block_dependence_info.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 */
#ifndef TVM_TIR_BLOCK_DEPENDENCE_INFO_H_
#define TVM_TIR_BLOCK_DEPENDENCE_INFO_H_
 
#include <tvm/ffi/reflection/registry.h>
#include <tvm/tir/block_scope.h>
 
#include <unordered_map>
 
namespace tvm {
namespace tir {
 
class BlockDependenceInfoNode : public Object {
 public:
  std::unordered_map<StmtSRef, BlockScope, ObjectPtrHash, ObjectPtrEqual> sref2scope;
  std::unordered_map<const StmtNode*, StmtSRef> stmt2ref;
 
  static void RegisterReflection() {
    namespace refl = tvm::ffi::reflection;
    refl::ObjectDef<BlockDependenceInfoNode>();
  }
  TVM_FFI_DECLARE_OBJECT_INFO_FINAL("tir.BlockDependenceInfo", BlockDependenceInfoNode, Object);
 
  BlockScope GetBlockScope(const StmtSRef& scope_root) const {
    auto it = sref2scope.find(scope_root);
    CHECK(it != sref2scope.end())
        << "IndexError: Cannot find the corresponding BlockScope to the block sref:\n"
        << ffi::GetRef<Stmt>(scope_root->stmt);
    return it->second;
  }
};
 
class BlockDependenceInfo : public ObjectRef {
  TVM_DLL BlockDependenceInfo();
 
 public:
  TVM_DLL BlockDependenceInfo(IRModule mod);
 
  TVM_FFI_DEFINE_OBJECT_REF_METHODS_NOTNULLABLE(BlockDependenceInfo, ObjectRef,
                                                BlockDependenceInfoNode);
};
 
}  // namespace tir
}  // namespace tvm
#endif  // TVM_TIR_BLOCK_DEPENDENCE_INFO_H_