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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 void main(String[] args) {
System.out.println(test().intValue());
}
/// CHECK-START: java.lang.Integer Main.test() ssa_builder (after)
/// CHECK-DAG: <<Method:[ij]\d+>> CurrentMethod
/// CHECK-DAG: <<Const2P20:i\d+>> IntConstant 1048576
/// CHECK-DAG: <<ConstM1:i\d+>> IntConstant -1
/// CHECK-DAG: <<Array:l\d+>> NewArray [<<Const2P20>>,<<Method>>]
/// CHECK-DAG: <<NullCheck1:l\d+>> NullCheck [<<Array>>]
/// CHECK-DAG: <<Length1:i\d+>> ArrayLength [<<NullCheck1>>]
/// CHECK-DAG: <<Index:i\d+>> Add [<<Length1>>,<<ConstM1>>]
/// CHECK-DAG: <<NullCheck2:l\d+>> NullCheck [<<Array>>]
/// CHECK-DAG: <<Length2:i\d+>> ArrayLength [<<NullCheck2>>]
/// CHECK-DAG: <<BoundsCheck:i\d+>> BoundsCheck [<<Index>>,<<Length2>>]
/// CHECK-DAG: <<LastElement:l\d+>> ArrayGet [<<NullCheck2>>,<<BoundsCheck>>]
/// CHECK-DAG: Return [<<LastElement>>]
/// CHECK-START: java.lang.Integer Main.test() register (before)
/// CHECK-DAG: <<Method:[ij]\d+>> CurrentMethod
/// CHECK-DAG: <<Const2P20:i\d+>> IntConstant 1048576
/// CHECK-DAG: <<Const2P20M1:i\d+>> IntConstant 1048575
/// CHECK-DAG: <<Array:l\d+>> NewArray [<<Const2P20>>,<<Method>>]
/// CHECK-DAG: <<LastElement:l\d+>> ArrayGet [<<Array>>,<<Const2P20M1>>]
/// CHECK-DAG: Return [<<LastElement>>]
public static Integer test() {
Integer[] integers = new Integer[1024 * 1024];
initIntegerArray(integers);
// Array load with a large constant index (after constant folding
// and bounds check elimination).
Integer last_integer = integers[integers.length - 1];
return last_integer;
}
public static void initIntegerArray(Integer[] integers) {
for (int i = 0; i < integers.length; ++i) {
integers[i] = new Integer(i);
}
}
}
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