#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 */

/* Variables and functions */
int atoi(char *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ run_server(int);
int setup_server(int);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  int parentfd;
  int portno;
  if (argc != 2) {
    fprintf(stderr, "usage: %s <port>\n", argv[0]);
    exit(1);
  }
  portno = atoi(argv[1]);
  parentfd = setup_server(portno);
  run_server(parentfd);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x4(%rbp)
je     118f <main+0x3f>
mov    0x2e70(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe80(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x18(%rbp)
mov    -0x18(%rbp),%edi
call   1040 <setup_server@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%edi
call   1030 <run_server@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jne    1171 <main+0x21>
mov    0x8(%rsi),%rdi
call   1060 <atoi@plt>
mov    %eax,%edi
call   1040 <setup_server@plt>
mov    %eax,%edi
call   1030 <run_server@plt>
xor    %eax,%eax
pop    %rcx
ret
mov    0x2e68(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe7c(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [18 x i8] c"usage: %s <port>\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca i32
%6 = alloca i32
store i32 %0, i32* %3
store i8** %1, i8*** %4
%7 = load i32, i32* %3
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %16
9: ; preds = %2
%10 = load i32, i32* @stderr
%11 = load i8**, i8*** %4
%12 = getelementptr inbounds i8*, i8** %11, i64 0
%13 = load i8*, i8** %12
%14 = call i32 @fprintf(i32 %10, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = call i32 @exit(i32 1)
unreachable
16: ; preds = %2
%17 = load i8**, i8*** %4
%18 = getelementptr inbounds i8*, i8** %17, i64 1
%19 = load i8*, i8** %18
%20 = call i32 @atoi(i8* %19)
store i32 %20, i32* %6
%21 = load i32, i32* %6
%22 = call i32 @setup_server(i32 %21)
store i32 %22, i32* %5
%23 = load i32, i32* %5
%24 = call i32 @run_server(i32 %23)
ret i32 0
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [18 x i8] c"usage: %s <port>\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %9, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 1)
unreachable
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = tail call i32 @atoi(i8* %11)
%13 = tail call i32 @setup_server(i32 %12)
%14 = tail call i32 @run_server(i32 %13)
ret i32 0
}