| //===-- MCJIT.h - MC-Based Just-In-Time Execution Engine --------*- 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 file forces the MCJIT to link in on certain operating systems. |
| // (Windows). |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_EXECUTIONENGINE_MCJIT_H |
| #define LLVM_EXECUTIONENGINE_MCJIT_H |
| |
| #include "llvm/ExecutionEngine/ExecutionEngine.h" |
| #include <cstdlib> |
| |
| extern "C" void LLVMLinkInMCJIT(); |
| |
| namespace { |
| struct ForceMCJITLinking { |
| ForceMCJITLinking() { |
| // We must reference MCJIT 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; |
| |
| LLVMLinkInMCJIT(); |
| } |
| } ForceMCJITLinking; |
| } |
| |
| #endif |