wehub-resource-sync
135 lines
3.9 KiB
C++
135 lines
3.9 KiB
C++
// Copyright (c) 2024 CINN Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <optional>
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#include <vector>
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#include "paddle/cinn/ir/ir.h"
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#include "paddle/cinn/ir/ir_base.h"
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namespace cinn {
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namespace common {
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template <typename Op>
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inline std::optional<ir::Expr> TryConstFold(ir::Expr a, ir::Expr b);
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Add>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = pa->value + pb->value;
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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if (pa && pa->value == 0) return b;
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if (pb && pb->value == 0) return a;
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Sub>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = pa->value - pb->value;
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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if (pb && pb->value == 0) return a;
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Mul>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = pa->value * pb->value;
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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if (pa) {
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if (pa->value == 1) return b;
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if (pa->value == 0) return a;
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}
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if (pb) {
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if (pb->value == 1) return a;
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if (pb->value == 0) return b;
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}
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Div>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = pa->value / pb->value;
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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if (pa) {
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if (pa->value == 0) return a;
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}
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if (pb) {
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if (pb->value == 1) return a;
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}
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Mod>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = pa->value % pb->value;
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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if (pa) {
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if (pa->value == 0) return a;
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}
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if (pb) {
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if (pb->value == 1) return ir::Zero(rtype);
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}
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Min>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = std::min(pa->value, pb->value);
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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return std::nullopt;
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}
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template <>
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inline std::optional<ir::Expr> TryConstFold<ir::Max>(ir::Expr a, ir::Expr b) {
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const ir::IntImm* pa = a.As<ir::IntImm>();
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const ir::IntImm* pb = b.As<ir::IntImm>();
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const auto& rtype = a.type();
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if (pa && pb) {
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int64_t res = std::max(pa->value, pb->value);
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return cinn::common::make_shared<ir::IntImm>(rtype, res);
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}
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return std::nullopt;
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}
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} // namespace common
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} // namespace cinn
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