RFR: 8362504: AArch64: Replace MOVZ+MOVK+MOVK with ADRP+ADD

[Andrew Dinn]

On Wed, 20 Aug 2025 08:44:30 GMT, Andrew Haley <aph at openjdk.org> wrote:

> OK, so we should not commit this patch. it's not worth it.

I think Andrew is right that the gain here is too small to justify the extra complexity this adds, including for  AOT code. There is no clear performance difference between the two variants across different micro-architectures. The saving in instruction count is real but is not going to be very significant (pointer moves are rare and not all of them will be susceptible to this optimization).

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PR Comment: https://git.openjdk.org/jdk/pull/26653#issuecomment-3205716082