[jdk25u-dev] RFR: 8354244: Use random data in MinMaxRed_Long data arrays

[duke]

On Wed, 28 Jan 2026 22:01:17 GMT, Roland Mesde <duke at openjdk.org> wrote:

> Backporting JDK-8354244: Use random data in MinMaxRed_Long data arrays.
> 
> This PR simplifies test data in JDK-8307513 tests by switching from shaped data to random data, since the test verifies IR patterns during vectorization rather than branch behavior.
> 
> For parity with Oracle JDK.
> 
> Ran related tests on linux-x64, linux-aarch64, macos-aarch64 and windows-x64:
> 
> make test TEST=test/hotspot/jtreg/compiler/loopopts/superword/MinMaxRed_Long.java
> 
> Results attached:
> 
> [windows-x64-specific-test.log](https://github.com/user-attachments/files/24945701/windows-x64-specific-test.log)
> [macos-aarch64-specific-test.log](https://github.com/user-attachments/files/24945702/macos-aarch64-specific-test.log)
> [linux-x64-specific-test.log](https://github.com/user-attachments/files/24945703/linux-x64-specific-test.log)
> [linux-aarch64-specific-test.log](https://github.com/user-attachments/files/24945704/linux-aarch64-specific-test.log)

@rm-gh-8 
Your change (at version c732c7093c10d2d0b8549727972c39b97a2522ba) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk25u-dev/pull/197#issuecomment-3835832286