LLVM  16.0.0git
LinkAllIR.h
Go to the documentation of this file.
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 
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"
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 
34 namespace {
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  // This is so that globals in the translation units where these functions
42  // are defined are forced to be initialized, populating various
43  // registries.
44  if (std::getenv("bar") != (char*) -1)
45  return;
47  (void)new llvm::Module("", Context);
48  (void)new llvm::UnreachableInst(Context);
49  (void) llvm::createVerifierPass();
50  }
51  } ForceVMCoreLinking;
52 }
53 
54 #endif
Signals.h
MathExtras.h
InlineAsm.h
Path.h
DynamicLibrary.h
Module.h
Context
LLVMContext & Context
Definition: NVVMIntrRange.cpp:66
Process.h
llvm::LLVMContext
This is an important class for using LLVM in a threaded context.
Definition: LLVMContext.h:67
llvm::Module
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:65
Dwarf.h
Memory.h
llvm::createVerifierPass
FunctionPass * createVerifierPass(bool FatalErrors=true)
Definition: Verifier.cpp:6742
Mutex.h
Verifier.h
Instructions.h
Program.h
llvm::UnreachableInst
This function has undefined behavior.
Definition: Instructions.h:4771
LLVMContext.h