[GitHub] [tvm] manupa-arm commented on a change in pull request #7859: [TIR] An analysis pass to calculate workspace size for primfuncs

[GitBox <gi...@apache.org>]

manupa-arm commented on a change in pull request #7859:
URL: https://github.com/apache/tvm/pull/7859#discussion_r614870603



##########
File path: include/tvm/tir/analysis.h
##########
@@ -178,6 +178,12 @@ Array<Array<BufferRegion>> GetBlockAccessRegion(const Block& block,
  */
 TVM_DLL size_t CalculateExprComplexity(const PrimExpr& expr);
 
+/*!
+ * \brief Calculate the workspace size in bytes needed by the TIR allocates inside the TIR PrimFunc
+ * \param func The TIR PrimFunc for which the workspace size to be calculated
+ */
+TVM_DLL int CalculateWorkspaceBytes(const PrimFunc& func);

Review comment:
       Done.

##########
File path: src/tir/analysis/calculate_workspace.cc
##########
@@ -0,0 +1,77 @@
+/*
+ * 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 tir/analysis/calculate_workspace.cc
+ * \brief Calculate any intermediary memory required by PrimFuncs.
+ */
+#include <tvm/arith/analyzer.h>
+#include <tvm/tir/analysis.h>
+#include <tvm/tir/function.h>
+#include <tvm/tir/stmt_functor.h>
+
+namespace tvm {
+namespace tir {
+
+class WorkspaceCalculator : public StmtExprVisitor {
+ public:
+  WorkspaceCalculator() = default;
+  int operator()(const PrimFunc& func);
+
+ private:
+  void VisitStmt_(const AllocateNode* op) override;
+  int CalculateExtentsSize(const AllocateNode* op);
+  int current_size = 0;
+  int max_size = 0;
+};
+
+int WorkspaceCalculator::operator()(const PrimFunc& func) {
+  this->VisitStmt(func->body);
+  return this->max_size;
+}

Review comment:
       Done.




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