[jdk21u] RFR: 8314618: RISC-V: -XX:MaxVectorSize does not work as expected

[Gui Cao]

On Tue, 22 Aug 2023 03:08:46 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi, This issue also exists in the JDK21U, so i would like to backport this to jdk21u make -XX:MaxVectorSize work correctly on Linux RISC-V platform.
> `test/hotspot/jtreg/compiler/loopopts/superword/TestUnorderedReduction.java` passed with fastdebug and use build using qemu.

Got the push approval

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PR Comment: https://git.openjdk.org/jdk21u/pull/80#issuecomment-1689328077