1//===- llvm/Codegen/LinkAllAsmWriterComponents.h ----------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This header file pulls in all assembler writer related passes for tools like
10// llc that need this functionality.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
15#define LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
16
17#include "llvm/CodeGen/BuiltinGCs.h"
18#include <cstdlib>
19
20namespace {
21  struct ForceAsmWriterLinking {
22    ForceAsmWriterLinking() {
23      // We must reference the plug-ins in such a way that compilers will not
24      // delete it all as dead code, even with whole program optimization,
25      // yet is effectively a NO-OP. As the compiler isn't smart enough
26      // to know that getenv() never returns -1, this will do the job.
27      if (std::getenv("bar") != (char*) -1)
28        return;
29
30      llvm::linkOcamlGCPrinter();
31      llvm::linkErlangGCPrinter();
32
33    }
34  } ForceAsmWriterLinking; // Force link by creating a global definition.
35}
36
37#endif // LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H
38