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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 {
/*
* Ensure an inlined static invoke explicitly triggers the
* initialization check of the called method's declaring class, and
* that the corresponding load class instruction does not get
* removed before register allocation & code generation.
*/
// CHECK-START: void Main.invokeStaticInlined() builder (after)
// CHECK-DAG: [[LoadClass:l\d+]] LoadClass
// CHECK-DAG: [[ClinitCheck:l\d+]] ClinitCheck [ [[LoadClass]] ]
// CHECK-DAG: InvokeStaticOrDirect [ [[ClinitCheck]] ]
// CHECK-START: void Main.invokeStaticInlined() inliner (after)
// CHECK-DAG: [[LoadClass:l\d+]] LoadClass
// CHECK-DAG: [[ClinitCheck:l\d+]] ClinitCheck [ [[LoadClass]] ]
// CHECK-START: void Main.invokeStaticInlined() inliner (after)
// CHECK-NOT: InvokeStaticOrDirect
// The following checks ensure the clinit check instruction added by
// the builder is pruned by the PrepareForRegisterAllocation, while
// the load class instruction is preserved. As the control flow
// graph is not dumped after (nor before) this step, we check the
// CFG as it is before the next pass (liveness analysis) instead.
// CHECK-START: void Main.invokeStaticInlined() liveness (before)
// CHECK-DAG: LoadClass
// CHECK-START: void Main.invokeStaticInlined() liveness (before)
// CHECK-NOT: ClinitCheck
// CHECK-NOT: InvokeStaticOrDirect
static void invokeStaticInlined() {
ClassWithClinit1.$opt$inline$StaticMethod();
}
static class ClassWithClinit1 {
static {
System.out.println("Main$ClassWithClinit1's static initializer");
}
static void $opt$inline$StaticMethod() {
}
}
/*
* Ensure a non-inlined static invoke eventually has an implicit
* initialization check of the called method's declaring class.
*/
// CHECK-START: void Main.invokeStaticNotInlined() builder (after)
// CHECK-DAG: [[LoadClass:l\d+]] LoadClass
// CHECK-DAG: [[ClinitCheck:l\d+]] ClinitCheck [ [[LoadClass]] ]
// CHECK-DAG: InvokeStaticOrDirect [ [[ClinitCheck]] ]
// CHECK-START: void Main.invokeStaticNotInlined() inliner (after)
// CHECK-DAG: [[LoadClass:l\d+]] LoadClass
// CHECK-DAG: [[ClinitCheck:l\d+]] ClinitCheck [ [[LoadClass]] ]
// CHECK-DAG: InvokeStaticOrDirect [ [[ClinitCheck]] ]
// The following checks ensure the clinit check and load class
// instructions added by the builder are pruned by the
// PrepareForRegisterAllocation. As the control flow graph is not
// dumped after (nor before) this step, we check the CFG as it is
// before the next pass (liveness analysis) instead.
// CHECK-START: void Main.invokeStaticNotInlined() liveness (before)
// CHECK-DAG: InvokeStaticOrDirect
// CHECK-START: void Main.invokeStaticNotInlined() liveness (before)
// CHECK-NOT: LoadClass
// CHECK-NOT: ClinitCheck
static void invokeStaticNotInlined() {
ClassWithClinit2.staticMethod();
}
static class ClassWithClinit2 {
static {
System.out.println("Main$ClassWithClinit2's static initializer");
}
static boolean doThrow = false;
static void staticMethod() {
if (doThrow) {
// Try defeating inlining.
throw new Error();
}
}
}
/*
* Ensure an inlined call to a static method whose declaring class
* is statically known to have been initialized does not require an
* explicit clinit check.
*/
// CHECK-START: void Main$ClassWithClinit3.invokeStaticInlined() builder (after)
// CHECK-DAG: InvokeStaticOrDirect
// CHECK-START: void Main$ClassWithClinit3.invokeStaticInlined() builder (after)
// CHECK-NOT: LoadClass
// CHECK-NOT: ClinitCheck
// CHECK-START: void Main$ClassWithClinit3.invokeStaticInlined() inliner (after)
// CHECK-NOT: LoadClass
// CHECK-NOT: ClinitCheck
// CHECK-NOT: InvokeStaticOrDirect
static class ClassWithClinit3 {
static void invokeStaticInlined() {
// The invocation of invokeStaticInlined triggers the
// initialization of ClassWithClinit3, meaning that the
// hereinbelow call to $opt$inline$StaticMethod does not need a
// clinit check.
$opt$inline$StaticMethod();
}
static {
System.out.println("Main$ClassWithClinit3's static initializer");
}
static void $opt$inline$StaticMethod() {
}
}
/*
* Ensure an non-inlined call to a static method whose declaring
* class is statically known to have been initialized does not
* require an explicit clinit check.
*/
// CHECK-START: void Main$ClassWithClinit4.invokeStaticNotInlined() builder (after)
// CHECK-DAG: InvokeStaticOrDirect
// CHECK-START: void Main$ClassWithClinit4.invokeStaticNotInlined() builder (after)
// CHECK-NOT: LoadClass
// CHECK-NOT: ClinitCheck
// CHECK-START: void Main$ClassWithClinit4.invokeStaticNotInlined() inliner (after)
// CHECK-DAG: InvokeStaticOrDirect
// CHECK-START: void Main$ClassWithClinit4.invokeStaticNotInlined() inliner (after)
// CHECK-NOT: LoadClass
// CHECK-NOT: ClinitCheck
static class ClassWithClinit4 {
static void invokeStaticNotInlined() {
// The invocation of invokeStaticNotInlined triggers the
// initialization of ClassWithClinit4, meaning that the
// hereinbelow call to staticMethod does not need a clinit
// check.
staticMethod();
}
static {
System.out.println("Main$ClassWithClinit4's static initializer");
}
static boolean doThrow = false;
static void staticMethod() {
if (doThrow) {
// Try defeating inlining.
throw new Error();
}
}
}
// TODO: Add a test for the case of a static method whose declaring
// class type index is not available (i.e. when `storage_index`
// equals `DexFile::kDexNoIndex` in
// art::HGraphBuilder::BuildInvoke).
public static void main(String[] args) {
invokeStaticInlined();
invokeStaticNotInlined();
ClassWithClinit3.invokeStaticInlined();
ClassWithClinit4.invokeStaticNotInlined();
}
}
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