RFR: Load coops base shift from AOTRuntimeConstants in AOT code [v4]

[Andrew Haley]

On Wed, 25 Sep 2024 13:58:15 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> This PR modifies AOT compiled method code to load compressed oops base and shift constants via the AOTRuntimeConstants area rather than encode them as immediates. It also unlatches the currently forced setting of UseCompatibleCompressedOops, allowing the heap to be allocated wherever it will fit.
>
> Andrew Dinn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix oop decode not to side-effect flags

src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp line 5130:

> 5128:     }
> 5129:   }
> 5130:   return tmp;

Suggestion:

  auto tmps = RegSet::of(r0, r1, r2) - RegSet::of(src, dest);
  return tmps.first();

Use the force, Luke Skywalker.

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PR Review Comment: https://git.openjdk.org/leyden/pull/20#discussion_r1776647545