
mov    (%r12),%eax
mov    %eax,0x10(%rsp)
mov    0x8(%r14),%rdi
call   1090 <inet_addr@plt>
mov    %eax,0xc(%rsp)
mov    0x10(%r14),%rdi
call   10c0 <atoi@plt>
mov    %eax,%edi
call   1050 <htons@plt>
mov    %eax,0x8(%rsp)
mov    %ebx,%edi
mov    %r15,%rsi
mov    $0xc,%edx
call   10e0 <connect@plt>
cmp    $0xffffffff,%eax
je     1301 <main+0x131>
lea    0xdc8(%rip),%r14
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    %ebx,%edi
mov    %r14,%rsi
mov    %eax,%edx
call   1030 <write@plt>
lea    0xdb1(%rip),%r14
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    0x2d56(%rip),%r15
mov    (%r15),%ecx
mov    %ebx,%edi
mov    %r14,%rsi
mov    %eax,%edx
call   1060 <send@plt>
lea    0xd8e(%rip),%r14
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    %ebx,%edi
mov    %r14,%rsi
mov    %eax,%edx
call   1030 <write@plt>
lea    0xd77(%rip),%r14
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    (%r15),%ecx
mov    %ebx,%edi
mov    %r14,%rsi
mov    %eax,%edx
call   1060 <send@plt>
mov    %ebx,%edi
call   1080 <close@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret
mov    0x2ce2(%rip),%rax
mov    (%rax),%edi
mov    (%r14),%rdx
lea    0xd06(%rip),%rsi
call   10a0 <fprintf@plt>
jmp    130d <main+0x13d>
lea    0xd0f(%rip),%rdi
call   10b0 <perror@plt>
mov    0x2cac(%rip),%rax
mov    (%rax),%edi
call   10d0 <exit@plt>

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@stderr = global i32 0
@.str = [23 x i8] c"Usage: %s <ip> <port>\0A\00"
@EXIT_FAILURE = global i32 0
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.1 = [17 x i8] c"connect() failed\00"
@.str.2 = [4 x i8] c"123\00"
@.str.3 = [2 x i8] c"4\00"
@MSG_OOB = global i32 0
@.str.4 = [4 x i8] c"567\00"
@.str.5 = [4 x i8] c"890\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
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 3
br i1 %9, label %10, label %18
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = load i32, i32* @EXIT_FAILURE
%17 = call i32 @exit(i32 %16)
unreachable
18: ; preds = %2
%19 = load i32, i32* @AF_INET
%20 = load i32, i32* @SOCK_STREAM
%21 = call i32 @socket(i32 %19, i32 %20, i32 0)
store i32 %21, i32* %6
%22 = call i32 @memset(%struct.sockaddr_in* %7, i32 0, i32 12)
%23 = load i32, i32* @AF_INET
%24 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 2
store i32 %23, i32* %24
%25 = load i8**, i8*** %5
%26 = getelementptr inbounds i8*, i8** %25, i64 1
%27 = load i8*, i8** %26
%28 = call i32 @inet_addr(i8* %27)
%29 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 1
%30 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %29, i32 0, i32 0
store i32 %28, i32* %30
%31 = load i8**, i8*** %5
%32 = getelementptr inbounds i8*, i8** %31, i64 2
%33 = load i8*, i8** %32
%34 = call i32 @atoi(i8* %33)
%35 = call i32 @htons(i32 %34)
%36 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 0
store i32 %35, i32* %36
%37 = load i32, i32* %6
%38 = bitcast %struct.sockaddr_in* %7 to %struct.sockaddr*
%39 = call i32 @connect(i32 %37, %struct.sockaddr* %38, i32 12)
%40 = icmp eq i32 %39, -1
br i1 %40, label %41, label %45
41: ; preds = %18
%42 = call i32 @perror(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0))
%43 = load i32, i32* @EXIT_FAILURE
%44 = call i32 @exit(i32 %43)
unreachable
45: ; preds = %18
%46 = load i32, i32* %6
%47 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%48 = call i32 @write(i32 %46, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %47)
%49 = load i32, i32* %6
%50 = call i32 @strlen(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%51 = load i32, i32* @MSG_OOB
%52 = call i32 @send(i32 %49, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i32 %50, i32 %51)
%53 = load i32, i32* %6
%54 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%55 = call i32 @write(i32 %53, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %54)
%56 = load i32, i32* %6
%57 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0))
%58 = load i32, i32* @MSG_OOB
%59 = call i32 @send(i32 %56, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0), i32 %57, i32 %58)
%60 = load i32, i32* %6
%61 = call i32 @close(i32 %60)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@stderr = global i32 0
@.str = [23 x i8] c"Usage: %s <ip> <port>\0A\00"
@EXIT_FAILURE = global i32 0
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.1 = [17 x i8] c"connect() failed\00"
@.str.2 = [4 x i8] c"123\00"
@.str.3 = [2 x i8] c"4\00"
@MSG_OOB = global i32 0
@.str.4 = [4 x i8] c"567\00"
@.str.5 = [4 x i8] c"890\00"
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 %12, label %6
6: ; preds = %2
%7 = load i32, i32* @stderr
%8 = load i8*, i8** %1
%9 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0), i8* %8)
%10 = load i32, i32* @EXIT_FAILURE
%11 = tail call i32 @exit(i32 %10)
unreachable
12: ; preds = %2
%13 = load i32, i32* @AF_INET
%14 = load i32, i32* @SOCK_STREAM
%15 = tail call i32 @socket(i32 %13, i32 %14, i32 0)
%16 = call i32 @memset(%struct.sockaddr_in* %3, i32 0, i32 12)
%17 = load i32, i32* @AF_INET
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %17, i32* %18
%19 = getelementptr inbounds i8*, i8** %1, i64 1
%20 = load i8*, i8** %19
%21 = call i32 @inet_addr(i8* %20)
%22 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1, i32 0
store i32 %21, i32* %22
%23 = getelementptr inbounds i8*, i8** %1, i64 2
%24 = load i8*, i8** %23
%25 = call i32 @atoi(i8* %24)
%26 = call i32 @htons(i32 %25)
%27 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0
store i32 %26, i32* %27
%28 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%29 = call i32 @connect(i32 %15, %struct.sockaddr* %28, i32 12)
%30 = icmp eq i32 %29, -1
br i1 %30, label %31, label %35
31: ; preds = %12
%32 = call i32 @perror(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0))
%33 = load i32, i32* @EXIT_FAILURE
%34 = call i32 @exit(i32 %33)
unreachable
35: ; preds = %12
%36 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%37 = call i32 @write(i32 %15, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %36)
%38 = call i32 @strlen(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%39 = load i32, i32* @MSG_OOB
%40 = call i32 @send(i32 %15, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0), i32 %38, i32 %39)
%41 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%42 = call i32 @write(i32 %15, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 %41)
%43 = call i32 @strlen(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0))
%44 = load i32, i32* @MSG_OOB
%45 = call i32 @send(i32 %15, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0), i32 %43, i32 %44)
%46 = call i32 @close(i32 %15)
ret i32 0
}