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/*
* Copyright (C) 2016 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 Object[] getObjectArray() { return null; }
public static long[] getLongArray() { return null; }
public static Object getNull() { return null; }
public static void main(String[] args) {
try {
foo();
throw new Error("Expected NullPointerException");
} catch (NullPointerException e) {
// Expected.
}
}
/// CHECK-START: void Main.foo() load_store_elimination (after)
/// CHECK-DAG: <<Null:l\d+>> NullConstant
/// CHECK-DAG: <<Check:l\d+>> NullCheck [<<Null>>]
/// CHECK-DAG: <<Get1:j\d+>> ArrayGet [<<Check>>,{{i\d+}}]
/// CHECK-DAG: <<Get2:l\d+>> ArrayGet [<<Check>>,{{i\d+}}]
public static void foo() {
longField = getLongArray()[0];
objectField = getObjectArray()[0];
}
/// CHECK-START: void Main.bar() load_store_elimination (after)
/// CHECK-DAG: <<Null:l\d+>> NullConstant
/// CHECK-DAG: <<BoundType:l\d+>> BoundType [<<Null>>]
/// CHECK-DAG: <<CheckL:l\d+>> NullCheck [<<BoundType>>]
/// CHECK-DAG: <<GetL0:l\d+>> ArrayGet [<<CheckL>>,{{i\d+}}]
/// CHECK-DAG: <<GetL1:l\d+>> ArrayGet [<<CheckL>>,{{i\d+}}]
/// CHECK-DAG: <<GetL2:l\d+>> ArrayGet [<<CheckL>>,{{i\d+}}]
/// CHECK-DAG: <<GetL3:l\d+>> ArrayGet [<<CheckL>>,{{i\d+}}]
/// CHECK-DAG: <<CheckJ:l\d+>> NullCheck [<<Null>>]
/// CHECK-DAG: <<GetJ0:j\d+>> ArrayGet [<<CheckJ>>,{{i\d+}}]
/// CHECK-DAG: <<GetJ1:j\d+>> ArrayGet [<<CheckJ>>,{{i\d+}}]
/// CHECK-DAG: <<GetJ2:j\d+>> ArrayGet [<<CheckJ>>,{{i\d+}}]
/// CHECK-DAG: <<GetJ3:j\d+>> ArrayGet [<<CheckJ>>,{{i\d+}}]
public static void bar() {
// We create multiple accesses that will lead the bounds check
// elimination pass to add a HDeoptimize. Not having the bounds check helped
// the load store elimination think it could merge two ArrayGet with different
// types.
String[] array = ((String[])getNull());
objectField = array[0];
objectField = array[1];
objectField = array[2];
objectField = array[3];
long[] longArray = getLongArray();
longField = longArray[0];
longField = longArray[1];
longField = longArray[2];
longField = longArray[3];
}
public static long longField;
public static Object objectField;
}
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