#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fdopen(int, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *);
void cannot_do(int fd) {
  FILE *fp = fdopen(fd, "w");
  fprintf(fp, "HTTP/1.0 501 Not Implemented\r\n");
  fprintf(fp, "Content-Type: text/plain\r\n");
  fprintf(fp, "\r\n");
  fprintf(fp, "That command is not yet implemented\r\n");
  fclose(fp);
}


x86 assembly (clang, -O0):
<cannot_do>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%edi
lea    0xebb(%rip),%rsi
call   1050 <fdopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xea9(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
lea    0xeb8(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
lea    0xea5(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
lea    0xeb3(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<cannot_do>:
push   %rbx
lea    0xec8(%rip),%rsi
call   1040 <fdopen@plt>
mov    %rax,%rbx
lea    0xebb(%rip),%rdi
mov    $0x1e,%esi
mov    $0x1,%edx
mov    %rax,%rcx
call   1050 <fwrite@plt>
lea    0xec1(%rip),%rdi
mov    $0x1a,%esi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1050 <fwrite@plt>
lea    0xea5(%rip),%rdi
mov    $0x2,%esi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1050 <fwrite@plt>
lea    0xeaa(%rip),%rdi
mov    $0x25,%esi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1050 <fwrite@plt>
mov    %rbx,%rdi
pop    %rbx
jmp    1030 <fclose@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"w\00"
@.str.1 = [31 x i8] c"HTTP/1.0 501 Not Implemented\0D\0A\00"
@.str.2 = [27 x i8] c"Content-Type: text/plain\0D\0A\00"
@.str.3 = [3 x i8] c"\0D\0A\00"
@.str.4 = [38 x i8] c"That command is not yet implemented\0D\0A\00"
define void @cannot_do(i32 %0) {
%2 = alloca i32
%3 = alloca i32*
store i32 %0, i32* %2
%4 = load i32, i32* %2
%5 = call i32* @fdopen(i32 %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %5, i32** %3
%6 = load i32*, i32** %3
%7 = call i32 @fprintf(i32* %6, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.1, i64 0, i64 0))
%8 = load i32*, i32** %3
%9 = call i32 @fprintf(i32* %8, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0))
%10 = load i32*, i32** %3
%11 = call i32 @fprintf(i32* %10, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%12 = load i32*, i32** %3
%13 = call i32 @fprintf(i32* %12, i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.4, i64 0, i64 0))
%14 = load i32*, i32** %3
%15 = call i32 @fclose(i32* %14)
ret void
}

LLVM IR (-O2):
@.str = [2 x i8] c"w\00"
@.str.1 = [31 x i8] c"HTTP/1.0 501 Not Implemented\0D\0A\00"
@.str.2 = [27 x i8] c"Content-Type: text/plain\0D\0A\00"
@.str.3 = [3 x i8] c"\0D\0A\00"
@.str.4 = [38 x i8] c"That command is not yet implemented\0D\0A\00"
define void @cannot_do(i32 %0) {
%2 = tail call i32* @fdopen(i32 %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = tail call i64 @fwrite(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.1, i64 0, i64 0), i64 30, i64 1, i32* %2)
%4 = tail call i64 @fwrite(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.2, i64 0, i64 0), i64 26, i64 1, i32* %2)
%5 = tail call i64 @fwrite(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i64 2, i64 1, i32* %2)
%6 = tail call i64 @fwrite(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.4, i64 0, i64 0), i64 37, i64 1, i32* %2)
%7 = tail call i32 @fclose(i32* %2)
ret void
}