1//===----- LinkAllIR.h - Reference All VMCore Code --------------*- 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 the object modules of the VMCore library so 10// that tools like llc, opt, and lli can ensure they are linked with all symbols 11// from libVMCore.a It should only be used from a tool's main program. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_LINKALLIR_H 16#define LLVM_LINKALLIR_H 17 18#include "llvm/BinaryFormat/Dwarf.h" 19#include "llvm/IR/InlineAsm.h" 20#include "llvm/IR/Instructions.h" 21#include "llvm/IR/LLVMContext.h" 22#include "llvm/IR/Module.h" 23#include "llvm/IR/Verifier.h" 24#include "llvm/Support/DynamicLibrary.h" 25#include "llvm/Support/MathExtras.h" 26#include "llvm/Support/Memory.h" 27#include "llvm/Support/Mutex.h" 28#include "llvm/Support/Path.h" 29#include "llvm/Support/Process.h" 30#include "llvm/Support/Program.h" 31#include "llvm/Support/Signals.h" 32#include <cstdlib> 33 34namespace { 35 struct ForceVMCoreLinking { 36 ForceVMCoreLinking() { 37 // We must reference VMCore in such a way that compilers will not 38 // delete it all as dead code, even with whole program optimization, 39 // yet is effectively a NO-OP. As the compiler isn't smart enough 40 // to know that getenv() never returns -1, this will do the job. 41 if (std::getenv("bar") != (char*) -1) 42 return; 43 llvm::LLVMContext Context; 44 (void)new llvm::Module("", Context); 45 (void)new llvm::UnreachableInst(Context); 46 (void) llvm::createVerifierPass(); 47 } 48 } ForceVMCoreLinking; 49} 50 51#endif 52