1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 public class Main { 18 19 /// CHECK-START: void Main.testNewStringFromBytes() builder (after) 20 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromBytes intrinsic:None 21 22 /// CHECK-START: void Main.testNewStringFromBytes() intrinsics_recognition (after) 23 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromBytes intrinsic:StringNewStringFromBytes 24 testNewStringFromBytes()25 public static void testNewStringFromBytes() { 26 byte[] bytes = { 'f', 'o', 'o' }; 27 String s = StringFactory.newStringFromBytes(bytes, 0, 0, 3); 28 System.out.println(s); 29 } 30 31 // The (native) method 32 // 33 // java.lang.StringFactory.newStringFromChars(int offset, int charCount, char[] data) 34 // 35 // is recognized as intrinsic StringNewStringFromChars. However, 36 // because this method is not public, we cannot call it and check 37 // that the compiler actually intrinsifies it (as it does for the 38 // StringNewStringFromBytes and StringNewStringFromString 39 // intrinsics) with Checker. 40 // 41 // We can call a public method such as 42 // 43 // java.lang.StringFactory.newStringFromChars(char[] data) 44 // 45 // which contains a call to the former (non-public) native method. 46 // However, this call will not be inlined (because it is a method in 47 // another Dex file and which contains a call, which needs an 48 // environment), so we cannot use Checker here to ensure the native 49 // call was intrinsified either. 50 51 /// CHECK-START: void Main.testNewStringFromChars() builder (after) 52 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromChars intrinsic:None 53 54 /// CHECK-START: void Main.testNewStringFromChars() intrinsics_recognition (after) 55 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromChars intrinsic:None 56 57 /// CHECK-START: void Main.testNewStringFromChars() inliner (after) 58 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromChars intrinsic:None 59 testNewStringFromChars()60 public static void testNewStringFromChars() { 61 char[] chars = { 'b', 'a', 'r' }; 62 String s = StringFactory.newStringFromChars(chars); 63 System.out.println(s); 64 } 65 66 /// CHECK-START: void Main.testNewStringFromString() builder (after) 67 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromString intrinsic:None 68 69 /// CHECK-START: void Main.testNewStringFromString() intrinsics_recognition (after) 70 /// CHECK-DAG: InvokeStaticOrDirect method_name:java.lang.StringFactory.newStringFromString intrinsic:StringNewStringFromString 71 testNewStringFromString()72 public static void testNewStringFromString() { 73 String s1 = "baz"; 74 String s2 = StringFactory.newStringFromString(s1); 75 System.out.println(s2); 76 } 77 main(String[] args)78 public static void main(String[] args) throws Exception { 79 testNewStringFromBytes(); 80 testNewStringFromChars(); 81 testNewStringFromString(); 82 } 83 } 84