test/698-selects/src/Main.java

/*
 * Copyright (C) 2019 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 int mZenMode = 0;

    public static int $noinline$foo(int internal, boolean check1, boolean check2) {
        int result = internal;
        if (check1) {
            // This block is to ensure `result` is a phi in the return block. Without this block
            // the compiler could just generate one block with selects.
            if (check2) {
                mZenMode = 42;
            }
            result = (internal == 1) ? 1 : 0;
        }
        // The optimization bug was to make the incorrect assumption that:
        //    phi = (internal, (internal == 1))
        // meant `internal` was a boolean.
        return result;
    }

    public static void main(String[] args) {
        int result = $noinline$foo(2, true, true);
        if (result != 0) {
            throw new Error("Expected 0, got " + result);
        }
    }
}