Yudi Zheng

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[GR-53920] Use hashed lookup in the secondary supers array.

In preparation of secondary_super_cache removal, we are adapting the hashed lookup in the secondary supers array. Still, we have some code checking if super_check_offset is equal to offset of _secondary_super_cache....

Avoid random access values for operands in not-yet-specified instructions.

> Please rebase ontop of `next`. done

8331429: [JVMCI] Cleanup JVMCIRuntime allocation routines

Thanks for the review!

8331429: [JVMCI] Cleanup JVMCIRuntime allocation routines

/integrate

[GR-53920] Use hashed lookup in the secondary supers array.

Once @theRealAph integrated the jdk21u PR, we will enable it in Graal when updating to the next JDK 21 build. ``` diff --git a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/hotspot/replacements/TypeCheckSnippetUtils.java b/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/hotspot/replacements/TypeCheckSnippetUtils.java index cbb342cebda..489566385f4 100644 --- a/compiler/src/jdk.graal.compiler/src/jdk/graal/compiler/hotspot/replacements/TypeCheckSnippetUtils.java...

8331341: secondary_super_cache does not scale well: C1 and interpreter

Graal-side change is ready

[WIP][GR-55709] Adapt fibers changes: use JavaThread::_lock_id as monitor owner.

@AlanBateman I checked [the fibers changes](https://github.com/openjdk/loom/pull/210) and it seems like the JIT support is quite trivial. In this PR I have updated Graal's inlined monitorenter/exit code to respect `JavaThread::_lock_id`, and...

8305895: Implement JEP 450: Compact Object Headers (Experimental)

Could you please cherry pick https://github.com/mur47x111/jdk/commit/c45ebc2a89d0b25a3dd8cc46386e37a635ff9af2 for the JVMCI support?

8350177: C2 SuperWord: Integer.numberOfLeadingZeros, numberOfTrailingZeros, reverse and bitCount have input types wrongly turncated for byte and short

Since the base is before the branch off, could you please merge master before integration and see if GHA still passes? This also helps us testing libgraal compilation.