1//===----- LinkAllIR.h - Reference All VMCore Code --------------*- C++ -*-===//
2//
3//                      The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This header file pulls in all the object modules of the VMCore library so
11// that tools like llc, opt, and lli can ensure they are linked with all symbols
12// from libVMCore.a It should only be used from a tool's main program.
13//
14//===----------------------------------------------------------------------===//
15
16#ifndef LLVM_LINKALLIR_H
17#define LLVM_LINKALLIR_H
18
19#include "llvm/IR/InlineAsm.h"
20#include "llvm/IR/Instructions.h"
21#include "llvm/IR/IntrinsicInst.h"
22#include "llvm/IR/LLVMContext.h"
23#include "llvm/IR/Module.h"
24#include "llvm/IR/Verifier.h"
25#include "llvm/Support/Dwarf.h"
26#include "llvm/Support/DynamicLibrary.h"
27#include "llvm/Support/MathExtras.h"
28#include "llvm/Support/Memory.h"
29#include "llvm/Support/Mutex.h"
30#include "llvm/Support/Path.h"
31#include "llvm/Support/Process.h"
32#include "llvm/Support/Program.h"
33#include "llvm/Support/Signals.h"
34#include "llvm/Support/TimeValue.h"
35#include <cstdlib>
36
37namespace {
38  struct ForceVMCoreLinking {
39    ForceVMCoreLinking() {
40      // We must reference VMCore in such a way that compilers will not
41      // delete it all as dead code, even with whole program optimization,
42      // yet is effectively a NO-OP. As the compiler isn't smart enough
43      // to know that getenv() never returns -1, this will do the job.
44      if (std::getenv("bar") != (char*) -1)
45        return;
46      (void)new llvm::Module("", llvm::getGlobalContext());
47      (void)new llvm::UnreachableInst(llvm::getGlobalContext());
48      (void)    llvm::createVerifierPass();
49    }
50  } ForceVMCoreLinking;
51}
52
53#endif
54