RFR: 8290981: Enable CDS for zero builds [v2]

[Aleksey Shipilev]

On Mon, 15 Aug 2022 07:54:18 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Good stuff. Actually, let me see how easy it is to implement the `nofast_*` bytecodes in Zero, so we don't have to do the shared-code exceptions for it.

That took some debugging :) But here it is, applied on top of your PR: https://cr.openjdk.java.net/~shade/8290981/zero-cds-nofast-1.patch -- builds Linux x86_64 Zero fine, this includes using the Zero VM to compile parts of JDK. I can do more testing later, we should at least test it bootcycles well.

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PR: https://git.openjdk.org/jdk/pull/9869