/* * Copyright (C) 2017 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static void main(String[] args) { System.out.println(test(0L)); } public static long testField = 0; public static long longField0 = 0; public static long longField1 = 0; public static long longField2 = 0; public static long longField3 = 0; public static long longField4 = 0; public static long longField5 = 0; public static long longField6 = 0; public static long longField7 = 0; /// CHECK-START-ARM: int Main.test(long) register (after) /// CHECK: TypeConversion locations:[#-8690466096623102344]->{{.*}} public static int test(long other) { // To avoid constant folding TypeConversion(const), hide the constant in a field. Then, hide // it even more inside a Select that can only be reduced after LSE+InstructionSimplifier. We // don't run constant folding after that. testField = 0x8765432112345678L; long value = testField; if (value + 1 == 0x8765432112345679L) { value = testField; } else { value = other; } // Now, the `value` is in a register because of the store but we need // a constant location to trigger the bug, so load a bunch of other fields. long l0 = longField0; long l1 = longField1; long l2 = longField2; long l3 = longField3; long l4 = longField4; long l5 = longField5; long l6 = longField6; long l7 = longField7; if (l0 != 0 || l1 != 0 || l2 != 0 || l3 != 0 || l4 != 0 || l5 != 0 || l6 != 0 || l7 != 0) { throw new Error(); } // Do the conversion from constant location. return (int) value; } }