| //===-- JIT.h - Abstract Execution Engine Interface -------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file forces the JIT to link in on certain operating systems. |
| // (Windows). |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_EXECUTIONENGINE_JIT_H |
| #define LLVM_EXECUTIONENGINE_JIT_H |
| |
| #include "llvm/ExecutionEngine/ExecutionEngine.h" |
| #include <cstdlib> |
| |
| extern "C" void LLVMLinkInJIT(); |
| |
| namespace { |
| struct ForceJITLinking { |
| ForceJITLinking() { |
| // We must reference JIT 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. |
| if (std::getenv("bar") != (char*) -1) |
| return; |
| |
| LLVMLinkInJIT(); |
| } |
| } ForceJITLinking; |
| } |
| |
| #endif |
