8284944: assert(cnt++ < 40) failed: infinite cycle in loop optimization
Reviewed-by: kvn, chagedorn
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parent
e534c133af
commit
796494d0fe
src/hotspot/share/opto
test/hotspot/jtreg/compiler/loopopts
@ -2059,10 +2059,8 @@ void Compile::process_late_inline_calls_no_inline(PhaseIterGVN& igvn) {
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bool Compile::optimize_loops(PhaseIterGVN& igvn, LoopOptsMode mode) {
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if (_loop_opts_cnt > 0) {
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debug_only( int cnt = 0; );
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while (major_progress() && (_loop_opts_cnt > 0)) {
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TracePhase tp("idealLoop", &timers[_t_idealLoop]);
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assert( cnt++ < 40, "infinite cycle in loop optimization" );
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PhaseIdealLoop::optimize(igvn, mode);
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_loop_opts_cnt--;
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if (failing()) return false;
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@ -0,0 +1,125 @@
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/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8284944
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* @requires vm.compiler2.enabled
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* @summary triggers the loop optimization phase `LoopOptsCount` many times
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* @run main/othervm -Xcomp -XX:-PartialPeelLoop -XX:CompileCommand=compileonly,TestMaxLoopOptsCountReached::test TestMaxLoopOptsCountReached
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*/
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import java.lang.System.Logger.Level;
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public class TestMaxLoopOptsCountReached {
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static Long a = Long.valueOf(42);
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class A {
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static String e(long f, boolean b, String g, Level h, String s,
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Object... i) {
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return "message" + s + new String() + g;
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}
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}
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public static void main(String[] args) {
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test(null, "", null, null);
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test(null, "", null, null);
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}
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static void test(Integer o, String g, String name, Object obj) {
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for (Level q : Level.values())
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for (Level r : Level.values())
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A.e(a.longValue(), q != Level.OFF, g, null, null);
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for (Level q : Level.values())
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for (Level r : Level.values())
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A.e(a.longValue(), q != Level.OFF, g, null, null);
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for (Level q : Level.values()) {
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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}
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for (Level q : Level.values()) {
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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}
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for (Level q : Level.values()) {
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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for (Level r : Level.values())
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;
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}
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for (Level q : Level.values()) {
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for (Level r : Level.values())
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;
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for (Level r : Level.values())
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;
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}
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for (Level q : Level.values()) {
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for (Level r : Level.values()) {
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String msg = q + "message";
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String val =
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(q != Level.OFF || name != msg)
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? A.e(a.longValue(), q != Level.OFF, g, null, null, "foo")
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: null;
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}
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for (Level r : Level.values())
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;
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}
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for (Level q : Level.values()) {
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for (Level r : Level.values())
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;
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for (Level r : Level.values())
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;
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}
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}
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}
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