| //===----- LinkAllIR.h - Reference All VMCore Code --------------*- 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 the object modules of the VMCore library so |
| // that tools like llc, opt, and lli can ensure they are linked with all symbols |
| // from libVMCore.a It should only be used from a tool's main program. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LINKALLIR_H |
| #define LLVM_LINKALLIR_H |
| |
| #include "llvm/BinaryFormat/Dwarf.h" |
| #include "llvm/IR/InlineAsm.h" |
| #include "llvm/IR/Instructions.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/IR/Verifier.h" |
| #include "llvm/Support/DynamicLibrary.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/Memory.h" |
| #include "llvm/Support/Mutex.h" |
| #include "llvm/Support/Path.h" |
| #include "llvm/Support/Process.h" |
| #include "llvm/Support/Program.h" |
| #include "llvm/Support/Signals.h" |
| #include <cstdlib> |
| |
| namespace { |
| struct ForceVMCoreLinking { |
| ForceVMCoreLinking() { |
| // We must reference VMCore 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::LLVMContext Context; |
| (void)new llvm::Module("", Context); |
| (void)new llvm::UnreachableInst(Context); |
| (void) llvm::createVerifierPass(); |
| } |
| } ForceVMCoreLinking; |
| } |
| |
| #endif |