/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * 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.
 */

import {
    CacheList
} from "../base/vregisterCache";
import {
    IRNode
} from "../irnodes";
import { PandaGen } from "../pandagen";
import { Pass } from "../pass";


export class CacheExpander implements Pass {
    run(pandaGen: PandaGen): void {
        let insns: IRNode[] = pandaGen.getInsns();
        let cache = pandaGen.getVregisterCache();
        for (let i = CacheList.MIN; i < CacheList.MAX; i++) {
            let item = cache.getCache(i);
            if (item.isNeeded()) {
                let expander = item.getExpander();
                let expansion = expander(pandaGen);
                if (!expansion) {
                    continue;
                }
                insns.unshift(...expansion);
            }
        }
    }
}