#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*/ addr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ SOCK_STREAM;
int /*<<< orphan*/ assert(int);
scalar_t__ close(int);
int connect(int, struct sockaddr *, int);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_addr(char *);
int /*<<< orphan*/ memset(struct sockaddr_in *, int /*<<< orphan*/, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int main(int argc, char *argv[]) {
  int sd = socket(AF_INET, SOCK_STREAM, 0);
  assert(sd > 0);
  struct sockaddr_in addr;
  memset(&addr, 0, sizeof(addr));
  addr.sin_family = AF_INET;
  addr.sin_addr.s_addr = inet_addr("127.0.0.1");
  addr.sin_port = htons(80);
  int ret = connect(sd, (struct sockaddr *)&addr, sizeof(addr));
  return close(sd) && ret == 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    0x2e42(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0x14(%rbp)
cmpl   $0x0,-0x14(%rbp)
setg   %al
and    $0x1,%al
movzbl %al,%edi
call   1070 <assert@plt>
lea    -0x20(%rbp),%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    0x2e1e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x18(%rbp)
lea    0xe2a(%rip),%rdi
call   1060 <inet_addr@plt>
mov    %eax,-0x1c(%rbp)
mov    $0x50,%edi
call   1030 <htons@plt>
mov    %eax,-0x20(%rbp)
mov    -0x14(%rbp),%edi
lea    -0x20(%rbp),%rsi
mov    $0xc,%edx
call   1080 <connect@plt>
mov    %eax,-0x24(%rbp)
mov    -0x14(%rbp),%edi
call   1050 <close@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    $0x0,%rcx
mov    %al,-0x25(%rbp)
je     1223 <main+0xb3>
cmpl   $0x0,-0x24(%rbp)
sete   %al
mov    %al,-0x25(%rbp)
mov    -0x25(%rbp),%al
and    $0x1,%al
movzbl %al,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    0x2e69(%rip),%rbp
mov    0x0(%rbp),%edi
mov    0x2e4f(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
xor    %edi,%edi
test   %eax,%eax
setg   %dil
call   1070 <assert@plt>
mov    %rsp,%r14
mov    %r14,%rdi
xor    %esi,%esi
mov    $0xc,%edx
call   1040 <memset@plt>
mov    0x0(%rbp),%eax
mov    %eax,0x8(%rsp)
lea    0xe3f(%rip),%rdi
call   1060 <inet_addr@plt>
mov    %eax,0x4(%rsp)
mov    $0x50,%edi
call   1030 <htons@plt>
mov    %eax,(%rsp)
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   1080 <connect@plt>
mov    %eax,%ebp
mov    %ebx,%edi
call   1050 <close@plt>
test   %rax,%rax
setne  %al
test   %ebp,%ebp
sete   %cl
and    %al,%cl
movzbl %cl,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { 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 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca %struct.sockaddr_in
%8 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i32, i32* @AF_INET
%10 = load i32, i32* @SOCK_STREAM
%11 = call i32 @socket(i32 %9, i32 %10, i32 0)
store i32 %11, i32* %6
%12 = load i32, i32* %6
%13 = icmp sgt i32 %12, 0
%14 = zext i1 %13 to i32
%15 = call i32 @assert(i32 %14)
%16 = call i32 @memset(%struct.sockaddr_in* %7, i32 0, i32 12)
%17 = load i32, i32* @AF_INET
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 2
store i32 %17, i32* %18
%19 = call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%20 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 1
%21 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %20, i32 0, i32 0
store i32 %19, i32* %21
%22 = call i32 @htons(i32 80)
%23 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %7, i32 0, i32 0
store i32 %22, i32* %23
%24 = load i32, i32* %6
%25 = bitcast %struct.sockaddr_in* %7 to %struct.sockaddr*
%26 = call i32 @connect(i32 %24, %struct.sockaddr* %25, i32 12)
store i32 %26, i32* %8
%27 = load i32, i32* %6
%28 = call i64 @close(i32 %27)
%29 = icmp ne i64 %28, 0
br i1 %29, label %30, label %33
30: ; preds = %2
%31 = load i32, i32* %8
%32 = icmp eq i32 %31, 0
br label %33
33: ; preds = %30, %2
%34 = phi i1 [ false, %2 ], [ %32, %30 ]
%35 = zext i1 %34 to i32
ret i32 %35
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, %struct.TYPE_2__, i32 }
%struct.TYPE_2__ = type { 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 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca %struct.sockaddr_in
%4 = load i32, i32* @AF_INET
%5 = load i32, i32* @SOCK_STREAM
%6 = tail call i32 @socket(i32 %4, i32 %5, i32 0)
%7 = icmp sgt i32 %6, 0
%8 = zext i1 %7 to i32
%9 = tail call i32 @assert(i32 %8)
%10 = bitcast %struct.sockaddr_in* %3 to i8*
%11 = call i32 @memset(%struct.sockaddr_in* %3, i32 0, i32 12)
%12 = load i32, i32* @AF_INET
%13 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 2
store i32 %12, i32* %13
%14 = call i32 @inet_addr(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%15 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 1, i32 0
store i32 %14, i32* %15
%16 = call i32 @htons(i32 80)
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i64 0, i32 0
store i32 %16, i32* %17
%18 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%19 = call i32 @connect(i32 %6, %struct.sockaddr* %18, i32 12)
%20 = call i64 @close(i32 %6)
%21 = icmp ne i64 %20, 0
%22 = icmp eq i32 %19, 0
%23 = select i1 %21, i1 %22, i1 false
%24 = zext i1 %23 to i32
ret i32 %24
}