1/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19#include <tvm/meta_schedule/schedule/generic/winograd.h>
20
21namespace tvm {
22namespace meta_schedule {
23
24using namespace tvm::tir;
25
26/*!
27 * \brief Get the producer block of a given block.
28 * If there is a constant winograd transform matrix, inline it.
29 * \return The only producer block.
30 */
31BlockRV GetWinogradProducerAndInlineConst(Schedule sch, BlockRV block) {
32 Array<BlockRV> producers = sch->GetProducers(block);
33 Array<BlockRV> results;
34 for (const BlockRV& producer : producers) {
35 if (sch->Get(producer)->reads.empty()) {
36 sch->ComputeInline(producer);
37 } else {
38 results.push_back(producer);
39 }
40 }
41 ICHECK_EQ(results.size(), 1);
42 return results[0];
43}
44
45} // namespace meta_schedule
46} // namespace tvm
47