Integrated: 8348678: [PPC64] C2: unaligned vector load/store is ok

[Richard Reingruber]

On Mon, 27 Jan 2025 16:04:33 GMT, Richard Reingruber <rrich at openjdk.org> wrote:

> This pr changes `Matcher::misaligned_vectors_ok`  to return `true` on PPC64 for better vectorization during `SuperWord`.
> IR checking of the corresponding test `TestCastX2NotProcessedIGVN.java` is also enabled.
> 
> Tested with `TestCastX2NotProcessedIGVN.java`
> 
> The change passed our CI testing:
> Tier 1-4 of hotspot and jdk. All of langtools and jaxp. Renaissance Suite and SAP specific tests.
> Testing was done on the main platforms and also on Linux/PPC64le and AIX.

This pull request has now been integrated.

Changeset: 1a8212e1
Author:    Richard Reingruber <rrich at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/1a8212e1018744b360df310e85fc29f8c41f5072
Stats:     12 lines in 3 files changed: 5 ins; 0 del; 7 mod

8348678: [PPC64] C2: unaligned vector load/store is ok
8343906: test2 of compiler/c2/TestCastX2NotProcessedIGVN.java fails on some platforms

Reviewed-by: mdoerr, amitkumar

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PR: https://git.openjdk.org/jdk/pull/23318