#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*/ addr;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ IPPROTO_TCP;
int /*<<< orphan*/ SOCK_STREAM;
scalar_t__ connect(int, struct sockaddr *, int);
int /*<<< orphan*/ errno;
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ htons(int);
int /*<<< orphan*/ inet_aton(char *, int /*<<< orphan*/ *);
scalar_t__ sockatmark(int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int main(void) {
  int sock;
  if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
    fprintf(stderr, "socket() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  struct sockaddr_in addr;
  addr.sin_family = AF_INET;
  addr.sin_port = htons(8000);
  inet_aton("127.0.0.1", &addr.sin_addr);
  if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
    fprintf(stderr, "connect() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  if (sockatmark(sock) < 0) {
    fprintf(stderr, "sockatmark() failed: %s\n.", strerror(errno));
    return (EXIT_FAILURE);
  }
  return (EXIT_SUCCESS);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    0x2e62(%rip),%rax
mov    (%rax),%edi
mov    0x2e39(%rip),%rax
mov    (%rax),%esi
mov    0x2e48(%rip),%rax
mov    (%rax),%edx
call   1090 <socket@plt>
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
jge    11e8 <main+0x78>
mov    0x2e1e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    0x2e02(%rip),%rax
mov    (%rax),%edi
call   1080 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    %rax,%rdx
lea    0xe2e(%rip),%rsi
call   1050 <fprintf@plt>
mov    0x2dda(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    12c4 <main+0x154>
mov    0x2df9(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x10(%rbp)
mov    $0x1f40,%edi
call   1040 <htons@plt>
mov    %eax,-0x14(%rbp)
lea    -0x18(%rbp),%rsi
lea    0xe0a(%rip),%rdi
call   1060 <inet_aton@plt>
mov    -0x8(%rbp),%edi
lea    -0x18(%rbp),%rsi
mov    $0xc,%edx
call   1070 <connect@plt>
cmp    $0x0,%rax
jge    1269 <main+0xf9>
mov    0x2d9d(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x20(%rbp)
mov    0x2d81(%rip),%rax
mov    (%rax),%edi
call   1080 <strerror@plt>
mov    -0x20(%rbp),%edi
mov    %rax,%rdx
lea    0xdcd(%rip),%rsi
call   1050 <fprintf@plt>
mov    0x2d59(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    12c4 <main+0x154>
mov    -0x8(%rbp),%edi
call   1030 <sockatmark@plt>
cmp    $0x0,%rax
jge    12b8 <main+0x148>
mov    0x2d4e(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x24(%rbp)
mov    0x2d32(%rip),%rax
mov    (%rax),%edi
call   1080 <strerror@plt>
mov    -0x24(%rbp),%edi
mov    %rax,%rdx
lea    0xd95(%rip),%rsi
call   1050 <fprintf@plt>
mov    0x2d0a(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    12c4 <main+0x154>
mov    0x2cf1(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%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    0x2e3f(%rip),%rax
mov    (%rax),%esi
mov    0x2e4e(%rip),%rax
mov    (%rax),%edx
call   1090 <socket@plt>
test   %eax,%eax
js     11ef <main+0x7f>
mov    %eax,%ebx
mov    0x0(%rbp),%eax
mov    %eax,0x8(%rsp)
mov    $0x1f40,%edi
call   1040 <htons@plt>
mov    %eax,0x4(%rsp)
lea    0xe5b(%rip),%rdi
mov    %rsp,%r14
mov    %r14,%rsi
call   1060 <inet_aton@plt>
mov    %ebx,%edi
mov    %r14,%rsi
mov    $0xc,%edx
call   1070 <connect@plt>
test   %rax,%rax
js     1211 <main+0xa1>
mov    %ebx,%edi
call   1030 <sockatmark@plt>
test   %rax,%rax
js     121a <main+0xaa>
mov    0x2dc3(%rip),%rax
jmp    124c <main+0xdc>
mov    0x2dda(%rip),%rax
mov    (%rax),%ebx
mov    0x2dc1(%rip),%rax
mov    (%rax),%edi
call   1080 <strerror@plt>
lea    0xdf3(%rip),%rsi
mov    %ebx,%edi
jmp    123d <main+0xcd>
lea    0xe08(%rip),%rbx
jmp    1221 <main+0xb1>
lea    0xe16(%rip),%rbx
mov    0x2da8(%rip),%rax
mov    (%rax),%ebp
mov    0x2d8f(%rip),%rax
mov    (%rax),%edi
call   1080 <strerror@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %rax,%rdx
call   1050 <fprintf@plt>
mov    0x2d6c(%rip),%rax
mov    (%rax),%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
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
@IPPROTO_TCP = global i32 0
@stderr = global i32 0
@.str = [22 x i8] c"socket() failed: %s\0A.\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [23 x i8] c"connect() failed: %s\0A.\00"
@.str.3 = [26 x i8] c"sockatmark() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca %struct.sockaddr_in
store i32 0, i32* %1
%4 = load i32, i32* @AF_INET
%5 = load i32, i32* @SOCK_STREAM
%6 = load i32, i32* @IPPROTO_TCP
%7 = call i32 @socket(i32 %4, i32 %5, i32 %6)
store i32 %7, i32* %2
%8 = icmp slt i32 %7, 0
br i1 %8, label %9, label %15
9: ; preds = %0
%10 = load i32, i32* @stderr
%11 = load i32, i32* @errno
%12 = call i8* @strerror(i32 %11)
%13 = call i32 @fprintf(i32 %10, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = load i32, i32* @EXIT_FAILURE
store i32 %14, i32* %1
br label %44
15: ; preds = %0
%16 = load i32, i32* @AF_INET
%17 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 2
store i32 %16, i32* %17
%18 = call i32 @htons(i32 8000)
%19 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 1
store i32 %18, i32* %19
%20 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %3, i32 0, i32 0
%21 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %20)
%22 = load i32, i32* %2
%23 = bitcast %struct.sockaddr_in* %3 to %struct.sockaddr*
%24 = call i64 @connect(i32 %22, %struct.sockaddr* %23, i32 12)
%25 = icmp slt i64 %24, 0
br i1 %25, label %26, label %32
26: ; preds = %15
%27 = load i32, i32* @stderr
%28 = load i32, i32* @errno
%29 = call i8* @strerror(i32 %28)
%30 = call i32 @fprintf(i32 %27, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0), i8* %29)
%31 = load i32, i32* @EXIT_FAILURE
store i32 %31, i32* %1
br label %44
32: ; preds = %15
%33 = load i32, i32* %2
%34 = call i64 @sockatmark(i32 %33)
%35 = icmp slt i64 %34, 0
br i1 %35, label %36, label %42
36: ; preds = %32
%37 = load i32, i32* @stderr
%38 = load i32, i32* @errno
%39 = call i8* @strerror(i32 %38)
%40 = call i32 @fprintf(i32 %37, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), i8* %39)
%41 = load i32, i32* @EXIT_FAILURE
store i32 %41, i32* %1
br label %44
42: ; preds = %32
%43 = load i32, i32* @EXIT_SUCCESS
store i32 %43, i32* %1
br label %44
44: ; preds = %42, %36, %26, %9
%45 = load i32, i32* %1
ret i32 %45
}

LLVM IR (-O2):
%struct.sockaddr_in = type { i32, i32, i32 }
%struct.sockaddr = type { i32 }
@AF_INET = global i32 0
@SOCK_STREAM = global i32 0
@IPPROTO_TCP = global i32 0
@stderr = global i32 0
@.str = [22 x i8] c"socket() failed: %s\0A.\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
@.str.1 = [10 x i8] c"127.0.0.1\00"
@.str.2 = [23 x i8] c"connect() failed: %s\0A.\00"
@.str.3 = [26 x i8] c"sockatmark() failed: %s\0A.\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca %struct.sockaddr_in
%2 = load i32, i32* @AF_INET
%3 = load i32, i32* @SOCK_STREAM
%4 = load i32, i32* @IPPROTO_TCP
%5 = tail call i32 @socket(i32 %2, i32 %3, i32 %4)
%6 = icmp slt i32 %5, 0
br i1 %6, label %7, label %13
7: ; preds = %0
%8 = load i32, i32* @stderr
%9 = load i32, i32* @errno
%10 = tail call i8* @strerror(i32 %9)
%11 = tail call i32 @fprintf(i32 %8, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %10)
%12 = load i32, i32* @EXIT_FAILURE
br label %36
13: ; preds = %0
%14 = bitcast %struct.sockaddr_in* %1 to i8*
%15 = load i32, i32* @AF_INET
%16 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 2
store i32 %15, i32* %16
%17 = tail call i32 @htons(i32 8000)
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 1
store i32 %17, i32* %18
%19 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %1, i64 0, i32 0
%20 = call i32 @inet_aton(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.1, i64 0, i64 0), i32* %19)
%21 = bitcast %struct.sockaddr_in* %1 to %struct.sockaddr*
%22 = call i64 @connect(i32 %5, %struct.sockaddr* %21, i32 12)
%23 = icmp slt i64 %22, 0
br i1 %23, label %27, label %24
24: ; preds = %13
%25 = call i64 @sockatmark(i32 %5)
%26 = icmp slt i64 %25, 0
br i1 %26, label %27, label %33
27: ; preds = %24, %13
%28 = phi i8* [ getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0), %13 ], [ getelementptr inbounds ([26 x i8], [26 x i8]* @.str.3, i64 0, i64 0), %24 ]
%29 = load i32, i32* @stderr
%30 = load i32, i32* @errno
%31 = call i8* @strerror(i32 %30)
%32 = call i32 @fprintf(i32 %29, i8* %28, i8* %31)
br label %33
33: ; preds = %27, %24
%34 = phi i32* [ @EXIT_SUCCESS, %24 ], [ @EXIT_FAILURE, %27 ]
%35 = load i32, i32* %34
br label %36
36: ; preds = %33, %7
%37 = phi i32 [ %12, %7 ], [ %35, %33 ]
ret i32 %37
}