chore: import upstream snapshot with attribution

paddle/fluid/framework/ir/runtime_context_cache_pass.cc

@@ -0,0 +1,52 @@
+/* Copyright (c) 2019 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. */
+
+#include "paddle/fluid/framework/ir/runtime_context_cache_pass.h"
+
+#include "paddle/fluid/framework/ir/graph_helper.h"
+#include "paddle/fluid/framework/operator.h"
+
+namespace paddle::framework::ir {
+
+void RuntimeContextCachePass::ApplyImpl(ir::Graph* graph) const {
+  static constexpr char kNotAllowInferShapeCache[] =  // NOLINT
+      "@NOT_ALLOW_INFERSHAPE_CACHE@";
+  VLOG(3) << "Applies Runtime Context Cache strategy.";
+  for (const Node* n : graph->Nodes()) {
+    if (n->IsOp() && n->Op()) {
+      n->Op()->SetAttr(framework::kEnableCacheRuntimeContext, true);
+    }
+  }
+
+  // if op1 -> var0 and op2 -> var0, then op1 and op2 not support
+  // InferShapeCache.
+  std::unordered_map<std::string, std::vector<Node*>> var2ops;
+  for (auto* op_node : TopologySortOperations(*graph)) {
+    for (auto* var_node : op_node->outputs) {
+      var2ops[var_node->Name()].push_back(op_node);
+    }
+  }
+  for (auto& it : var2ops) {
+    if (it.second.size() > 1) {
+      for (auto op_node : it.second) {
+        op_node->Op()->SetAttr(kNotAllowInferShapeCache, true);
+      }
+    }
+  }
+}
+
+}  // namespace paddle::framework::ir
+
+REGISTER_PASS(runtime_context_cache_pass,
+              paddle::framework::ir::RuntimeContextCachePass);