jdk8-mips64-public/hotspot: test/compiler/types/TypeSpeculation.java@b2ee5dc63353 (annotated)

test/compiler/types/TypeSpeculation.java@b2ee5dc63353 (annotated)

test/compiler/types/TypeSpeculation.java

Wed, 23 Oct 2013 12:40:23 +0200

author: roland
date: Wed, 23 Oct 2013 12:40:23 +0200
changeset 5991: b2ee5dc63353
child 6212: 29463147336b
permissions: -rw-r--r--

8024070: C2 needs some form of type speculation
Summary: record unused type profile information with type system, propagate and use it.
Reviewed-by: kvn, twisti

 /*
  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * @test
  * @bug 8024070
  * @summary Test that type speculation doesn't cause incorrect execution
  * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:TypeProfileLevel=222 TypeSpeculation
  *
  */
 public class TypeSpeculation {
     interface I {
     }
     static class A {
         int m() {
             return 1;
         }
     }
     static class B extends A implements I {
         int m() {
             return 2;
         }
     }
     static class C extends B {
         int m() {
             return 3;
         }
     }
     static int test1_invokevirtual(A a) {
         return a.m();
     }
     static int test1_1(A a) {
         return test1_invokevirtual(a);
     }
     static boolean test1() {
         A a = new A();
         B b = new B();
         C c = new C();
         // pollute profile at test1_invokevirtual to make sure the
         // compiler cannot rely on it
         for (int i = 0; i < 5000; i++) {
             test1_invokevirtual(a);
             test1_invokevirtual(b);
             test1_invokevirtual(c);
         }
         // profiling + speculation should make test1_invokevirtual
         // inline A.m() with a guard
         for (int i = 0; i < 20000; i++) {
             int res = test1_1(b);
             if (res != b.m()) {
                 System.out.println("test1 failed with class B");
                 return false;
             }
         }
         // check that the guard works as expected by passing a
         // different type
         int res = test1_1(a);
         if (res != a.m()) {
             System.out.println("test1 failed with class A");
             return false;
         }
         return true;
     }
     static int test2_invokevirtual(A a) {
         return a.m();
     }
     static int test2_1(A a, boolean t) {
         A aa;
         if (t) {
             aa = (B)a;
         } else {
             aa = a;
         }
         // if a of type B is passed to test2_1, the static type of aa
         // here is no better than A but the profiled type is B so this
         // should inline
         return test2_invokevirtual(aa);
     }
     static boolean test2() {
         A a = new A();
         B b = new B();
         C c = new C();
         // pollute profile at test2_invokevirtual to make sure the
         // compiler cannot rely on it
         for (int i = 0; i < 5000; i++) {
             test2_invokevirtual(a);
             test2_invokevirtual(b);
             test2_invokevirtual(c);
         }
         // profiling + speculation should make test2_invokevirtual
         // inline A.m() with a guard
         for (int i = 0; i < 20000; i++) {
             int res = test2_1(b, (i % 2) == 0);
             if (res != b.m()) {
                 System.out.println("test2 failed with class B");
                 return false;
             }
         }
         // check that the guard works as expected by passing a
         // different type
         int res = test2_1(a, false);
         if (res != a.m()) {
             System.out.println("test2 failed with class A");
             return false;
         }
         return true;
     }
     static int test3_invokevirtual(A a) {
         return a.m();
     }
     static void test3_2(A a) {
     }
     static int test3_1(A a, int i) {
         if (i == 0) {
             return 0;
         }
         // If we come here and a is of type B but parameter profiling
         // is polluted, both branches of the if below should have
         // profiling that tell us and inlining of the virtual call
         // should happen
         if (i == 1) {
             test3_2(a);
         } else {
             test3_2(a);
         }
         return test3_invokevirtual(a);
     }
     static boolean test3() {
         A a = new A();
         B b = new B();
         C c = new C();
         // pollute profile at test3_invokevirtual and test3_1 to make
         // sure the compiler cannot rely on it
         for (int i = 0; i < 3000; i++) {
             test3_invokevirtual(a);
             test3_invokevirtual(b);
             test3_invokevirtual(c);
             test3_1(a, 0);
             test3_1(b, 0);
         }
         // profiling + speculation should make test3_invokevirtual
         // inline A.m() with a guard
         for (int i = 0; i < 20000; i++) {
             int res = test3_1(b, (i % 2) + 1);
             if (res != b.m()) {
                 System.out.println("test3 failed with class B");
                 return false;
             }
         }
         // check that the guard works as expected by passing a
         // different type
         int res = test3_1(a, 1);
         if (res != a.m()) {
             System.out.println("test3 failed with class A");
             return false;
         }
         return true;
     }
     // Mix 2 incompatible profiled types
     static int test4_invokevirtual(A a) {
         return a.m();
     }
     static void test4_2(A a) {
     }
     static int test4_1(A a, boolean b) {
         if (b) {
             test4_2(a);
         } else {
             test4_2(a);
         }
         // shouldn't inline
         return test4_invokevirtual(a);
     }
     static boolean test4() {
         A a = new A();
         B b = new B();
         C c = new C();
         // pollute profile at test3_invokevirtual and test3_1 to make
         // sure the compiler cannot rely on it
         for (int i = 0; i < 3000; i++) {
             test4_invokevirtual(a);
             test4_invokevirtual(b);
             test4_invokevirtual(c);
         }
         for (int i = 0; i < 20000; i++) {
             if ((i % 2) == 0) {
                 int res = test4_1(a, true);
                 if (res != a.m()) {
                     System.out.println("test4 failed with class A");
                     return false;
                 }
             } else {
                 int res = test4_1(b, false);
                 if (res != b.m()) {
                     System.out.println("test4 failed with class B");
                     return false;
                 }
             }
         }
         return true;
     }
     // Mix one profiled type with an incompatible type
     static int test5_invokevirtual(A a) {
         return a.m();
     }
     static void test5_2(A a) {
     }
     static int test5_1(A a, boolean b) {
         if (b) {
             test5_2(a);
         } else {
             A aa = (B)a;
         }
         // shouldn't inline
         return test5_invokevirtual(a);
     }
     static boolean test5() {
         A a = new A();
         B b = new B();
         C c = new C();
         // pollute profile at test3_invokevirtual and test3_1 to make
         // sure the compiler cannot rely on it
         for (int i = 0; i < 3000; i++) {
             test5_invokevirtual(a);
             test5_invokevirtual(b);
             test5_invokevirtual(c);
         }
         for (int i = 0; i < 20000; i++) {
             if ((i % 2) == 0) {
                 int res = test5_1(a, true);
                 if (res != a.m()) {
                     System.out.println("test5 failed with class A");
                     return false;
                 }
             } else {
                 int res = test5_1(b, false);
                 if (res != b.m()) {
                     System.out.println("test5 failed with class B");
                     return false;
                 }
             }
         }
         return true;
     }
     // Mix incompatible profiled types
     static void test6_2(Object o) {
     }
     static Object test6_1(Object o, boolean b) {
         if (b) {
             test6_2(o);
         } else {
             test6_2(o);
         }
         return o;
     }
     static boolean test6() {
         A a = new A();
         A[] aa = new A[10];
         for (int i = 0; i < 20000; i++) {
             if ((i % 2) == 0) {
                 test6_1(a, true);
             } else {
                 test6_1(aa, false);
             }
         }
         return true;
     }
     // Mix a profiled type with an incompatible type
     static void test7_2(Object o) {
     }
     static Object test7_1(Object o, boolean b) {
         if (b) {
             test7_2(o);
         } else {
             Object oo = (A[])o;
         }
         return o;
     }
     static boolean test7() {
         A a = new A();
         A[] aa = new A[10];
         for (int i = 0; i < 20000; i++) {
             if ((i % 2) == 0) {
                 test7_1(a, true);
             } else {
                 test7_1(aa, false);
             }
         }
         return true;
     }
     // Mix a profiled type with an interface
     static void test8_2(Object o) {
     }
     static I test8_1(Object o) {
         test8_2(o);
         return (I)o;
     }
     static boolean test8() {
         A a = new A();
         B b = new B();
         C c = new C();
         for (int i = 0; i < 20000; i++) {
             test8_1(b);
         }
         return true;
     }
     // Mix a profiled type with a constant
     static void test9_2(Object o) {
     }
     static Object test9_1(Object o, boolean b) {
         Object oo;
         if (b) {
             test9_2(o);
             oo = o;
         } else {
             oo = "some string";
         }
         return oo;
     }
     static boolean test9() {
         A a = new A();
         for (int i = 0; i < 20000; i++) {
             if ((i % 2) == 0) {
                 test9_1(a, true);
             } else {
                 test9_1(a, false);
             }
         }
         return true;
     }
     static public void main(String[] args) {
         boolean success = true;
         success = test1() && success;
         success = test2() && success;
         success = test3() && success;
         success = test4() && success;
         success = test5() && success;
         success = test6() && success;
         success = test7() && success;
         success = test8() && success;
         success = test9() && success;
         if (success) {
             System.out.println("TEST PASSED");
         } else {
             throw new RuntimeException("TEST FAILED: erroneous bound check elimination");
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/types/TypeSpeculation.java@b2ee5dc63353 (annotated)

test/compiler/types/TypeSpeculation.java