[lworld] Integrated: 8324949: [lworld] Migrate compiler tests to new internal API

[Tobias Hartmann]

On Tue, 6 Feb 2024 07:56:57 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

> Similar to [JDK-8321293](https://bugs.openjdk.org/browse/JDK-8321293) for runtime, this PR converts all compiler tests to the new internal API.
> 
> **VM changes:**
> - Missing null checks in the interpreter, C1 and C2 for field access and withfield
> - Added C2 intrinsic for newNullRestrictedArray
> - Disabled some optimizations in C2, will be fixed by [JDK-8325106](https://bugs.openjdk.org/browse/JDK-8325106)
> - Improve constant buffer oop detection in C2
> - Removed `InlineTypeNode::Identity` which interfered with other optimizations
> 
> **Test changes:**
> - Converted all primitive classes to value class using the `@ImplicitlyConstructible` and `@LooselyConsistentValue` annotations
> - Removed `.ref`, `.val`, `.default`, `_withfield`
> - Converted all null-free fields to using the `@NullRestricted` annotation
> - Converted all null-free array allocations to using `ValueClass.newNullRestrictedArray`
> - Removed `-XX:+EnablePrimitiveClasses`
> - Removed `PrimitiveClass.asValueType`/`.asPrimaryType`
> - Removed final keywords where they are implicit
> - Removed "inline type", "inline class"
> - Adjusted IR rules and code that expects NPEs
> - Disabled some test and/or IR verification
> 
> Code marked with `TODO 8325106` will be addressed by follow-up change [JDK-8325106](https://bugs.openjdk.org/browse/JDK-8325106).
> 
> Thanks,
> Tobias

This pull request has now been integrated.

Changeset: a234de99
Author:    Tobias Hartmann <thartmann at openjdk.org>
URL:       https://git.openjdk.org/valhalla/commit/a234de99934f87da22185fb716996df5877c360f
Stats:     5953 lines in 96 files changed: 1671 ins; 1628 del; 2654 mod

8324949: [lworld] Migrate compiler tests to new internal API

-------------

PR: https://git.openjdk.org/valhalla/pull/991