chore: import upstream snapshot with attribution

paddle/pir/include/pattern_rewrite/pattern_applicator.h

@@ -0,0 +1,59 @@
+// Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed 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.
+
+// The design and code is mainly from MLIR, thanks to the great project.
+
+#pragma once
+
+#include <functional>
+#include <unordered_map>
+
+#include "paddle/pir/include/core/op_info.h"
+#include "paddle/pir/include/core/operation.h"
+#include "paddle/pir/include/pattern_rewrite/pattern_match.h"
+
+namespace pir {
+
+class FrozenRewritePatternSet;
+class RewritePattern;
+class Pattern;
+
+class PatternApplicator {
+ public:
+  using CostModel = std::function<PatternBenefit(const Pattern&)>;
+
+  explicit PatternApplicator(const FrozenRewritePatternSet& frozen_patter_list);
+  ~PatternApplicator() = default;
+
+  bool MatchAndRewrite(Operation* op,
+                       PatternRewriter& rewriter,  // NOLINT
+                       std::function<bool(const Pattern&)> can_apply = {},
+                       std::function<void(const Pattern&)> on_failure = {},
+                       std::function<bool(const Pattern&)> on_success = {});
+
+  void ApplyCostModel(const CostModel& model);
+
+  void ApplyDefaultCostModel() {
+    ApplyCostModel([](const Pattern& pattern) { return pattern.benefit(); });
+  }
+
+  void WalkAllPatterns(std::function<void(const Pattern&)> walk);
+
+ private:
+  const FrozenRewritePatternSet& frozen_pattern_list_;
+  std::unordered_map<OpInfo, std::vector<const RewritePattern*>> patterns_;
+  std::vector<const RewritePattern*> any_op_patterns_;
+};
+
+}  // namespace pir