/*
* 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 .
*/
final class Final {
public String toString() {
return "final" ;
}
}
public class Main {
/// CHECK-START: Final Main.testKeepCheckCast(java.lang.Object, boolean) builder (after)
/// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object
/// CHECK: <<Class:l\d+>> LoadClass
/// CHECK: CheckCast [<<Phi>>,<<Class>>]
/// CHECK: <<Ret:l\d+>> BoundType [<<Phi>>] klass:Final
/// CHECK: Return [<<Ret>>]
/// CHECK-START: Final Main.testKeepCheckCast(java.lang.Object, boolean) instruction_simplifier (after)
/// CHECK: <<Phi:l\d+>> Phi
/// CHECK: <<Class:l\d+>> LoadClass
/// CHECK: CheckCast [<<Phi>>,<<Class>>]
/// CHECK: <<Ret:l\d+>> BoundType [<<Phi>>]
/// CHECK: Return [<<Ret>>]
public static Final testKeepCheckCast(Object o, boolean cond) {
Object x = new Final ();
while (cond) {
x = o;
cond = false ;
}
return (Final ) x;
}
/// CHECK-START: void Main.testKeepInstanceOf(java.lang.Object, boolean) builder (after)
/// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object
/// CHECK: <<Class:l\d+>> LoadClass
/// CHECK: InstanceOf [<<Phi>>,<<Class>>]
/// CHECK-START: void Main.testKeepInstanceOf(java.lang.Object, boolean) dead_code_elimination$initial (after)
/// CHECK: <<Phi:l\d+>> Phi
/// CHECK: <<Class:l\d+>> LoadClass
/// CHECK: InstanceOf [<<Phi>>,<<Class>>]
public static void testKeepInstanceOf(Object o, boolean cond) {
Object x = new Final ();
while (cond) {
x = o;
cond = false ;
}
if (x instanceof Final ) {
System.out.println("instanceof succeed" );
} else {
System.out.println("instanceof failed" );
}
}
/// CHECK-START: java.lang.String Main.testNoInline(java.lang.Object, boolean) builder (after)
/// CHECK: <<Phi:l\d+>> Phi klass:java.lang.Object
/// CHECK: <<NC:l\d+>> NullCheck [<<Phi>>]
/// CHECK: <<Ret:l\d+>> InvokeVirtual [<<NC>>] method_name:java.lang.Object.toString
/// CHECK: Return [<<Ret>>]
/// CHECK-START: java.lang.String Main.testNoInline(java.lang.Object, boolean) inliner (after)
/// CHECK: <<Phi:l\d+>> Phi
/// CHECK: <<NC:l\d+>> NullCheck [<<Phi>>]
/// CHECK: <<Ret:l\d+>> InvokeVirtual [<<NC>>] method_name:java.lang.Object.toString
/// CHECK: Return [<<Ret>>]
public static String testNoInline(Object o, boolean cond) {
Object x = new Final ();
while (cond) {
x = o;
cond = false ;
}
return x.toString();
}
public static void main(String[] args) {
try {
testKeepCheckCast(new Object(), true );
throw new Error("Expected check cast exception" );
} catch (ClassCastException e) {
// expected
}
testKeepInstanceOf(new Object(), true );
if ("final" .equals(testNoInline(new Object(), true ))) {
throw new Error("Bad inlining" );
}
}
}
Messung V0.5 in Prozent C=86 H=97 G=91
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-29)
¤
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