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8316105: C2: Back to back Parse Predicates from different loops but w…
…ith same deopt reason are wrongly grouped together
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test/hotspot/jtreg/compiler/predicates/TestBackToBackParsePredicates.java
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/* | ||
* Copyright (c) 2023, 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. | ||
* | ||
*/ | ||
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/* | ||
* @test | ||
* @bug 8316105 | ||
* @library /test/lib | ||
* @summary Test that back to back Parse Predicates with same deopt reason are not grouped together | ||
* @run main/othervm -Xbatch compiler.predicates.TestBackToBackParsePredicates | ||
*/ | ||
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package compiler.predicates; | ||
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import jdk.test.lib.Asserts; | ||
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public class TestBackToBackParsePredicates { | ||
static long lFld; | ||
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public static void main(String[] strArr2) { | ||
for (int i = -350; i <= 0; i++) { | ||
lFld = 30; | ||
test(i); | ||
check(); | ||
} | ||
lFld = 30; | ||
test(1); | ||
check(); | ||
} | ||
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// Inlined | ||
static void foo() { | ||
for (int i12 = 1; i12 < 5; i12++) { // Loop A | ||
lFld += 1; // Store S | ||
} | ||
} | ||
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static void test(int x) { | ||
foo(); | ||
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// After fully unrolling loop A and after next round of IGVN: | ||
// We wrongly treat two back to back Loop Limit Check Parse Predicates as single Predicate Block. We therefore | ||
// keep the Loop Parse Predicate of loop A: | ||
// | ||
// Loop Parse Predicate (of A) | ||
// Loop Limit Check Parse Predicate (of A) | | ||
// -> Store of lFld pinned here | Wrongly treated as single Predicate Block | ||
// Loop Limit Check Parse Predicate (of B) | | ||
for (int i = 7; i < 212; i++) { // Loop B | ||
for (int j = 1; j < 80; j++) { | ||
switch (x % 8) { | ||
case 0: | ||
case 2: | ||
break; | ||
case 6: | ||
case 7: | ||
} | ||
} | ||
} | ||
} | ||
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static void check() { | ||
Asserts.assertEQ(34L, lFld); | ||
} | ||
} |