#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_zero;
  TYPE_1__ sin_addr;
  int /*<<< orphan*/ sin_port;
  int /*<<< orphan*/ sin_family;
};
struct sockaddr {
  int dummy;
};
typedef int socklen_t;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ PF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ connect(int, struct sockaddr *, int);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ memset(int /*<<< orphan*/, char, int);
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ recv(int, char *, int, int /*<<< orphan*/);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int main() {
  int clientSocket;
  char buffer[1024];
  struct sockaddr_in serverAddr;
  socklen_t addr_size;
  clientSocket = socket(PF_INET, SOCK_STREAM, 0);
  serverAddr.sin_family = AF_INET;
  serverAddr.sin_port = htons(7891);
  serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
  memset(serverAddr.sin_zero, '\0', sizeof serverAddr.sin_zero);
  addr_size = sizeof serverAddr;
  connect(clientSocket, (struct sockaddr *)&serverAddr, addr_size);
  recv(clientSocket, buffer, 1024, 0);
  printf("Data received: %s", buffer);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x430,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e47(%rip),%rax
mov    (%rax),%edi
mov    0x2e46(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0x8(%rbp)
mov    0x2e43(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x414(%rbp)
mov    $0x1ed3,%edi
call   1040 <htons@plt>
mov    %eax,-0x418(%rbp)
lea    0xe3c(%rip),%rdi
call   1070 <inet_addr@plt>
mov    %eax,-0x41c(%rbp)
mov    -0x420(%rbp),%edi
xor    %esi,%esi
mov    $0x4,%edx
call   1060 <memset@plt>
movl   $0x10,-0x424(%rbp)
mov    -0x8(%rbp),%edi
lea    -0x420(%rbp),%rsi
mov    -0x424(%rbp),%edx
call   1080 <connect@plt>
mov    -0x8(%rbp),%edi
lea    -0x410(%rbp),%rsi
mov    $0x400,%edx
xor    %ecx,%ecx
call   1030 <recv@plt>
lea    -0x410(%rbp),%rsi
lea    0xde6(%rip),%rdi
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x430,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x418,%rsp
mov    0x2e4f(%rip),%rax
mov    (%rax),%edi
mov    0x2e4e(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
mov    0x2e4c(%rip),%rax
mov    (%rax),%eax
mov    %eax,0xc(%rsp)
mov    $0x1ed3,%edi
call   1040 <htons@plt>
mov    %eax,0x8(%rsp)
lea    0xe49(%rip),%rdi
call   1070 <inet_addr@plt>
mov    %eax,0x4(%rsp)
xor    %esi,%esi
mov    $0x4,%edx
call   1060 <memset@plt>
mov    %rsp,%rsi
mov    %ebx,%edi
mov    $0x10,%edx
call   1080 <connect@plt>
lea    0x10(%rsp),%r14
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0x400,%edx
xor    %ecx,%ecx
call   1030 <recv@plt>
lea    0xe12(%rip),%rdi
mov    %r14,%rsi
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x418,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@PF_INET = global i32 0
@SOCK_STREAM = global i32 0
@AF_INET = global i32 0
@.str = [10 x i8] c"127.0.0.1\00"
@.str.1 = [18 x i8] c"Data received: %s\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca [1024 x i8]
%4 = alloca %struct.sockaddr_in
%5 = alloca i32
store i32 0, i32* %1
%6 = load i32, i32* @PF_INET
%7 = load i32, i32* @SOCK_STREAM
%8 = call i32 @socket(i32 %6, i32 %7, i32 0)
store i32 %8, i32* %2
%9 = load i32, i32* @AF_INET
%10 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 3
store i32 %9, i32* %10
%11 = call i32 @htons(i32 7891)
%12 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 2
store i32 %11, i32* %12
%13 = call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%14 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 1
%15 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %14, i32 0, i32 0
store i32 %13, i32* %15
%16 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 0
%17 = load i32, i32* %16
%18 = call i32 @memset(i32 %17, i8 signext 0, i32 4)
store i32 16, i32* %5
%19 = load i32, i32* %2
%20 = bitcast %struct.sockaddr_in* %4 to %struct.sockaddr*
%21 = load i32, i32* %5
%22 = call i32 @connect(i32 %19, %struct.sockaddr* %20, i32 %21)
%23 = load i32, i32* %2
%24 = getelementptr inbounds [1024 x i8], [1024 x i8]* %3, i64 0, i64 0
%25 = call i32 @recv(i32 %23, i8* %24, i32 1024, i32 0)
%26 = getelementptr inbounds [1024 x i8], [1024 x i8]* %3, i64 0, i64 0
%27 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %26)
ret i32 0
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32, i32 }
%struct.TYPE_2__ = type { i32 }
%struct.sockaddr = type { i32 }
@PF_INET = global i32 0
@SOCK_STREAM = global i32 0
@AF_INET = global i32 0
@.str = [10 x i8] c"127.0.0.1\00"
@.str.1 = [18 x i8] c"Data received: %s\00"
define i32 @main() {
%1 = alloca [1024 x i8]
%2 = alloca %struct.sockaddr_in
%3 = getelementptr inbounds [1024 x i8], [1024 x i8]* %1, i64 0, i64 0
%4 = bitcast %struct.sockaddr_in* %2 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* %2, i64 0, i32 3
store i32 %8, i32* %9
%10 = tail call i32 @htons(i32 7891)
%11 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 2
store i32 %10, i32* %11
%12 = tail call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%13 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 1, i32 0
store i32 %12, i32* %13
%14 = tail call i32 @memset(i32 undef, i8 signext 0, i32 4)
%15 = bitcast %struct.sockaddr_in* %2 to %struct.sockaddr*
%16 = call i32 @connect(i32 %7, %struct.sockaddr* %15, i32 16)
%17 = call i32 @recv(i32 %7, i8* %3, i32 1024, i32 0)
%18 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0), i8* %3)
ret i32 0
}