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Add functional test

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Credit to Eric Fang for writing the reproducer code, which I've used
verbatim in the test.
This commit is contained in:
Ashay Rane 2026-07-21 14:09:46 -05:00
parent 6e6ec30f22
commit 184fd27f0e
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2 changed files with 60 additions and 1 deletions
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2
src/hotspot/cpu/aarch64/aarch64.ad
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@ -2697,7 +2697,7 @@ static bool are_users_clone_compatible(Node* n, Node* m) {
bool Matcher::pd_clone_node(Node* n, Node* m, Matcher::MStack& mstack) {
if (is_vshift_con_pattern(n, m) ||
((is_vector_bitwise_not_pattern(n, m) ||
is_valid_sve_arith_imm_pattern(n, m)) &&
is_valid_sve_arith_imm_pattern(n, m)) &&
are_users_clone_compatible(n, m)) ||
is_vector_mask_not_operand_in_andnot_pattern(n, m) ||
is_encode_and_store_pattern(n, m)) {

59
test/hotspot/jtreg/compiler/c2/aarch64/TestSveClone.java Normal file
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@ -0,0 +1,59 @@
/*
* Copyright (c) 2026, Microsoft 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 8386697
* @summary Ensure that users of replicate nodes are clone compatible before folding
* @library /test/lib /
* @modules jdk.incubator.vector
* @requires vm.cpu.features ~= ".*sve.*"
* @run main/othervm --add-modules=jdk.incubator.vector -XX:-TieredCompilation
* -XX:CompileThreshold=100 -XX:-BackgroundCompilation
* -XX:CompileCommand=compileonly,${test.main.class}::test
* ${test.main.class}
*/
package compiler.c2.aarch64;
import jdk.incubator.vector.*;
public class TestSveClone {
static final VectorSpecies<Byte> SB = ByteVector.SPECIES_64;
static long test() {
return ByteVector.broadcast(SB, (byte) -8)
.lanewise(VectorOperators.XOR,
ByteVector.broadcast(SB, (byte) 0),
ByteVector.fromArray(SB, new byte[8], 0)
.compare(VectorOperators.EQ, (byte) 0))
.reduceLanesToLong(VectorOperators.OR);
}
public static void main(String[] args) {
for (int i = 0; i < 20000; i++) {
test();
}
IO.println("done");
}
}