RFR: 8310190: C2 SuperWord: AlignVector is broken, generates misaligned packs

[Fei Gao]

On Mon, 13 Nov 2023 06:37:41 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Would you mind re-running testing on your platforms? (I ran on x64 and aarch64 without SVE)

Hi @eme64 , I've submitted testing on aarch64 (sve) and arm32 separately. Let's wait for results.

> @fg1417 I don't know aarch64 very well. Would you want to create a matching-rule for aarch64 for `VerifyVectorAlignment`, similar to what I did in `x86.ad`? It is not necessary, but could be nice.

Of course, I will create the matching rule for aarch64. BTW, what kind of testing have you done for `VerifyVectorAlignment` to see if it works as expected? Then I can verify it as well on aarch64.

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PR Comment: https://git.openjdk.org/jdk/pull/14785#issuecomment-1807672067