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Subject [GitHub] [incubator-tvm] sergei-grechanik commented on a change in pull request #5171: [Arith] linear system and equation solver
Date Wed, 08 Apr 2020 16:26:50 GMT
sergei-grechanik commented on a change in pull request #5171: [Arith] linear system and equation
solver
URL: https://github.com/apache/incubator-tvm/pull/5171#discussion_r405651952
 
 

 ##########
 File path: include/tvm/arith/int_solver.h
 ##########
 @@ -0,0 +1,176 @@
+/*
+ * 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 tvm/arith/int_solver.h
+ * \brief integer constraints data structures and solvers
+ */
+#ifndef TVM_ARITH_INT_SOLVER_H_
+#define TVM_ARITH_INT_SOLVER_H_
+
+#include <tvm/ir/expr.h>
+#include <tvm/tir/expr.h>
+#include <unordered_map>
+#include <vector>
+
+namespace tvm {
+namespace arith {
+
+using tir::Var;
+using tir::VarNode;
+using tir::IterVar;
+
+/*!
+ * \brief Represent integer constrains including (integer) variables, their ranges and
+ *        the relations between them (either equations or inequalities).
+ * \sa LinearSystem
+ */
+class IntConstraintsNode : public Object {
+ public:
+  // e.g., \alpha, \beta, must be integers
+  Array<Var> variables;
+  // e.g., 1 <= \alpha <= N, etc.
 
 Review comment:
   Add a comment that it is absolutely ok to include ranges for parameters (variables that
are not in `variables`) in this map.

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