1 /* 2 * Copyright (C) 2015 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 public static int foo(int start, int[] array) { 19 int result = 0; 20 // We will create HDeoptimize nodes for this first loop, and a phi 21 // for the array length which will only be used within the loop. 22 for (int i = start; i < 3; i++) { 23 result += array[i]; 24 for (int j = 0; j < 2; ++j) { 25 // The HBoundsCheck for this array access will be updated to access 26 // the array length phi created for the deoptimization checks of the 27 // first loop. This crashed the compiler which used to DCHECK an array 28 // length in a bounds check cannot be a phi. 29 result += array[j]; 30 } 31 } 32 return result; 33 } 34 35 public static int bar(int start, int[] array) { 36 int result = 0; 37 for (int i = start; i < 3; i++) { 38 result += array[i]; 39 for (int j = 0; j < 2; ++j) { 40 result += array[j]; 41 // The following operations would lead to BCE wanting to add another 42 // deoptimization, but it crashed assuming the input of a `HBoundsCheck` 43 // must be a `HArrayLength`. 44 result += array[0]; 45 result += array[1]; 46 result += array[2]; 47 } 48 } 49 return result; 50 } 51 52 public static void main(String[] args) { 53 int[] a = new int[] { 1, 2, 3, 4, 5 }; 54 int result = foo(1, a); 55 if (result != 11) { 56 throw new Error("Got " + result + ", expected " + 11); 57 } 58 59 result = bar(1, a); 60 if (result != 35) { 61 throw new Error("Got " + result + ", expected " + 35); 62 } 63 } 64 } 65
