ir_simplify.h

// Copyright (c) 2021 CINN 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/ir/ir.h"

namespace cinn {
namespace optim {

/**
 * Simplify the expression.
 * The following cases are supported:
 * a + 0 => a
 * a*0 => 0
 * A[i*0+2*a+3*a+1+2] => A[5*a+3]
 *
 * This only works on the simple IR nodes such as Load, Store, and the math
 * operators such as Add, Sub and so on.
 */
void Simplify(Expr *expr);

void SimplifyForLoops(Expr *expr);

void SimplifyBlocks(Expr *expr);

}  // namespace optim
}  // namespace cinn