1 /* 2 * Copyright (c) 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 #ifndef LIBLLVMBACKEND_TRANSFORMS_PASSES_MEM_BARRIERS_H 17 #define LIBLLVMBACKEND_TRANSFORMS_PASSES_MEM_BARRIERS_H 18 19 #include "llvm_ark_interface.h" 20 21 #include <llvm/IR/PassManager.h> 22 23 namespace ark::llvmbackend { 24 struct LLVMCompilerOptions; 25 } // namespace ark::llvmbackend 26 27 namespace ark::llvmbackend::passes { 28 29 class MemBarriers : public llvm::PassInfoMixin<MemBarriers> { 30 public: 31 explicit MemBarriers(LLVMArkInterface *arkInterface, bool optimize); 32 ShouldInsert(const ark::llvmbackend::LLVMCompilerOptions * options)33 static bool ShouldInsert([[maybe_unused]] const ark::llvmbackend::LLVMCompilerOptions *options) 34 { 35 return true; 36 } 37 38 static MemBarriers Create(LLVMArkInterface *arkInterface, const ark::llvmbackend::LLVMCompilerOptions *options); 39 40 // NOLINTNEXTLINE(readability-identifier-naming) 41 llvm::PreservedAnalyses run(llvm::Function &function, llvm::FunctionAnalysisManager &analysisManager); 42 43 private: 44 bool GrabsGuarded(llvm::Instruction *inst, llvm::SmallVector<llvm::Instruction *> &mergeSet); 45 void MergeBarriers(llvm::SmallVector<llvm::Instruction *> &mergeSet, 46 llvm::SmallVector<llvm::Instruction *> &needsBarrier); 47 bool RelaxBarriers(llvm::Function &function); 48 49 private: 50 LLVMArkInterface *arkInterface_; 51 bool optimize_; 52 53 public: 54 static constexpr llvm::StringRef ARG_NAME = "mem-barriers"; 55 }; 56 57 } // namespace ark::llvmbackend::passes 58 59 #endif // LIBLLVMBACKEND_TRANSFORMS_PASSES_MEM_BARRIERS_H 60