#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 /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ send(int, char *, int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ strcpy(char *, char *);
int /*<<< orphan*/ strlen(char *);
void header(int client, const char *filename) {
  char buf[1024];
  (void)filename;
  strcpy(buf, "HTTP/1.0 200 OK\r\n");
  send(client, buf, strlen(buf), 0);
  strcpy(buf, "Server: httpd/0.1.0\r\n");
  send(client, buf, strlen(buf), 0);
  strcpy(buf, "Content-Type: text/html\r\n");
  send(client, buf, strlen(buf), 0);
  strcpy(buf, "\r\n");
  send(client, buf, strlen(buf), 0);
  printf("send head\n");
}


x86 assembly (clang, -O0):
<header>:
push   %rbp
mov    %rsp,%rbp
sub    $0x450,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
lea    -0x410(%rbp),%rdi
lea    0xea0(%rip),%rsi
call   1030 <strcpy@plt>
mov    -0x4(%rbp),%eax
mov    %eax,-0x44c(%rbp)
lea    -0x410(%rbp),%rax
mov    %rax,-0x448(%rbp)
lea    -0x410(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x44c(%rbp),%edi
mov    -0x448(%rbp),%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    -0x410(%rbp),%rdi
lea    0xe66(%rip),%rsi
call   1030 <strcpy@plt>
mov    -0x4(%rbp),%eax
mov    %eax,-0x43c(%rbp)
lea    -0x410(%rbp),%rax
mov    %rax,-0x438(%rbp)
lea    -0x410(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x43c(%rbp),%edi
mov    -0x438(%rbp),%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    -0x410(%rbp),%rdi
lea    0xe30(%rip),%rsi
call   1030 <strcpy@plt>
mov    -0x4(%rbp),%eax
mov    %eax,-0x42c(%rbp)
lea    -0x410(%rbp),%rax
mov    %rax,-0x428(%rbp)
lea    -0x410(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x42c(%rbp),%edi
mov    -0x428(%rbp),%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    -0x410(%rbp),%rdi
lea    0xde1(%rip),%rsi
call   1030 <strcpy@plt>
mov    -0x4(%rbp),%eax
mov    %eax,-0x41c(%rbp)
lea    -0x410(%rbp),%rax
mov    %rax,-0x418(%rbp)
lea    -0x410(%rbp),%rdi
call   1040 <strlen@plt>
mov    -0x41c(%rbp),%edi
mov    -0x418(%rbp),%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    0xdb9(%rip),%rdi
call   1060 <printf@plt>
add    $0x450,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<header>:
push   %rbp
push   %rbx
sub    $0x408,%rsp
mov    %edi,%ebp
lea    0xeae(%rip),%rsi
mov    %rsp,%rbx
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1050 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1060 <send@plt>
lea    0xe98(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1050 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1060 <send@plt>
lea    0xe89(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1050 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1060 <send@plt>
lea    0xe61(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1050 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1060 <send@plt>
lea    0xe59(%rip),%rdi
call   1040 <puts@plt>
add    $0x408,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [18 x i8] c"HTTP/1.0 200 OK\0D\0A\00"
@.str.1 = [22 x i8] c"Server: httpd/0.1.0\0D\0A\00"
@.str.2 = [26 x i8] c"Content-Type: text/html\0D\0A\00"
@.str.3 = [3 x i8] c"\0D\0A\00"
@.str.4 = [11 x i8] c"send head\0A\00"
define void @header(i32 %0, i8* %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca [1024 x i8]
store i32 %0, i32* %3
store i8* %1, i8** %4
%6 = load i8*, i8** %4
%7 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%8 = call i32 @strcpy(i8* %7, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%9 = load i32, i32* %3
%10 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%11 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%12 = call i32 @strlen(i8* %11)
%13 = call i32 @send(i32 %9, i8* %10, i32 %12, i32 0)
%14 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%15 = call i32 @strcpy(i8* %14, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0))
%16 = load i32, i32* %3
%17 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%18 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%19 = call i32 @strlen(i8* %18)
%20 = call i32 @send(i32 %16, i8* %17, i32 %19, i32 0)
%21 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%22 = call i32 @strcpy(i8* %21, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
%23 = load i32, i32* %3
%24 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%25 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%26 = call i32 @strlen(i8* %25)
%27 = call i32 @send(i32 %23, i8* %24, i32 %26, i32 0)
%28 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%29 = call i32 @strcpy(i8* %28, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%30 = load i32, i32* %3
%31 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%32 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%33 = call i32 @strlen(i8* %32)
%34 = call i32 @send(i32 %30, i8* %31, i32 %33, i32 0)
%35 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [18 x i8] c"HTTP/1.0 200 OK\0D\0A\00"
@.str.1 = [22 x i8] c"Server: httpd/0.1.0\0D\0A\00"
@.str.2 = [26 x i8] c"Content-Type: text/html\0D\0A\00"
@.str.3 = [3 x i8] c"\0D\0A\00"
@str = [10 x i8] c"send head\00"
define void @header(i32 %0, i8* nocapture readnone %1) {
%3 = alloca [1024 x i8]
%4 = getelementptr inbounds [1024 x i8], [1024 x i8]* %3, i64 0, i64 0
%5 = call i32 @strcpy(i8* %4, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @strlen(i8* %4)
%7 = call i32 @send(i32 %0, i8* %4, i32 %6, i32 0)
%8 = call i32 @strcpy(i8* %4, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.1, i64 0, i64 0))
%9 = call i32 @strlen(i8* %4)
%10 = call i32 @send(i32 %0, i8* %4, i32 %9, i32 0)
%11 = call i32 @strcpy(i8* %4, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
%12 = call i32 @strlen(i8* %4)
%13 = call i32 @send(i32 %0, i8* %4, i32 %12, i32 0)
%14 = call i32 @strcpy(i8* %4, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%15 = call i32 @strlen(i8* %4)
%16 = call i32 @send(i32 %0, i8* %4, i32 %15, i32 0)
%17 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str, i64 0, i64 0))
ret void
}