1 //===- LinkAllVMCore.h - Reference All VMCore Code --------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
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.
8 //===----------------------------------------------------------------------===//
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.
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_LINKALLVMCORE_H
17 #define LLVM_LINKALLVMCORE_H
19 #include "llvm/Support/IncludeFile.h"
20 #include "llvm/Module.h"
21 #include "llvm/Instructions.h"
22 #include "llvm/IntrinsicInst.h"
23 #include "llvm/Analysis/Verifier.h"
26 struct ForceVMCoreLinking {
27 ForceVMCoreLinking() {
28 // We must reference VMCore in such a way that compilers will not
29 // delete it all as dead code, even with whole program optimization,
30 // yet is effectively a NO-OP. As the compiler isn't smart enough
31 // to know that getenv() never returns -1, this will do the job.
32 if (std::getenv("bar") != (char*) -1)
34 (void)new llvm::Module("");
35 (void)new llvm::UnreachableInst();
36 (void) llvm::createVerifierPass();