#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 *, int);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_pton(int /*<<< orphan*/, char *, int /*<<< orphan*/ *);
int /*<<< orphan*/ memset(struct sockaddr_in *, int /*<<< orphan*/, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int login() {
  int fd_socket;
  struct sockaddr_in servaddr;
  fd_socket = socket(AF_INET, SOCK_STREAM, 0);
  memset(&servaddr, 0, sizeof(servaddr));
  servaddr.sin_family = AF_INET;
  servaddr.sin_port = htons(4004);
  inet_pton(AF_INET, "127.0.0.1", &(servaddr.sin_addr));
  connect(fd_socket, (struct sockaddr *)&servaddr, sizeof(servaddr));
  return fd_socket;
}


x86 assembly (clang, -O0):
<login>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    0x2e89(%rip),%rax
mov    (%rax),%edi
mov    0x2e70(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1070 <socket@plt>
mov    %eax,-0x4(%rbp)
lea    -0x10(%rbp),%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    0x2e5d(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x8(%rbp)
mov    $0xfa4,%edi
call   1030 <htons@plt>
mov    %eax,-0xc(%rbp)
mov    0x2e44(%rip),%rax
mov    (%rax),%edi
lea    -0x10(%rbp),%rdx
lea    0xe4f(%rip),%rsi
call   1050 <inet_pton@plt>
mov    -0x4(%rbp),%edi
lea    -0x10(%rbp),%rsi
mov    $0xc,%edx
call   1060 <connect@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<login>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    0x2e88(%rip),%r15
mov    (%r15),%edi
mov    0x2e6e(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1070 <socket@plt>
mov    %eax,%ebx
mov    %rsp,%r14
mov    %r14,%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    (%r15),%eax
mov    %eax,0x8(%rsp)
mov    $0xfa4,%edi
call   1030 <htons@plt>
mov    %eax,0x4(%rsp)
mov    (%r15),%edi
lea    0xe5a(%rip),%rsi
mov    %r14,%rdx
call   1050 <inet_pton@plt>
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   1060 <connect@plt>
mov    %ebx,%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 = [10 x i8] c"127.0.0.1\00"
define i32 @login() {
%1 = alloca i32
%2 = alloca %struct.sockaddr_in
%3 = load i32, i32* @AF_INET
%4 = load i32, i32* @SOCK_STREAM
%5 = call i32 @socket(i32 %3, i32 %4, i32 0)
store i32 %5, i32* %1
%6 = call i32 @memset(%struct.sockaddr_in* %2, i32 0, i32 12)
%7 = load i32, i32* @AF_INET
%8 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i32 0, i32 2
store i32 %7, i32* %8
%9 = call i32 @htons(i32 4004)
%10 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i32 0, i32 1
store i32 %9, i32* %10
%11 = load i32, i32* @AF_INET
%12 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i32 0, i32 0
%13 = call i32 @inet_pton(i32 %11, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i32* %12)
%14 = load i32, i32* %1
%15 = bitcast %struct.sockaddr_in* %2 to %struct.sockaddr*
%16 = call i32 @connect(i32 %14, %struct.sockaddr* %15, i32 12)
%17 = load i32, i32* %1
ret i32 %17
}

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 = [10 x i8] c"127.0.0.1\00"
define i32 @login() {
%1 = alloca %struct.sockaddr_in
%2 = bitcast %struct.sockaddr_in* %1 to i8*
%3 = load i32, i32* @AF_INET
%4 = load i32, i32* @SOCK_STREAM
%5 = tail call i32 @socket(i32 %3, i32 %4, i32 0)
%6 = call i32 @memset(%struct.sockaddr_in* %1, i32 0, i32 12)
%7 = load i32, i32* @AF_INET
%8 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 2
store i32 %7, i32* %8
%9 = call i32 @htons(i32 4004)
%10 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 1
store i32 %9, i32* %10
%11 = load i32, i32* @AF_INET
%12 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 0
%13 = call i32 @inet_pton(i32 %11, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i32* %12)
%14 = bitcast %struct.sockaddr_in* %1 to %struct.sockaddr*
%15 = call i32 @connect(i32 %5, %struct.sockaddr* %14, i32 12)
ret i32 %5
}