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


x86 assembly (clang, -O0):
<headers>:
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    0xe34(%rip),%rsi
call   1060 <sprintf@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    0xde5(%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>
add    $0x450,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<headers>:
push   %rbp
push   %rbx
sub    $0x408,%rsp
mov    %edi,%ebp
lea    0xebe(%rip),%rsi
mov    %rsp,%rbx
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    0xea8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
movups 0xe9d(%rip),%xmm0
movaps %xmm0,(%rsp)
movups 0xe9c(%rip),%xmm0
movups %xmm0,0xa(%rsp)
mov    %rbx,%rdi
call   1040 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@plt>
lea    0xe6d(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcpy@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
mov    %ebp,%edi
mov    %rbx,%rsi
mov    %eax,%edx
xor    %ecx,%ecx
call   1050 <send@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 = [26 x i8] c"Server: tinyhttpd/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"
define void @headers(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 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%7 = call i32 @strcpy(i8* %6, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%8 = load i32, i32* %3
%9 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%10 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%11 = call i32 @strlen(i8* %10)
%12 = call i32 @send(i32 %8, i8* %9, i32 %11, i32 0)
%13 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%14 = call i32 @strcpy(i8* %13, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.1, i64 0, i64 0))
%15 = load i32, i32* %3
%16 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%17 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%18 = call i32 @strlen(i8* %17)
%19 = call i32 @send(i32 %15, i8* %16, i32 %18, i32 0)
%20 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%21 = call i32 @sprintf(i8* %20, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
%22 = load i32, i32* %3
%23 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%24 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%25 = call i32 @strlen(i8* %24)
%26 = call i32 @send(i32 %22, i8* %23, i32 %25, i32 0)
%27 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%28 = call i32 @strcpy(i8* %27, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%29 = load i32, i32* %3
%30 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%31 = getelementptr inbounds [1024 x i8], [1024 x i8]* %5, i64 0, i64 0
%32 = call i32 @strlen(i8* %31)
%33 = call i32 @send(i32 %29, i8* %30, i32 %32, i32 0)
ret void
}

LLVM IR (-O2):
@.str = [18 x i8] c"HTTP/1.0 200 OK\0D\0A\00"
@.str.1 = [26 x i8] c"Server: tinyhttpd/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"
define void @headers(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 ([26 x i8], [26 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 @strlen(i8* %4)
%12 = call i32 @send(i32 %0, i8* %4, i32 %11, i32 0)
%13 = call i32 @strcpy(i8* %4, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%14 = call i32 @strlen(i8* %4)
%15 = call i32 @send(i32 %0, i8* %4, i32 %14, i32 0)
ret void
}