include/llvm/LinkAllVMCore.h

   1 //===- LinkAllVMCore.h - Reference All VMCore Code --------------*- C++ -*-===//
   2 //
   3 //                      The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by Reid Spencer and is distributed under the
   6 // University of Illinois Open Source 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_LINKALLVMCORE_H
  17 #define LLVM_LINKALLVMCORE_H
  18
  19 #include "llvm/System/IncludeFile.h"
  20
  21 #include "llvm/Module.h"
  22 #include "llvm/Instructions.h"
  23 #include "llvm/IntrinsicInst.h"
  24 #include "llvm/InlineAsm.h"
  25 #include "llvm/Analysis/Verifier.h"
  26 #include "llvm/System/Alarm.h"
  27 #include "llvm/System/DynamicLibrary.h"
  28 #include "llvm/System/MappedFile.h"
  29 #include "llvm/System/Memory.h"
  30 #include "llvm/System/Mutex.h"
  31 #include "llvm/System/Path.h"
  32 #include "llvm/System/Process.h"
  33 #include "llvm/System/Program.h"
  34 #include "llvm/System/Signals.h"
  35 #include "llvm/System/TimeValue.h"
  36 #include "llvm/Support/Dwarf.h"
  37 #include "llvm/Support/Mangler.h"
  38 #include "llvm/Support/MathExtras.h"
  39 #include "llvm/Support/SlowOperationInformer.h"
  40
  41 namespace {
  42   struct ForceVMCoreLinking {
  43     ForceVMCoreLinking() {
  44       // We must reference VMCore in such a way that compilers will not
  45       // delete it all as dead code, even with whole program optimization,
  46       // yet is effectively a NO-OP. As the compiler isn't smart enough
  47       // to know that getenv() never returns -1, this will do the job.
  48       if (std::getenv("bar") != (char*) -1)
  49         return;
  50       (void)new llvm::Module("");
  51       (void)new llvm::UnreachableInst();
  52       (void)    llvm::createVerifierPass();
  53     }
  54   } ForceVMCoreLinking;
  55 }
  56
  57 #endif