[master] RFR: Load narrowKlass from header, AArch64 assembler implementation [v7]

[Andrew Haley]

On Tue, 1 Feb 2022 18:53:14 GMT, Roman Kennke <rkennke at openjdk.org> wrote:

> Thanks! I believe the trouble is that load_klass() is used in some C1 generated code paths, and C1 register allocator doesn't ignore rscratch1 and rscratch2. I may be wrong, though.

I hope you are! - None of the register allocators can touch the scratch registers. Lots of hand-written code depends on that.

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PR: https://git.openjdk.java.net/lilliput/pull/36