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/IR/BuiltinGCs.h" |
18 | #include <cstdlib> |
19 | |
20 | namespace { |
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 | // This is so that globals in the translation units where these functions |
28 | // are defined are forced to be initialized, populating various |
29 | // registries. |
30 | if (std::getenv(name: "bar" ) != (char*) -1) |
31 | return; |
32 | |
33 | llvm::linkOcamlGCPrinter(); |
34 | llvm::linkErlangGCPrinter(); |
35 | |
36 | } |
37 | } ForceAsmWriterLinking; // Force link by creating a global definition. |
38 | } |
39 | |
40 | #endif // LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H |
41 | |