/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Regression test on ARM-scheduling/array-aliasing bug (b/64018485).
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*/
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public class Main {
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//
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// Mimic original bug.
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//
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static void setFields(int[] fields) {
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if (fields == null || fields.length < 6)
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fields = new int[6]; // creates phi
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fields[5] = 127;
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}
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static void processFieldValues(int field0, int field1, int field2,
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int field3, int field4, int field5) {
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if (field5 != 127) {
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throw new Error("field = " + field5);
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} else if (field0 != 0) {
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processFieldValues(0, 0, 0, 0, 0, 0); // disable inlining
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}
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}
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static int doit(int pass) {
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int[] fields = new int[6];
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for (; ; pass++) {
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setFields(fields);
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processFieldValues(fields[0], fields[1], fields[2],
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fields[3], fields[4], fields[5]);
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if (pass == 0)
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break;
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}
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return fields[5];
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}
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//
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// Similar situation.
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//
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private static int aliasing(boolean f) {
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int[] array = new int[6];
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int[] array2 = null;
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int s = 0;
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for (int i = 0; i < 1; i++) {
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if (f) {
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array2 = array;
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}
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array2[1] = 4;
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s = array[1];
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}
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return s;
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}
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//
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// Main driver.
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//
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static public void main(String[] args) {
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int r = doit(0);
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int s = aliasing(true);
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System.out.println("passed " + r + " " + s);
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}
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}
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