54 lines
1.7 KiB
Java
54 lines
1.7 KiB
Java
/*
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* Copyright (C) 2021 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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class Main {
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public static void $noinline$testMain(Main m) {
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expectEquals(0, m.myField);
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}
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public static void main(String[] args) {
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$noinline$doTest(true);
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$noinline$doTest(false);
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}
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public static void $noinline$doTest(boolean testValue) {
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Main m = new Main();
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// LSE will find that this store can be removed, as both branches override the value with a new
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// one.
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m.myField = 42;
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if (testValue) {
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// LSE will remove this store as well, as it's the value after the store of 42 is removed.
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m.myField = 0;
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// This makes sure `m` gets materialized. At this point, the bug is that the partial LSE
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// optimization thinks the value incoming this block for `m.myField` is 42, however that
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// store, as well as the store to 0, have been removed.
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$noinline$testMain(m);
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} else {
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m.myField = 3;
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expectEquals(3, m.myField);
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}
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}
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public static void expectEquals(int expected, int actual) {
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if (expected != actual) {
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throw new Error("Expected " + expected + ", got " + actual);
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}
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}
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int myField = 0;
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}
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