271 lines
10 KiB
Java
271 lines
10 KiB
Java
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/*
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* Copyright 2009 The Closure Compiler Authors.
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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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*/
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package com.google.javascript.jscomp;
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import com.google.javascript.rhino.Node;
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/**
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* @author johnlenz@google.com (John Lenz)
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*/
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public class MinimizeExitPointsTest extends CompilerTestCase {
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@Override
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public void setUp() {
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super.enableLineNumberCheck(true);
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}
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@Override
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protected CompilerPass getProcessor(final Compiler compiler) {
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return new CompilerPass() {
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@Override
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public void process(Node externs, Node js) {
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NodeTraversal.traverse(compiler, js, new MinimizeExitPoints(compiler));
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}
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};
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}
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@Override
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protected int getNumRepetitions() {
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return 1;
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}
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void foldSame(String js) {
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testSame(js);
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}
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void fold(String js, String expected) {
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test(js, expected);
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}
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void fold(String js, String expected, DiagnosticType warning) {
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test(js, expected, warning);
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}
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public void testBreakOptimization() throws Exception {
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fold("f:{if(true){a();break f;}else;b();}",
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"f:{if(true){a()}else{b()}}");
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fold("f:{if(false){a();break f;}else;b();break f;}",
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"f:{if(false){a()}else{b()}}");
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fold("f:{if(a()){b();break f;}else;c();}",
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"f:{if(a()){b();}else{c();}}");
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fold("f:{if(a()){b()}else{c();break f;}}",
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"f:{if(a()){b()}else{c();}}");
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fold("f:{if(a()){b();break f;}else;}",
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"f:{if(a()){b();}else;}");
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fold("f:{if(a()){break f;}else;}",
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"f:{if(a()){}else;}");
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fold("f:while(a())break f;",
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"f:while(a())break f");
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foldSame("f:for(x in a())break f");
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fold("f:{while(a())break;}",
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"f:{while(a())break;}");
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foldSame("f:{for(x in a())break}");
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fold("f:try{break f;}catch(e){break f;}",
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"f:try{}catch(e){}");
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fold("f:try{if(a()){break f;}else{break f;} break f;}catch(e){}",
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"f:try{if(a()){}else{}}catch(e){}");
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fold("f:g:break f",
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"");
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fold("f:g:{if(a()){break f;}else{break f;} break f;}",
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"f:g:{if(a()){}else{}}");
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}
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public void testFunctionReturnOptimization() throws Exception {
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fold("function f(){if(a()){b();if(c())return;}}",
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"function f(){if(a()){b();if(c());}}");
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fold("function f(){if(x)return; x=3; return; }",
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"function f(){if(x); else x=3}");
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fold("function f(){if(true){a();return;}else;b();}",
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"function f(){if(true){a();}else{b();}}");
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fold("function f(){if(false){a();return;}else;b();return;}",
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"function f(){if(false){a();}else{b();}}");
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fold("function f(){if(a()){b();return;}else;c();}",
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"function f(){if(a()){b();}else{c();}}");
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fold("function f(){if(a()){b()}else{c();return;}}",
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"function f(){if(a()){b()}else{c();}}");
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fold("function f(){if(a()){b();return;}else;}",
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"function f(){if(a()){b();}else;}");
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fold("function f(){if(a()){return;}else{return;} return;}",
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"function f(){if(a()){}else{}}");
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fold("function f(){if(a()){return;}else{return;} b();}",
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"function f(){if(a()){}else{return;b()}}");
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fold("function f(){while(a())return;}",
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"function f(){while(a())return}");
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foldSame("function f(){for(x in a())return}");
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fold("function f(){while(a())break;}",
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"function f(){while(a())break}");
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foldSame("function f(){for(x in a())break}");
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fold("function f(){try{return;}catch(e){return;}finally{return}}",
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"function f(){try{}catch(e){}finally{}}");
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fold("function f(){try{return;}catch(e){return;}}",
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"function f(){try{}catch(e){}}");
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fold("function f(){try{return;}finally{return;}}",
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"function f(){try{}finally{}}");
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fold("function f(){try{if(a()){return;}else{return;} return;}catch(e){}}",
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"function f(){try{if(a()){}else{}}catch(e){}}");
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fold("function f(){g:return}",
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"function f(){}");
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fold("function f(){g:if(a()){return;}else{return;} return;}",
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"function f(){g:if(a()){}else{}}");
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fold("function f(){try{g:if(a()){} return;}finally{return}}",
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"function f(){try{g:if(a()){}}finally{}}");
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}
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public void testWhileContinueOptimization() throws Exception {
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fold("while(true){if(x)continue; x=3; continue; }",
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"while(true)if(x);else x=3");
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foldSame("while(true){a();continue;b();}");
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fold("while(true){if(true){a();continue;}else;b();}",
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"while(true){if(true){a();}else{b()}}");
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fold("while(true){if(false){a();continue;}else;b();continue;}",
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"while(true){if(false){a()}else{b();}}");
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fold("while(true){if(a()){b();continue;}else;c();}",
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"while(true){if(a()){b();}else{c();}}");
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fold("while(true){if(a()){b();}else{c();continue;}}",
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"while(true){if(a()){b();}else{c();}}");
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fold("while(true){if(a()){b();continue;}else;}",
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"while(true){if(a()){b();}else;}");
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fold("while(true){if(a()){continue;}else{continue;} continue;}",
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"while(true){if(a()){}else{}}");
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fold("while(true){if(a()){continue;}else{continue;} b();}",
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"while(true){if(a()){}else{continue;b();}}");
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fold("while(true)while(a())continue;",
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"while(true)while(a());");
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fold("while(true)for(x in a())continue",
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"while(true)for(x in a());");
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fold("while(true)while(a())break;",
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"while(true)while(a())break");
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fold("while(true)for(x in a())break",
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"while(true)for(x in a())break");
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fold("while(true){try{continue;}catch(e){continue;}}",
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"while(true){try{}catch(e){}}");
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fold("while(true){try{if(a()){continue;}else{continue;}" +
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"continue;}catch(e){}}",
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"while(true){try{if(a()){}else{}}catch(e){}}");
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fold("while(true){g:continue}",
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"while(true){}");
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// This case could be improved.
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fold("while(true){g:if(a()){continue;}else{continue;} continue;}",
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"while(true){g:if(a());else;}");
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}
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public void testDoContinueOptimization() throws Exception {
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fold("do{if(x)continue; x=3; continue; }while(true)",
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"do if(x); else x=3; while(true)");
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foldSame("do{a();continue;b()}while(true)");
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fold("do{if(true){a();continue;}else;b();}while(true)",
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"do{if(true){a();}else{b();}}while(true)");
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fold("do{if(false){a();continue;}else;b();continue;}while(true)",
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"do{if(false){a();}else{b();}}while(true)");
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fold("do{if(a()){b();continue;}else;c();}while(true)",
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"do{if(a()){b();}else{c()}}while(true)");
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fold("do{if(a()){b();}else{c();continue;}}while(true)",
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"do{if(a()){b();}else{c();}}while(true)");
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fold("do{if(a()){b();continue;}else;}while(true)",
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"do{if(a()){b();}else;}while(true)");
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fold("do{if(a()){continue;}else{continue;} continue;}while(true)",
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"do{if(a()){}else{}}while(true)");
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fold("do{if(a()){continue;}else{continue;} b();}while(true)",
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"do{if(a()){}else{continue; b();}}while(true)");
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fold("do{while(a())continue;}while(true)",
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"do while(a());while(true)");
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fold("do{for(x in a())continue}while(true)",
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"do for(x in a());while(true)");
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fold("do{while(a())break;}while(true)",
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"do while(a())break;while(true)");
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fold("do for(x in a())break;while(true)",
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"do for(x in a())break;while(true)");
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fold("do{try{continue;}catch(e){continue;}}while(true)",
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"do{try{}catch(e){}}while(true)");
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fold("do{try{if(a()){continue;}else{continue;}" +
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"continue;}catch(e){}}while(true)",
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"do{try{if(a()){}else{}}catch(e){}}while(true)");
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fold("do{g:continue}while(true)",
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"do{}while(true)");
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// This case could be improved.
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fold("do{g:if(a()){continue;}else{continue;} continue;}while(true)",
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"do{g:if(a());else;}while(true)");
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fold("do { foo(); continue; } while(false)",
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"do { foo(); } while(false)");
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fold("do { foo(); break; } while(false)",
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"do { foo(); } while(false)");
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}
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public void testForContinueOptimization() throws Exception {
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fold("for(x in y){if(x)continue; x=3; continue; }",
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"for(x in y)if(x);else x=3");
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foldSame("for(x in y){a();continue;b()}");
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fold("for(x in y){if(true){a();continue;}else;b();}",
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"for(x in y){if(true)a();else b();}");
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fold("for(x in y){if(false){a();continue;}else;b();continue;}",
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"for(x in y){if(false){a();}else{b()}}");
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fold("for(x in y){if(a()){b();continue;}else;c();}",
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"for(x in y){if(a()){b();}else{c();}}");
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fold("for(x in y){if(a()){b();}else{c();continue;}}",
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"for(x in y){if(a()){b();}else{c();}}");
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fold("for(x=0;x<y;x++){if(a()){b();continue;}else;}",
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"for(x=0;x<y;x++){if(a()){b();}else;}");
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fold("for(x=0;x<y;x++){if(a()){continue;}else{continue;} continue;}",
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"for(x=0;x<y;x++){if(a()){}else{}}");
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fold("for(x=0;x<y;x++){if(a()){continue;}else{continue;} b();}",
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"for(x=0;x<y;x++){if(a()){}else{continue; b();}}");
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fold("for(x=0;x<y;x++)while(a())continue;",
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"for(x=0;x<y;x++)while(a());");
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fold("for(x=0;x<y;x++)for(x in a())continue",
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"for(x=0;x<y;x++)for(x in a());");
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fold("for(x=0;x<y;x++)while(a())break;",
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"for(x=0;x<y;x++)while(a())break");
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foldSame("for(x=0;x<y;x++)for(x in a())break");
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fold("for(x=0;x<y;x++){try{continue;}catch(e){continue;}}",
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"for(x=0;x<y;x++){try{}catch(e){}}");
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fold("for(x=0;x<y;x++){try{if(a()){continue;}else{continue;}" +
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"continue;}catch(e){}}",
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"for(x=0;x<y;x++){try{if(a()){}else{}}catch(e){}}");
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fold("for(x=0;x<y;x++){g:continue}",
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"for(x=0;x<y;x++){}");
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// This case could be improved.
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fold("for(x=0;x<y;x++){g:if(a()){continue;}else{continue;} continue;}",
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"for(x=0;x<y;x++){g:if(a());else;}");
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}
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public void testCodeMotionDoesntBreakFunctionHoisting() throws Exception {
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fold("function f() { if (x) return; foo(); function foo() {} }",
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"function f() { if (x); else { function foo() {} foo(); } }");
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}
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}
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