chore: import upstream snapshot with attribution

paddle/cinn/operator_fusion/pattern_node.h

@@ -0,0 +1,124 @@
+// Copyright (c) 2024 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.
+
+#pragma once
+
+#include "paddle/cinn/operator_fusion/pattern.h"
+#include "paddle/cinn/operator_fusion/pattern_fuser.h"
+#include "paddle/cinn/operator_fusion/utils.h"
+
+namespace cinn::fusion {
+
+struct PatternNode {
+  using PatternNodePtr = std::shared_ptr<PatternNode>;
+  using MergePatternFn =
+      std::function<StmtPattern(const StmtPattern&, const StmtPattern&)>;
+
+  explicit PatternNode(const PatternContent& content)
+      : sink_op_(content.op), stmt_pattern_(ConvertToStmtPattern(content)) {}
+
+  explicit PatternNode(PatternNodePtr fused_up_node,
+                       PatternNodePtr fused_down_node,
+                       MergePatternFn merge_pattern_fn)
+      : sink_op_(fused_down_node->sink_op_),
+        stmt_pattern_(merge_pattern_fn(fused_up_node->stmt_pattern_,
+                                       fused_down_node->stmt_pattern_)) {
+    // Update the upstream & downstream
+    ExtendVector(&upstream_, fused_up_node->upstream());
+    ExtendVector(&upstream_, fused_down_node->upstream());
+    RemoveFromVector(&upstream_, fused_up_node);
+
+    ExtendVector(&downstream_, fused_up_node->downstream());
+    ExtendVector(&downstream_, fused_down_node->downstream());
+    RemoveFromVector(&downstream_, fused_down_node);
+  }
+
+  std::string DebugStr() const {
+    std::stringstream ss;
+    ss << "Node: " << this << ", ID: " << GetPatternId(stmt_pattern());
+    ss << "\n    -u>:  ";
+    for (const auto& u : upstream_) {
+      ss << GetPatternId(u->stmt_pattern()) << "(" << u << "), ";
+    }
+    ss << "\n    <d-:  ";
+    for (const auto& d : downstream_) {
+      ss << GetPatternId(d->stmt_pattern()) << "(" << d << "), ";
+    }
+    ss << "\nOps in pattern:" << std::endl;
+    ss << OpsDebugStr(GetOpsInPattern(this->stmt_pattern()));
+    ss << "\nLoop Mapping is: " << loop_axis_mapping().DebugStr();
+    return ss.str();
+  }
+
+  pir::Operation* sink_op() const { return sink_op_; }
+  std::vector<pir::Operation*> ops() const {
+    return GetOpsInPattern(stmt_pattern_);
+  }
+  const StmtPattern& stmt_pattern() const { return stmt_pattern_; }
+  void set_stmt_pattern(const StmtPattern& pattern) { stmt_pattern_ = pattern; }
+  const std::vector<PatternNodePtr>& upstream() const { return upstream_; }
+  const std::vector<PatternNodePtr>& downstream() const { return downstream_; }
+  PatternType type() const { return GetPatternType(stmt_pattern_); }
+  std::string id() const { return GetPatternId(stmt_pattern_); }
+  void set_return() const { SetReturnInstr(stmt_pattern_); }
+  void AddNodeToUpstream(PatternNodePtr node) { upstream_.push_back(node); }
+  void AddNodeToDownstream(PatternNodePtr node) { downstream_.push_back(node); }
+  void RemoveNodeFromUpstream(PatternNodePtr node) {
+    RemoveFromVector(&upstream_, node);
+  }
+  void RemoveNodeFromDownstream(PatternNodePtr node) {
+    RemoveFromVector(&downstream_, node);
+  }
+  void ClearUpstream() { upstream_.clear(); }
+  void ClearDownstream() { downstream_.clear(); }
+  void UniqueUpstream() { upstream_ = UniqueVectorBySet(upstream_); }
+  void UniqueDownstream() { downstream_ = UniqueVectorBySet(downstream_); }
+  void AppendInstr(FusionInstrPtr instr) {
+    GetFusionTracker(stmt_pattern_)->append(instr);
+  }
+  void UpdateTracker() { PatternUpdateTracker(stmt_pattern_); }
+  FusionTrackerPtr fusion_tracker() { return GetFusionTracker(stmt_pattern_); }
+  void set_loop_axis_mapping(const LoopAxisMapping& loop_axis_mapping) {
+    std::visit(
+        [&](auto& pattern) {
+          pattern.set_loop_axis_mapping(loop_axis_mapping);
+        },
+        stmt_pattern_);
+  }
+  LoopAxisMapping loop_axis_mapping() const {
+    return GetPatternLoopAxisMapping(stmt_pattern_);
+  }
+
+ private:
+  StmtPattern stmt_pattern_;
+  pir::Operation* sink_op_;
+
+  std::vector<PatternNodePtr> upstream_;
+  std::vector<PatternNodePtr> downstream_;
+};
+
+using PatternNodePtr = std::shared_ptr<PatternNode>;
+
+struct PatternNodeCompare {
+  bool operator()(const PatternNodePtr& lhs, const PatternNodePtr& rhs) const {
+    int lhs_id = std::stoi(
+        lhs->id().substr(lhs->id().find_last_of('_') + 1, std::string::npos));
+    int rhs_id = std::stoi(
+        rhs->id().substr(rhs->id().find_last_of('_') + 1, std::string::npos));
+    return lhs->type() == rhs->type() ? lhs_id < rhs_id
+                                      : lhs->type() < rhs->type();
+  }
+};
+using PatternNodePtrSet = std::set<PatternNodePtr, PatternNodeCompare>;
+}  // namespace cinn::fusion