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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.
*/
interface Itf {
public Class sameInvokeInterface();
}
public class Main implements Itf {
public static void assertEquals(Object expected, Object actual) {
if (expected != actual) {
throw new Error("Expected " + expected + ", got " + actual);
}
}
public static void main(String[] args) throws Exception {
System.loadLibrary(args[0]);
Main[] mains = new Main[3];
Itf[] itfs = new Itf[3];
itfs[0] = mains[0] = new Main();
itfs[1] = mains[1] = new Subclass();
itfs[2] = mains[2] = new OtherSubclass();
// Make testInvokeVirtual and testInvokeInterface hot to get them jitted.
// We pass Main and Subclass to get polymorphic inlining based on calling
// the same method.
for (int i = 0; i < 10000; ++i) {
testInvokeVirtual(mains[0]);
testInvokeVirtual(mains[1]);
testInvokeInterface(itfs[0]);
testInvokeInterface(itfs[1]);
}
ensureJittedAndPolymorphicInline();
// At this point, the JIT should have compiled both methods, and inline
// sameInvokeVirtual and sameInvokeInterface.
assertEquals(Main.class, testInvokeVirtual(mains[0]));
assertEquals(Main.class, testInvokeVirtual(mains[1]));
assertEquals(Itf.class, testInvokeInterface(itfs[0]));
assertEquals(Itf.class, testInvokeInterface(itfs[1]));
// This will trigger a deoptimization of the compiled code.
assertEquals(OtherSubclass.class, testInvokeVirtual(mains[2]));
assertEquals(OtherSubclass.class, testInvokeInterface(itfs[2]));
}
public Class sameInvokeVirtual() {
field.getClass(); // null check to ensure we get an inlined frame in the CodeInfo
return Main.class;
}
public Class sameInvokeInterface() {
field.getClass(); // null check to ensure we get an inlined frame in the CodeInfo
return Itf.class;
}
public static Class testInvokeInterface(Itf i) {
return i.sameInvokeInterface();
}
public static Class testInvokeVirtual(Main m) {
return m.sameInvokeVirtual();
}
public Object field = new Object();
public static native void ensureJittedAndPolymorphicInline();
}
class Subclass extends Main {
}
class OtherSubclass extends Main {
public Class sameInvokeVirtual() {
return OtherSubclass.class;
}
public Class sameInvokeInterface() {
return OtherSubclass.class;
}
}
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