| /* |
| * 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 |
| * under the License. |
| */ |
| |
| /*! |
| * \file feature_visitor.cc |
| * \brief Base class for feature extractor. |
| * These features are used for machine learning cost model |
| */ |
| |
| #include "feature_visitor.h" |
| |
| namespace tvm { |
| namespace autotvm { |
| |
| // for loop |
| void FeatureVisitor::VisitStmt_(const ForNode* op) { |
| const auto* extent = op->extent.as<IntImmNode>(); |
| int64_t loop_extent = -1; |
| if (extent != nullptr) loop_extent = extent->value; |
| AnnotationType ann = kSerial; |
| switch (op->kind) { |
| case ForKind ::kParallel: |
| ann = kParallel; |
| break; |
| case ForKind::kUnrolled: |
| ann = kUnrolled; |
| break; |
| case ForKind::kVectorized: |
| ann = kVectorized; |
| break; |
| case ForKind::kSerial: |
| ann = kSerial; |
| break; |
| case ForKind::kThreadBinding: |
| LOG(FATAL) << "Loop ThreadBinding is reserved for future used and " |
| << "not yet supported in TIR"; |
| break; |
| } |
| |
| if (EnterItervar_(op->loop_var, loop_extent, ann)) { |
| StmtExprVisitor::VisitStmt_(op); |
| ExitItervar_(); |
| } |
| } |
| |
| // parallel axis, virtual thread |
| void FeatureVisitor::VisitStmt_(const AttrStmtNode* op) { |
| if (op->attr_key == attr::thread_extent || op->attr_key == attr::virtual_thread) { |
| Var var = op->node.as<tir::IterVarNode>()->var; |
| const auto* extent = op->value.as<IntImmNode>(); |
| ICHECK(extent); |
| |
| std::string name = var.get()->name_hint; |
| AnnotationType ann = kParallel; |
| if (op->attr_key == attr::thread_extent) { |
| if (name == "blockIdx.x") |
| ann = kBlockX; |
| else if (name == "blockIdx.y") |
| ann = kBlockY; |
| else if (name == "blockIdx.z") |
| ann = kBlockZ; |
| else if (name == "threadIdx.x") |
| ann = kThreadX; |
| else if (name == "threadIdx.y") |
| ann = kThreadY; |
| else if (name == "threadIdx.z") |
| ann = kThreadZ; |
| else |
| LOG(FATAL) << "invalid thread itervar " + name; |
| } else { |
| ann = kVirtualThread; |
| } |
| |
| if (EnterItervar_(var, extent->value, ann)) { |
| StmtExprVisitor::VisitStmt_(op); |
| ExitItervar_(); |
| } |
| } else { |
| StmtExprVisitor::VisitStmt_(op); |
| } |
| } |
| |
| // memory access |
| void FeatureVisitor::VisitExpr_(const LoadNode* op) { |
| EnterMem_(op->buffer_var, op->index); |
| StmtExprVisitor::VisitExpr_(op); |
| ExitMem_(); |
| } |
| |
| void FeatureVisitor::VisitStmt_(const StoreNode* op) { |
| EnterMem_(op->buffer_var, op->index); |
| StmtExprVisitor::VisitStmt_(op); |
| ExitMem_(); |
| } |
| |
| } // namespace autotvm |
| } // namespace tvm |