1/* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import { CmdOptions } from "../cmdOptions"; 17import { 18 IRNode 19} from "../irnodes"; 20import { PandaGen } from "../pandagen"; 21import { VariableScope } from "../scope"; 22import { 23 newLexicalEnv, 24 storeAccumulator 25} from "./bcGenUtil"; 26import { CacheList, getVregisterCache } from "./vregisterCache"; 27 28function createLexEnv(pandaGen: PandaGen, scope: VariableScope): IRNode[] { 29 let lexEnvVars = scope.getNumLexEnv(); 30 let insns: IRNode[] = []; 31 let scopeInfoId: string | undefined = undefined; 32 let lexVarInfo = scope.getLexVarInfo(); 33 if (CmdOptions.isDebugMode()) { 34 scopeInfoId = pandaGen.appendScopeInfo(lexVarInfo); 35 } 36 37 insns.push( 38 newLexicalEnv(lexEnvVars, scopeInfoId), 39 storeAccumulator(getVregisterCache(pandaGen, CacheList.LexEnv)) 40 ); 41 42 return insns; 43} 44 45export function expandLexEnv(pandaGen: PandaGen): IRNode[] { 46 let scope = pandaGen.getScope()!.getNearestVariableScope(); 47 let insns: IRNode[]; 48 49 if (!scope) { 50 throw new Error("pandagen must have one variable scope"); 51 } 52 53 if (scope.need2CreateLexEnv()) { 54 insns = createLexEnv(pandaGen, scope); 55 } 56 57 return insns; 58} 59