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 main(String[] args) { 20 System.out.println(test()); 21 } 22 23 public static long testField = 0; 24 public static long longField0 = 0; 25 public static long longField1 = 0; 26 public static long longField2 = 0; 27 public static long longField3 = 0; 28 public static long longField4 = 0; 29 public static long longField5 = 0; 30 public static long longField6 = 0; 31 public static long longField7 = 0; 32 33 /// CHECK-START-ARM: int Main.test() register (after) 34 /// CHECK: TypeConversion locations:[#-8690466096623102344]->{{.*}} 35 public static int test() { 36 // To avoid constant folding TypeConversion(const), hide the constant in a field. 37 // We do not run constant folding after load-store-elimination. 38 testField = 0x8765432112345678L; 39 long value = testField; 40 // Now, the `value` is in a register because of the store but we need 41 // a constant location to trigger the bug, so load a bunch of other fields. 42 long l0 = longField0; 43 long l1 = longField1; 44 long l2 = longField2; 45 long l3 = longField3; 46 long l4 = longField4; 47 long l5 = longField5; 48 long l6 = longField6; 49 long l7 = longField7; 50 if (l0 != 0 || l1 != 0 || l2 != 0 || l3 != 0 || l4 != 0 || l5 != 0 || l6 != 0 || l7 != 0) { 51 throw new Error(); 52 } 53 // Do the conversion from constant location. 54 return (int)value; 55 } 56 } 57
