1 /* 2 * Copyright (C) 2017 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 public static void foo(float f) { 20 // The reason this used to break: 21 // 1) We inline the 'foo' call, so blocks now only contain HLoadClass instructions. 22 // 2) We then run the select_generator pass, which cannot change the 23 // if/else because blocks contain instructions. 24 // 3) We run GVN which will remove the HLoadClass instructions in the blocks. 25 // 4) At code generation, we are in the unlikely situation that a diamond shape 26 // contains no instruction (usually removed by select_generator). This used 27 // to trip the ARM code generators. 28 if (f < 1.2f) { 29 foo(Main.class, Object.class); 30 if (f < 0.2f) { 31 foo(Main.class, Object.class); 32 } else { 33 foo(Main.class, Object.class); 34 } 35 } else { 36 System.out.println("Hello World: " + f); 37 } 38 } 39 40 public static void foo(Object a, Object b) {} 41 42 public static void main(String[] args) { 43 foo(0f); 44 foo(4f); 45 foo(0.1f); 46 } 47 } 48
