1 /* 2 * Copyright (C) 2024 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 class Main { main(String[] h)18 public static void main(String[] h) { 19 assertIntEquals(50, $noinline$SecondInnerLoopReferencesFirst()); 20 } 21 $noinline$SecondInnerLoopReferencesFirst()22 static int $noinline$SecondInnerLoopReferencesFirst() { 23 int f = 0; 24 for (int outer = 0; outer < 5; outer++) { 25 // This will create a Phi[const_3, const_1] that we eliminate in loop optimization 26 byte ab = 3; 27 // This loop will be eliminated but the next loop will be referencing this one as the 28 // `ab` is used in the addition below, which used to lead to a crash. The reason for the 29 // crash is that we are not updating the induction variables correctly and they are 30 // pointing to a deleted instruction. 31 for (int first_inner = 0; first_inner < 5; first_inner++) { 32 ab = 1; 33 } 34 byte i = 0; 35 for (int second_inner = 0; second_inner < 10; second_inner++) { 36 i += ab; 37 } 38 f += (int) i; 39 } 40 return f; 41 } 42 assertIntEquals(int expected, int result)43 public static void assertIntEquals(int expected, int result) { 44 if (expected != result) { 45 throw new Error("Expected: " + expected + ", found: " + result); 46 } 47 } 48 } 49