#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 sockaddr_in {
  int /*<<< orphan*/ sin_addr;
  int /*<<< orphan*/ sin_port;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int /*<<< orphan*/ servaddr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ connect(int, struct sockaddr const *, int);
int /*<<< orphan*/ exit_print(char *);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_aton(char *, int /*<<< orphan*/ *);
int /*<<< orphan*/ memset(void *, int /*<<< orphan*/, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ stdin;
int /*<<< orphan*/ str_cli(int /*<<< orphan*/, int);
int main(int argc, char *argv[]) {
  struct sockaddr_in servaddr;
  int sockfd;
  if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
    exit_print("socket error.\n");
  }
  memset((void *)&servaddr, 0, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_port = htons(9999);
  inet_aton("127.0.0.1", &servaddr.sin_addr);
  connect(sockfd, (const struct sockaddr *)&servaddr, sizeof(servaddr));
  str_cli(stdin, 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)
mov    0x2e5b(%rip),%rax
mov    (%rax),%edi
mov    0x2e3a(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0x24(%rbp)
cmp    $0x0,%eax
jge    11b7 <main+0x47>
lea    0xe4e(%rip),%rdi
call   1030 <exit_print@plt>
lea    -0x20(%rbp),%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1050 <memset@plt>
mov    0x2e1a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
mov    $0x270f,%edi
call   1040 <htons@plt>
mov    %eax,-0x1c(%rbp)
lea    -0x20(%rbp),%rsi
lea    0xe24(%rip),%rdi
call   1070 <inet_aton@plt>
mov    -0x24(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1080 <connect@plt>
mov    0x2dd8(%rip),%rax
mov    (%rax),%edi
mov    -0x24(%rbp),%esi
call   1060 <str_cli@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    0x2e68(%rip),%r15
mov    (%r15),%edi
mov    0x2e46(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
test   %eax,%eax
jns    11a5 <main+0x35>
lea    0xe60(%rip),%rdi
call   1030 <exit_print@plt>
mov    %rsp,%r14
mov    %r14,%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1050 <memset@plt>
mov    (%r15),%eax
mov    %eax,0x8(%rsp)
mov    $0x270f,%edi
call   1040 <htons@plt>
mov    %eax,0x4(%rsp)
lea    0xe3c(%rip),%rdi
mov    %r14,%rsi
call   1070 <inet_aton@plt>
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   1080 <connect@plt>
mov    0x2def(%rip),%rax
mov    (%rax),%edi
mov    %ebx,%esi
call   1060 <str_cli@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, i32, i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [15 x i8] c"socket error.\0A\00"
@.str.1 = [10 x i8] c"127.0.0.1\00"
@stdin = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca %struct.sockaddr_in
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* @AF_INET
%9 = load i32, i32* @SOCK_STREAM
%10 = call i32 @socket(i32 %8, i32 %9, i32 0)
store i32 %10, i32* %7
%11 = icmp slt i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %2
%13 = call i32 @exit_print(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
br label %14
14: ; preds = %12, %2
%15 = bitcast %struct.sockaddr_in* %6 to i8*
%16 = call i32 @memset(i8* %15, i32 0, i32 12)
%17 = load i32, i32* @AF_INET
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %6, i32 0, i32 2
store i32 %17, i32* %18
%19 = call i32 @htons(i32 9999)
%20 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %6, i32 0, i32 1
store i32 %19, i32* %20
%21 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %6, i32 0, i32 0
%22 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %21)
%23 = load i32, i32* %7
%24 = bitcast %struct.sockaddr_in* %6 to %struct.sockaddr*
%25 = call i32 @connect(i32 %23, %struct.sockaddr* %24, i32 12)
%26 = load i32, i32* @stdin
%27 = load i32, i32* %7
%28 = call i32 @str_cli(i32 %26, i32 %27)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, i32, i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@.str = [15 x i8] c"socket error.\0A\00"
@.str.1 = [10 x i8] c"127.0.0.1\00"
@stdin = global i32 0
define i32 @main(i32 %0, i8** nocapture readnone %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 = icmp slt i32 %7, 0
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = tail call i32 @exit_print(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
br label %11
11: ; preds = %9, %2
%12 = call i32 @memset(i8* %4, i32 0, i32 12)
%13 = load i32, i32* @AF_INET
%14 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %13, i32* %14
%15 = call i32 @htons(i32 9999)
%16 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1
store i32 %15, i32* %16
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0
%18 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %17)
%19 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%20 = call i32 @connect(i32 %7, %struct.sockaddr* %19, i32 12)
%21 = load i32, i32* @stdin
%22 = call i32 @str_cli(i32 %21, i32 %7)
ret i32 0
}