#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 */
typedef int /*<<< orphan*/ uint64_t;
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*/ serv_addr;
typedef int /*<<< orphan*/ cli_addr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ INADDR_ANY;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ SOL_SOCKET;
int /*<<< orphan*/ SO_REUSEADDR;
int accept(int, struct sockaddr *, int *);
int atoi(char *);
scalar_t__ bind(int, struct sockaddr *, int);
int /*<<< orphan*/ bzero(char *, int);
int /*<<< orphan*/ close(int);
int /*<<< orphan*/ error(char *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ listen(int, int);
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ query_buffer(int /*<<< orphan*/, int);
int read(int, char *, int);
int /*<<< orphan*/ setsockopt(int, int /*<<< orphan*/, int /*<<< orphan*/,
                              char const *, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int write(int, char *, int);
int main(int argc, char *argv[]) {
  int sockfd, newsockfd, portno;
  socklen_t clilen;
  char buffer[256];
  struct sockaddr_in serv_addr, cli_addr;
  int n;
  int opt = 1;
  if (argc < 2) {
    error("ERROR, no port provided\n");
    exit(1);
  }
  sockfd = socket(AF_INET, SOCK_STREAM, 0);
  if (sockfd < 0)
    error("ERROR opening socket");
  bzero((char *)&serv_addr, sizeof(serv_addr));
  portno = atoi(argv[1]);
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = INADDR_ANY;
  serv_addr.sin_port = htons(portno);
  setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char *)&opt, sizeof(int));
  if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
    error("ERROR on binding");
  listen(sockfd, 5);
  clilen = sizeof(cli_addr);
  newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
  if (newsockfd < 0)
    error("ERROR on accept");
  bzero(buffer, 256);
  n = read(newsockfd, buffer, 255);
  if (n < 0)
    error("ERROR reading from socket");
  printf("Server Buffer: %s\n", buffer);
  query_buffer((uint64_t)&buffer, 256);
  n = write(newsockfd, "I got your message!", 19);
  if (n < 0)
    error("ERROR writing to socket");
  close(newsockfd);
  close(sockfd);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x150,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x1,-0x148(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1233 <main+0x43>
lea    0xddc(%rip),%rdi
call   10b0 <error@plt>
mov    $0x1,%edi
call   1100 <exit@plt>
mov    0x2da6(%rip),%rax
mov    (%rax),%edi
mov    0x2d85(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1110 <socket@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x0,-0x14(%rbp)
jge    1265 <main+0x75>
lea    0xdb9(%rip),%rdi
call   10b0 <error@plt>
lea    -0x130(%rbp),%rdi
mov    $0xc,%esi
call   10c0 <bzero@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   10f0 <atoi@plt>
mov    %eax,-0x1c(%rbp)
mov    0x2d53(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x128(%rbp)
mov    0x2d3c(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x12c(%rbp)
mov    -0x1c(%rbp),%edi
call   1050 <htons@plt>
mov    %eax,-0x130(%rbp)
mov    -0x14(%rbp),%edi
mov    0x2d2c(%rip),%rax
mov    (%rax),%esi
mov    0x2cfb(%rip),%rax
mov    (%rax),%edx
lea    -0x148(%rbp),%rcx
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
mov    -0x14(%rbp),%edi
lea    -0x130(%rbp),%rsi
mov    $0xc,%edx
call   10a0 <bind@plt>
cmp    $0x0,%rax
jge    1303 <main+0x113>
lea    0xd30(%rip),%rdi
call   10b0 <error@plt>
mov    -0x14(%rbp),%edi
mov    $0x5,%esi
call   1090 <listen@plt>
movl   $0xc,-0x20(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x140(%rbp),%rsi
lea    -0x20(%rbp),%rdx
call   10e0 <accept@plt>
mov    %eax,-0x18(%rbp)
cmpl   $0x0,-0x18(%rbp)
jge    1343 <main+0x153>
lea    0xd01(%rip),%rdi
call   10b0 <error@plt>
lea    -0x120(%rbp),%rdi
mov    $0x100,%esi
call   10c0 <bzero@plt>
mov    -0x18(%rbp),%edi
lea    -0x120(%rbp),%rsi
mov    $0xff,%edx
call   1080 <read@plt>
mov    %eax,-0x144(%rbp)
cmpl   $0x0,-0x144(%rbp)
jge    1387 <main+0x197>
lea    0xccd(%rip),%rdi
call   10b0 <error@plt>
lea    -0x120(%rbp),%rsi
lea    0xcd4(%rip),%rdi
call   1060 <printf@plt>
lea    -0x120(%rbp),%rax
mov    %eax,%edi
mov    $0x100,%esi
call   10d0 <query_buffer@plt>
mov    -0x18(%rbp),%edi
lea    0xcc5(%rip),%rsi
mov    $0x13,%edx
call   1040 <write@plt>
mov    %eax,-0x144(%rbp)
cmpl   $0x0,-0x144(%rbp)
jge    13e0 <main+0x1f0>
lea    0xcb5(%rip),%rdi
call   10b0 <error@plt>
mov    -0x18(%rbp),%edi
call   1070 <close@plt>
mov    -0x14(%rbp),%edi
call   1070 <close@plt>
xor    %eax,%eax
add    $0x150,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %rbx
sub    $0x138,%rsp
movl   $0x1,0x8(%rsp)
cmp    $0x1,%edi
jle    1388 <main+0x198>
mov    %rsi,%rbp
mov    0x2dc8(%rip),%rbx
mov    (%rbx),%edi
mov    0x2da7(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1110 <socket@plt>
mov    %eax,%r15d
test   %eax,%eax
jns    123d <main+0x4d>
lea    0xde1(%rip),%rdi
call   10b0 <error@plt>
lea    0x10(%rsp),%r14
mov    %r14,%rdi
mov    $0xc,%esi
call   10c0 <bzero@plt>
mov    0x8(%rbp),%rdi
call   10f0 <atoi@plt>
mov    (%rbx),%ecx
mov    %ecx,0x18(%rsp)
mov    0x2d73(%rip),%rcx
mov    (%rcx),%ecx
mov    %ecx,0x14(%rsp)
mov    %eax,%edi
call   1050 <htons@plt>
mov    %eax,0x10(%rsp)
mov    0x2d6b(%rip),%rax
mov    (%rax),%esi
mov    0x2d3a(%rip),%rax
mov    (%rax),%edx
lea    0x8(%rsp),%rcx
mov    %r15d,%edi
mov    $0x4,%r8d
call   1030 <setsockopt@plt>
mov    %r15d,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   10a0 <bind@plt>
test   %rax,%rax
jns    12bc <main+0xcc>
lea    0xd77(%rip),%rdi
call   10b0 <error@plt>
mov    %r15d,%edi
mov    $0x5,%esi
call   1090 <listen@plt>
movl   $0xc,0xc(%rsp)
lea    0x20(%rsp),%rsi
lea    0xc(%rsp),%rdx
mov    %r15d,%edi
call   10e0 <accept@plt>
mov    %eax,%ebp
test   %eax,%eax
jns    12f5 <main+0x105>
lea    0xd4f(%rip),%rdi
call   10b0 <error@plt>
lea    0x30(%rsp),%rbx
mov    %rbx,%rdi
mov    $0x100,%esi
call   10c0 <bzero@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    $0xff,%edx
call   1080 <read@plt>
test   %eax,%eax
jns    1326 <main+0x136>
lea    0xd2e(%rip),%rdi
call   10b0 <error@plt>
lea    0xd3c(%rip),%rdi
lea    0x30(%rsp),%rbx
mov    %rbx,%rsi
call   1060 <printf@plt>
mov    %ebx,%edi
mov    $0x100,%esi
call   10d0 <query_buffer@plt>
lea    0xd2f(%rip),%rsi
mov    %ebp,%edi
mov    $0x13,%edx
call   1040 <write@plt>
test   %eax,%eax
jns    1369 <main+0x179>
lea    0xd2c(%rip),%rdi
call   10b0 <error@plt>
mov    %ebp,%edi
call   1070 <close@plt>
mov    %r15d,%edi
call   1070 <close@plt>
xor    %eax,%eax
add    $0x138,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xc71(%rip),%rdi
call   10b0 <error@plt>
mov    $0x1,%edi
call   1100 <exit@plt>

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@.str = [25 x i8] c"ERROR, no port provided\0A\00"
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.1 = [21 x i8] c"ERROR opening socket\00"
@INADDR_ANY = global i32 0
@SOL_SOCKET = global i32 0
@SO_REUSEADDR = global i32 0
@.str.2 = [17 x i8] c"ERROR on binding\00"
@.str.3 = [16 x i8] c"ERROR on accept\00"
@.str.4 = [26 x i8] c"ERROR reading from socket\00"
@.str.5 = [19 x i8] c"Server Buffer: %s\0A\00"
@.str.6 = [20 x i8] c"I got your message!\00"
@.str.7 = [24 x i8] c"ERROR writing to socket\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca i32
%10 = alloca [256 x i8]
%11 = alloca %struct.sockaddr_in
%12 = alloca %struct.sockaddr_in
%13 = alloca i32
%14 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i32 1, i32* %14
%15 = load i32, i32* %4
%16 = icmp slt i32 %15, 2
br i1 %16, label %17, label %20
17: ; preds = %2
%18 = call i32 @error(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%19 = call i32 @exit(i32 1)
unreachable
20: ; preds = %2
%21 = load i32, i32* @AF_INET
%22 = load i32, i32* @SOCK_STREAM
%23 = call i32 @socket(i32 %21, i32 %22, i32 0)
store i32 %23, i32* %6
%24 = load i32, i32* %6
%25 = icmp slt i32 %24, 0
br i1 %25, label %26, label %28
26: ; preds = %20
%27 = call i32 @error(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0))
br label %28
28: ; preds = %26, %20
%29 = bitcast %struct.sockaddr_in* %11 to i8*
%30 = call i32 @bzero(i8* %29, i32 12)
%31 = load i8**, i8*** %5
%32 = getelementptr inbounds i8*, i8** %31, i64 1
%33 = load i8*, i8** %32
%34 = call i32 @atoi(i8* %33)
store i32 %34, i32* %8
%35 = load i32, i32* @AF_INET
%36 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 2
store i32 %35, i32* %36
%37 = load i32, i32* @INADDR_ANY
%38 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 1
%39 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %38, i32 0, i32 0
store i32 %37, i32* %39
%40 = load i32, i32* %8
%41 = call i32 @htons(i32 %40)
%42 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %11, i32 0, i32 0
store i32 %41, i32* %42
%43 = load i32, i32* %6
%44 = load i32, i32* @SOL_SOCKET
%45 = load i32, i32* @SO_REUSEADDR
%46 = bitcast i32* %14 to i8*
%47 = call i32 @setsockopt(i32 %43, i32 %44, i32 %45, i8* %46, i32 4)
%48 = load i32, i32* %6
%49 = bitcast %struct.sockaddr_in* %11 to %struct.sockaddr*
%50 = call i64 @bind(i32 %48, %struct.sockaddr* %49, i32 12)
%51 = icmp slt i64 %50, 0
br i1 %51, label %52, label %54
52: ; preds = %28
%53 = call i32 @error(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0))
br label %54
54: ; preds = %52, %28
%55 = load i32, i32* %6
%56 = call i32 @listen(i32 %55, i32 5)
store i32 12, i32* %9
%57 = load i32, i32* %6
%58 = bitcast %struct.sockaddr_in* %12 to %struct.sockaddr*
%59 = call i32 @accept(i32 %57, %struct.sockaddr* %58, i32* %9)
store i32 %59, i32* %7
%60 = load i32, i32* %7
%61 = icmp slt i32 %60, 0
br i1 %61, label %62, label %64
62: ; preds = %54
%63 = call i32 @error(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
br label %64
64: ; preds = %62, %54
%65 = getelementptr inbounds [256 x i8], [256 x i8]* %10, i64 0, i64 0
%66 = call i32 @bzero(i8* %65, i32 256)
%67 = load i32, i32* %7
%68 = getelementptr inbounds [256 x i8], [256 x i8]* %10, i64 0, i64 0
%69 = call i32 @read(i32 %67, i8* %68, i32 255)
store i32 %69, i32* %13
%70 = load i32, i32* %13
%71 = icmp slt i32 %70, 0
br i1 %71, label %72, label %74
72: ; preds = %64
%73 = call i32 @error(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0))
br label %74
74: ; preds = %72, %64
%75 = getelementptr inbounds [256 x i8], [256 x i8]* %10, i64 0, i64 0
%76 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i8* %75)
%77 = ptrtoint [256 x i8]* %10 to i32
%78 = call i32 @query_buffer(i32 %77, i32 256)
%79 = load i32, i32* %7
%80 = call i32 @write(i32 %79, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.6, i64 0, i64 0), i32 19)
store i32 %80, i32* %13
%81 = load i32, i32* %13
%82 = icmp slt i32 %81, 0
br i1 %82, label %83, label %85
83: ; preds = %74
%84 = call i32 @error(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.7, i64 0, i64 0))
br label %85
85: ; preds = %83, %74
%86 = load i32, i32* %7
%87 = call i32 @close(i32 %86)
%88 = load i32, i32* %6
%89 = call i32 @close(i32 %88)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@.str = [25 x i8] c"ERROR, no port provided\0A\00"
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str.1 = [21 x i8] c"ERROR opening socket\00"
@INADDR_ANY = global i32 0
@SOL_SOCKET = global i32 0
@SO_REUSEADDR = global i32 0
@.str.2 = [17 x i8] c"ERROR on binding\00"
@.str.3 = [16 x i8] c"ERROR on accept\00"
@.str.4 = [26 x i8] c"ERROR reading from socket\00"
@.str.5 = [19 x i8] c"Server Buffer: %s\0A\00"
@.str.6 = [20 x i8] c"I got your message!\00"
@.str.7 = [24 x i8] c"ERROR writing to socket\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca i32
%4 = alloca [256 x i8]
%5 = alloca %struct.sockaddr_in
%6 = alloca %struct.sockaddr_in
%7 = alloca i32
%8 = bitcast i32* %3 to i8*
%9 = getelementptr inbounds [256 x i8], [256 x i8]* %4, i64 0, i64 0
%10 = bitcast %struct.sockaddr_in* %5 to i8*
%11 = bitcast %struct.sockaddr_in* %6 to i8*
%12 = bitcast i32* %7 to i8*
store i32 1, i32* %7
%13 = icmp slt i32 %0, 2
br i1 %13, label %14, label %17
14: ; preds = %2
%15 = tail call i32 @error(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
%16 = tail call i32 @exit(i32 1)
unreachable
17: ; preds = %2
%18 = load i32, i32* @AF_INET
%19 = load i32, i32* @SOCK_STREAM
%20 = tail call i32 @socket(i32 %18, i32 %19, i32 0)
%21 = icmp slt i32 %20, 0
br i1 %21, label %22, label %24
22: ; preds = %17
%23 = tail call i32 @error(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0))
br label %24
24: ; preds = %22, %17
%25 = call i32 @bzero(i8* %10, i32 12)
%26 = getelementptr inbounds i8*, i8** %1, i64 1
%27 = load i8*, i8** %26
%28 = tail call i32 @atoi(i8* %27)
%29 = load i32, i32* @AF_INET
%30 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 2
store i32 %29, i32* %30
%31 = load i32, i32* @INADDR_ANY
%32 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 1, i32 0
store i32 %31, i32* %32
%33 = tail call i32 @htons(i32 %28)
%34 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %5, i64 0, i32 0
store i32 %33, i32* %34
%35 = load i32, i32* @SOL_SOCKET
%36 = load i32, i32* @SO_REUSEADDR
%37 = call i32 @setsockopt(i32 %20, i32 %35, i32 %36, i8* %12, i32 4)
%38 = bitcast %struct.sockaddr_in* %5 to %struct.sockaddr*
%39 = call i64 @bind(i32 %20, %struct.sockaddr* %38, i32 12)
%40 = icmp slt i64 %39, 0
br i1 %40, label %41, label %43
41: ; preds = %24
%42 = call i32 @error(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0))
br label %43
43: ; preds = %41, %24
%44 = call i32 @listen(i32 %20, i32 5)
store i32 12, i32* %3
%45 = bitcast %struct.sockaddr_in* %6 to %struct.sockaddr*
%46 = call i32 @accept(i32 %20, %struct.sockaddr* %45, i32* %3)
%47 = icmp slt i32 %46, 0
br i1 %47, label %48, label %50
48: ; preds = %43
%49 = call i32 @error(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
br label %50
50: ; preds = %48, %43
%51 = call i32 @bzero(i8* %9, i32 256)
%52 = call i32 @read(i32 %46, i8* %9, i32 255)
%53 = icmp slt i32 %52, 0
br i1 %53, label %54, label %56
54: ; preds = %50
%55 = call i32 @error(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0))
br label %56
56: ; preds = %54, %50
%57 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i8* %9)
%58 = ptrtoint [256 x i8]* %4 to i64
%59 = trunc i64 %58 to i32
%60 = call i32 @query_buffer(i32 %59, i32 256)
%61 = call i32 @write(i32 %46, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.6, i64 0, i64 0), i32 19)
%62 = icmp slt i32 %61, 0
br i1 %62, label %63, label %65
63: ; preds = %56
%64 = call i32 @error(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.7, i64 0, i64 0))
br label %65
65: ; preds = %63, %56
%66 = call i32 @close(i32 %46)
%67 = call i32 @close(i32 %20)
ret i32 0
}