/*
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* Copyright (C) 2016 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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public class Main {
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public static void main(String[] args) {
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Object[] array = { new Integer(1), new Integer(2), new Integer(3) };
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int result = test(array, 0, 2);
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System.out.println(result);
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}
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// This test method uses two integers (`index1` and `index2`) to
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// force the register allocator to use some high registers (R8-R15)
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// on x86-64 in the code generated for the first CheckCast (which
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// converts `new_array` to an `Object[]`), so as to produce code
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// containing a conditional jump whose offset does not fit in a
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// NearLabel when using Baker's read barrier fast path (because
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// x86-64 instructions using these high registers have a larger
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// encoding).
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//
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// The intent of this artifical constraint is to ensure the initial
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// failure is properly tested by this regression test.
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/// CHECK-START: int Main.test(java.lang.Object, int, int) register (after)
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/// CHECK-DAG: CheckCast check_kind:array_object_check
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/// CHECK-DAG: CheckCast check_kind:exact_check
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/// CHECK-DAG: CheckCast check_kind:exact_check
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static public int test(Object new_array, int index1, int index2) {
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Object[] objectArray = (Object[]) new_array;
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Integer integer1 = (Integer) objectArray[index1];
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Integer integer2 = (Integer) objectArray[index2];
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return integer1.intValue() + integer2.intValue();
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}
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}
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