b78e9faa70
LinkGraphLinkingLayer and ObjectLinkingLayer will start requiring a jitlink::JITLinkMemoryManager argument in an upcoming commit. In preparation for that, this patch threads a MemMgr argument through the LLJITBuilder::ObjectLinkingLayerCreator factory type. Note: This patch does not thread the argument through the C API (LLVMOrcLLJITBuilderObjectLinkingLayerCreatorFunction) yet so as to not break compatibility. All current users of the C API construct RuntimeDyld instances, which would have to ignore this argument anyway. If we don't update the LLVMOrcLLJITBuilderObjectLinkingLayerCreatorFunction type before RuntimeDyld is removed then that will be a good time to update it, since all existing users were going to have to rewrite their code anyway.
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
//===--------------- LLJITWithCustomObjectLinkingLayer.cpp ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file shows how to switch LLJIT to use a custom object linking layer (we
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// use ObjectLinkingLayer, which is backed by JITLink, as an example).
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ExecutionEngine/JITLink/JITLinkMemoryManager.h"
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#include "llvm/ExecutionEngine/Orc/LLJIT.h"
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#include "llvm/ExecutionEngine/Orc/ObjectLinkingLayer.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/raw_ostream.h"
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#include "../ExampleModules.h"
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using namespace llvm;
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using namespace llvm::orc;
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ExitOnError ExitOnErr;
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int main(int argc, char *argv[]) {
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// Initialize LLVM.
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InitLLVM X(argc, argv);
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InitializeNativeTarget();
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InitializeNativeTargetAsmPrinter();
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cl::ParseCommandLineOptions(argc, argv, "LLJITWithCustomObjectLinkingLayer");
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ExitOnErr.setBanner(std::string(argv[0]) + ": ");
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// Detect the host and set code model to small.
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auto JTMB = ExitOnErr(JITTargetMachineBuilder::detectHost());
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JTMB.setCodeModel(CodeModel::Small);
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// Create an LLJIT instance with an ObjectLinkingLayer as the base layer.
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auto J = ExitOnErr(
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LLJITBuilder()
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.setJITTargetMachineBuilder(std::move(JTMB))
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.setObjectLinkingLayerCreator(
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[&](ExecutionSession &ES, jitlink::JITLinkMemoryManager &MemMgr) {
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return std::make_unique<ObjectLinkingLayer>(ES, MemMgr);
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})
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.create());
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auto M = ExitOnErr(parseExampleModule(Add1Example, "add1"));
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ExitOnErr(J->addIRModule(std::move(M)));
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// Look up the JIT'd function, cast it to a function pointer, then call it.
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auto Add1Addr = ExitOnErr(J->lookup("add1"));
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int (*Add1)(int) = Add1Addr.toPtr<int(int)>();
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int Result = Add1(42);
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outs() << "add1(42) = " << Result << "\n";
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return 0;
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}
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