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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===----- LinkAllIR.h - Reference All VMCore Code --------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This header file pulls in all the object modules of the VMCore library so |
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| 10 | // that tools like llc, opt, and lli can ensure they are linked with all symbols |
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| 11 | // from libVMCore.a It should only be used from a tool's main program. |
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| 12 | // |
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| 13 | //===----------------------------------------------------------------------===// |
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| 14 | |||
| 15 | #ifndef LLVM_LINKALLIR_H |
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| 16 | #define LLVM_LINKALLIR_H |
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| 17 | |||
| 18 | #include "llvm/BinaryFormat/Dwarf.h" |
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| 19 | #include "llvm/IR/InlineAsm.h" |
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| 20 | #include "llvm/IR/Instructions.h" |
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| 21 | #include "llvm/IR/LLVMContext.h" |
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| 22 | #include "llvm/IR/Module.h" |
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| 23 | #include "llvm/IR/Verifier.h" |
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| 24 | #include "llvm/Support/DynamicLibrary.h" |
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| 25 | #include "llvm/Support/MathExtras.h" |
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| 26 | #include "llvm/Support/Memory.h" |
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| 27 | #include "llvm/Support/Mutex.h" |
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| 28 | #include "llvm/Support/Path.h" |
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| 29 | #include "llvm/Support/Process.h" |
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| 30 | #include "llvm/Support/Program.h" |
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| 31 | #include "llvm/Support/Signals.h" |
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| 32 | #include <cstdlib> |
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| 33 | |||
| 34 | namespace { |
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| 35 | struct ForceVMCoreLinking { |
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| 36 | ForceVMCoreLinking() { |
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| 37 | // We must reference VMCore in such a way that compilers will not |
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| 38 | // delete it all as dead code, even with whole program optimization, |
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| 39 | // yet is effectively a NO-OP. As the compiler isn't smart enough |
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| 40 | // to know that getenv() never returns -1, this will do the job. |
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| 41 | // This is so that globals in the translation units where these functions |
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| 42 | // are defined are forced to be initialized, populating various |
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| 43 | // registries. |
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| 44 | if (std::getenv("bar") != (char*) -1) |
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| 45 | return; |
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| 46 | llvm::LLVMContext Context; |
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| 47 | (void)new llvm::Module("", Context); |
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| 48 | (void)new llvm::UnreachableInst(Context); |
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| 49 | (void) llvm::createVerifierPass(); |
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| 50 | } |
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| 51 | } ForceVMCoreLinking; |
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| 52 | } |
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| 53 | |||
| 54 | #endif |