1 /*
2 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "mir_compiler.h"
17
18 #include <llvm/Analysis/TargetTransformInfo.h>
19 #include <llvm/MC/TargetRegistry.h>
20 #include <llvm/Object/ObjectFile.h>
21 #include <llvm/Support/SmallVectorMemoryBuffer.h>
22
23 namespace ark::llvmbackend {
24
add(llvm::Pass *p)25 void InsertingPassManager::add(llvm::Pass *p)
26 {
27 // Obtain id first before PassManager::add. It might free the pass.
28 auto id = p->getPassID();
29 if (befores_.find(id) != befores_.end()) {
30 InsertingPassManager::add(befores_[id]);
31 }
32 llvm::legacy::PassManager::add(p);
33 }
34
CompileModule(llvm::Module &module)35 llvm::Expected<std::unique_ptr<CreatedObjectFile>> MIRCompiler::CompileModule(llvm::Module &module)
36 {
37 llvm::SmallVector<char, 0> rawBuffer;
38 {
39 llvm::raw_svector_ostream rawStream(rawBuffer);
40
41 InsertingPassManager manager;
42
43 if (insertPasses_) {
44 insertPasses_(&manager);
45 }
46 // Some passes from addPassesToEmitMC require TargetTransformInfo
47 manager.add(llvm::createTargetTransformInfoWrapperPass(targetMachine_->getTargetIRAnalysis()));
48 if (targetMachine_->addPassesToEmitFile(manager, rawStream, nullptr, llvm::CGFT_ObjectFile)) {
49 return llvm::make_error<llvm::StringError>("Target does not support MC emission",
50 llvm::inconvertibleErrorCode());
51 }
52 manager.run(module);
53 }
54
55 auto memBuffer = std::make_unique<llvm::SmallVectorMemoryBuffer>(std::move(rawBuffer),
56 module.getModuleIdentifier() + "-object-buffer");
57
58 return CreatedObjectFile::CopyOf(memBuffer->getMemBufferRef());
59 }
60
61 } // namespace ark::llvmbackend
62