Bug ID: JDK-8312570 [TESTBUG] Jtreg compiler/loopopts/superword/TestDependencyOffsets.java fails on 512-bit SVE

Type: Bug
Component: hotspot
Sub-Component: compiler
Affected Version: 21,22

Priority: P4
Status: Resolved
Resolution: Fixed
OS: generic
CPU: aarch64

Submitted: 2023-07-24
Updated: 2025-01-10
Resolved: 2023-08-29

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JDK 21	JDK 22
21.0.7-oracleFixed	22 b13Fixed

In our recent tests on AArch64 CPUs with 512-bit SVE, we see Hotspot jtreg `compiler/loopopts/superword/TestDependencyOffsets.java` has a large number of IR check failures. The reason is that many of the test loops in the jtreg cannot be vectorized on 512-bit SVE due to data dependence but the test code assumes they can.

A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk21u-dev/pull/1311 Date: 2025-01-10 12:51:31 +0000
10-01-2025
Fix request [21u] I backport this for parity with 21.0.7-oracle. No risk, only a test change Trivial resolve needed. Tests pass.
10-01-2025
Changeset: e5ea9aa9 Author: Pengfei Li <pli@openjdk.org> Date: 2023-08-29 01:34:33 +0000 URL: https://git.openjdk.org/jdk/commit/e5ea9aa9aa446503fd92cdba0a9653593c958597
29-08-2023
ILW = Test fails due to missing vectorization (test bug), single test on AArch64 with 513-bit SVE, no workaround = MLH = P4
26-07-2023
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/15010 Date: 2023-07-25 07:42:59 +0000
25-07-2023