#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 */
typedef int /*<<< orphan*/ u_short;
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*/ name;

/* Variables and functions */
int /*<<< orphan*/ AF_INET;
int /*<<< orphan*/ INADDR_ANY;
int /*<<< orphan*/ SOCK_STREAM;
scalar_t__ bind(int, struct sockaddr *, int);
int /*<<< orphan*/ bzero(struct sockaddr_in *, int);
int /*<<< orphan*/ error_die(char *);
int /*<<< orphan*/ htonl(int /*<<< orphan*/);
int /*<<< orphan*/ htons(int /*<<< orphan*/);
scalar_t__ listen(int, int);
int socket(int /*<<< orphan*/, int /*<<< orphan*/, int /*<<< orphan*/);
int startup(u_short port) {
  int httpd;
  struct sockaddr_in name;
  httpd = socket(AF_INET, SOCK_STREAM, 0);
  if (httpd < 0)
    error_die("socket");
  bzero(&name, sizeof(name));
  name.sin_family = AF_INET;
  name.sin_addr.s_addr = htonl(INADDR_ANY);
  name.sin_port = htons(port);
  if (bind(httpd, (struct sockaddr *)&name, sizeof(name)) < 0)
    error_die("bind");
  if (listen(httpd, 5) < 0)
    error_die("listen");
  return (httpd);
}


x86 assembly (clang, -O0):
<startup>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    0x2e66(%rip),%rax
mov    (%rax),%edi
mov    0x2e45(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jge    11ad <startup+0x3d>
lea    0xe58(%rip),%rdi
call   1050 <error_die@plt>
lea    -0x18(%rbp),%rdi
mov    $0xc,%esi
call   1080 <bzero@plt>
mov    0x2e26(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x10(%rbp)
mov    0x2e12(%rip),%rax
mov    (%rax),%edi
call   1040 <htonl@plt>
mov    %eax,-0x14(%rbp)
mov    -0x4(%rbp),%edi
call   1030 <htons@plt>
mov    %eax,-0x18(%rbp)
mov    -0x8(%rbp),%edi
lea    -0x18(%rbp),%rsi
mov    $0xc,%edx
call   1070 <bind@plt>
cmp    $0x0,%rax
jge    120a <startup+0x9a>
lea    0xe02(%rip),%rdi
call   1050 <error_die@plt>
mov    -0x8(%rbp),%edi
mov    $0x5,%esi
call   1060 <listen@plt>
cmp    $0x0,%rax
jge    122d <startup+0xbd>
lea    0xde4(%rip),%rdi
call   1050 <error_die@plt>
mov    -0x8(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<startup>:
push   %rbp
push   %r15
push   %r14
push   %rbx
sub    $0x18,%rsp
mov    %edi,%r14d
mov    0x2e64(%rip),%r15
mov    (%r15),%edi
mov    0x2e42(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1090 <socket@plt>
mov    %eax,%ebx
test   %eax,%eax
jns    11a9 <startup+0x39>
lea    0xe5c(%rip),%rdi
call   1050 <error_die@plt>
lea    0x8(%rsp),%rbp
mov    %rbp,%rdi
mov    $0xc,%esi
call   1080 <bzero@plt>
mov    (%r15),%eax
mov    %eax,0x10(%rsp)
mov    0x2e17(%rip),%rax
mov    (%rax),%edi
call   1040 <htonl@plt>
mov    %eax,0xc(%rsp)
mov    %r14d,%edi
call   1030 <htons@plt>
mov    %eax,0x8(%rsp)
mov    %ebx,%edi
mov    %rbp,%rsi
mov    $0xc,%edx
call   1070 <bind@plt>
test   %rax,%rax
jns    1200 <startup+0x90>
lea    0xe0c(%rip),%rdi
call   1050 <error_die@plt>
mov    %ebx,%edi
mov    $0x5,%esi
call   1060 <listen@plt>
test   %rax,%rax
jns    121d <startup+0xad>
lea    0xdf4(%rip),%rdi
call   1050 <error_die@plt>
mov    %ebx,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r14
pop    %r15
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 = [7 x i8] c"socket\00"
@INADDR_ANY = global i32 0
@.str.1 = [5 x i8] c"bind\00"
@.str.2 = [7 x i8] c"listen\00"
define i32 @startup(i32 %0) {
%2 = alloca i32
%3 = alloca i32
%4 = alloca %struct.sockaddr_in
store i32 %0, i32* %2
%5 = load i32, i32* @AF_INET
%6 = load i32, i32* @SOCK_STREAM
%7 = call i32 @socket(i32 %5, i32 %6, i32 0)
store i32 %7, i32* %3
%8 = load i32, i32* %3
%9 = icmp slt i32 %8, 0
br i1 %9, label %10, label %12
10: ; preds = %1
%11 = call i32 @error_die(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
br label %12
12: ; preds = %10, %1
%13 = call i32 @bzero(%struct.sockaddr_in* %4, i32 12)
%14 = load i32, i32* @AF_INET
%15 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 2
store i32 %14, i32* %15
%16 = load i32, i32* @INADDR_ANY
%17 = call i32 @htonl(i32 %16)
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 1
%19 = getelementptr inbounds %struct.TYPE_2__, %struct.TYPE_2__* %18, i32 0, i32 0
store i32 %17, i32* %19
%20 = load i32, i32* %2
%21 = call i32 @htons(i32 %20)
%22 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %4, i32 0, i32 0
store i32 %21, i32* %22
%23 = load i32, i32* %3
%24 = bitcast %struct.sockaddr_in* %4 to %struct.sockaddr*
%25 = call i64 @bind(i32 %23, %struct.sockaddr* %24, i32 12)
%26 = icmp slt i64 %25, 0
br i1 %26, label %27, label %29
27: ; preds = %12
%28 = call i32 @error_die(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
br label %29
29: ; preds = %27, %12
%30 = load i32, i32* %3
%31 = call i64 @listen(i32 %30, i32 5)
%32 = icmp slt i64 %31, 0
br i1 %32, label %33, label %35
33: ; preds = %29
%34 = call i32 @error_die(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0))
br label %35
35: ; preds = %33, %29
%36 = load i32, i32* %3
ret i32 %36
}

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 = [7 x i8] c"socket\00"
@INADDR_ANY = global i32 0
@.str.1 = [5 x i8] c"bind\00"
@.str.2 = [7 x i8] c"listen\00"
define i32 @startup(i32 %0) {
%2 = alloca %struct.sockaddr_in
%3 = bitcast %struct.sockaddr_in* %2 to i8*
%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 slt i32 %6, 0
br i1 %7, label %8, label %10
8: ; preds = %1
%9 = tail call i32 @error_die(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
br label %10
10: ; preds = %8, %1
%11 = call i32 @bzero(%struct.sockaddr_in* %2, i32 12)
%12 = load i32, i32* @AF_INET
%13 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 2
store i32 %12, i32* %13
%14 = load i32, i32* @INADDR_ANY
%15 = tail call i32 @htonl(i32 %14)
%16 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 1, i32 0
store i32 %15, i32* %16
%17 = tail call i32 @htons(i32 %0)
%18 = getelementptr inbounds %struct.sockaddr_in, %struct.sockaddr_in* %2, i64 0, i32 0
store i32 %17, i32* %18
%19 = bitcast %struct.sockaddr_in* %2 to %struct.sockaddr*
%20 = call i64 @bind(i32 %6, %struct.sockaddr* %19, i32 12)
%21 = icmp slt i64 %20, 0
br i1 %21, label %22, label %24
22: ; preds = %10
%23 = call i32 @error_die(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
br label %24
24: ; preds = %22, %10
%25 = call i64 @listen(i32 %6, i32 5)
%26 = icmp slt i64 %25, 0
br i1 %26, label %27, label %29
27: ; preds = %24
%28 = call i32 @error_die(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0))
br label %29
29: ; preds = %27, %24
ret i32 %6
}