1 /* 2 * Copyright (C) 2019 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 mZenMode = 0; 19 $noinline$foo(int internal, boolean check1, boolean check2)20 public static int $noinline$foo(int internal, boolean check1, boolean check2) { 21 int result = internal; 22 if (check1) { 23 // This block is to ensure `result` is a phi in the return block. Without this block 24 // the compiler could just generate one block with selects. 25 if (check2) { 26 mZenMode = 42; 27 } 28 result = (internal == 1) ? 1 : 0; 29 } 30 // The optimization bug was to make the incorrect assumption that: 31 // phi = (internal, (internal == 1)) 32 // meant `internal` was a boolean. 33 return result; 34 } 35 main(String[] args)36 public static void main(String[] args) { 37 int result = $noinline$foo(2, true, true); 38 if (result != 0) { 39 throw new Error("Expected 0, got " + result); 40 } 41 } 42 } 43