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/*
* Copyright (C) 2015 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) {
$noinline$testWithNull(new Object[2]);
$noinline$testWithUnknown(new Object[2], new Object());
$noinline$testWithSame(new Object[2]);
$noinline$testWithSameRTI();
}
// Known null can eliminate the type check in early stages.
/// CHECK-START: void Main.$noinline$testWithNull(java.lang.Object[]) instruction_simplifier (before)
/// CHECK: ArraySet needs_type_check:true can_trigger_gc:true
/// CHECK-START: void Main.$noinline$testWithNull(java.lang.Object[]) instruction_simplifier (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
/// CHECK-START: void Main.$noinline$testWithNull(java.lang.Object[]) disassembly (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
public static void $noinline$testWithNull(Object[] o) {
o[0] = null;
}
/// CHECK-START: void Main.$noinline$testWithUnknown(java.lang.Object[], java.lang.Object) disassembly (after)
/// CHECK: ArraySet needs_type_check:true can_trigger_gc:true
public static void $noinline$testWithUnknown(Object[] o, Object obj) {
o[0] = obj;
}
// After GVN we know that we are setting values from the same array so there's no need for a type
// check.
/// CHECK-START: void Main.$noinline$testWithSame(java.lang.Object[]) instruction_simplifier$after_gvn (before)
/// CHECK: ArraySet needs_type_check:true can_trigger_gc:true
/// CHECK-START: void Main.$noinline$testWithSame(java.lang.Object[]) instruction_simplifier$after_gvn (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
/// CHECK-START: void Main.$noinline$testWithSame(java.lang.Object[]) disassembly (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
public static void $noinline$testWithSame(Object[] o) {
o[0] = o[1];
}
// We know that the array and the static Object have the same RTI in early stages. No need for a
// type check.
/// CHECK-START: java.lang.Object[] Main.$noinline$testWithSameRTI() instruction_simplifier (before)
/// CHECK: ArraySet needs_type_check:true can_trigger_gc:true
/// CHECK-START: java.lang.Object[] Main.$noinline$testWithSameRTI() instruction_simplifier (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
/// CHECK-START: java.lang.Object[] Main.$noinline$testWithSameRTI() disassembly (after)
/// CHECK: ArraySet needs_type_check:false can_trigger_gc:false
public static Object[] $noinline$testWithSameRTI() {
Object[] arr = new Object[1];
arr[0] = static_obj;
// Return so that LSE doesn't eliminate the ArraySet.
return arr;
}
static Object static_obj;
}
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