| //===- llvm/Codegen/LinkAllAsmWriterComponents.h ----------------*- C++ -*-===// | |
| // | |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |
| // See https://llvm.org/LICENSE.txt for license information. | |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
| // | |
| //===----------------------------------------------------------------------===// | |
| // | |
| // This header file pulls in all assembler writer related passes for tools like | |
| // llc that need this functionality. | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #ifndef LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H | |
| #define LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H | |
| #include "llvm/IR/BuiltinGCs.h" | |
| #include <cstdlib> | |
| namespace { | |
| struct ForceAsmWriterLinking { | |
| ForceAsmWriterLinking() { | |
| // We must reference the plug-ins in such a way that compilers will not | |
| // delete it all as dead code, even with whole program optimization, | |
| // yet is effectively a NO-OP. As the compiler isn't smart enough | |
| // to know that getenv() never returns -1, this will do the job. | |
| // This is so that globals in the translation units where these functions | |
| // are defined are forced to be initialized, populating various | |
| // registries. | |
| if (std::getenv("bar") != (char*) -1) | |
| return; | |
| llvm::linkOcamlGCPrinter(); | |
| llvm::linkErlangGCPrinter(); | |
| } | |
| } ForceAsmWriterLinking; // Force link by creating a global definition. | |
| } | |
| #endif // LLVM_CODEGEN_LINKALLASMWRITERCOMPONENTS_H |