Integrated: 8297445: PPC64: Represent Registers as values

[Martin Doerr]

On Tue, 22 Nov 2022 18:10:42 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> The recent Register implementation uses wild pointer (including null pointer) dereferences which exhibit undefined behavior. We should migrate away from pointer-based representation of Register values as it was done for x86 ([JDK-8292153](https://bugs.openjdk.org/browse/JDK-8292153)). Problems exist when trying to build with GCC 11 ([JDK-8297426](https://bugs.openjdk.org/browse/JDK-8297426)).
> Note: Implicit conversion from `intptr_t` to `RegisterOrConstant` is no longer supported. That's why I had to replace some `add` instructions.

This pull request has now been integrated.

Changeset: 9c77e41b
Author:    Martin Doerr <mdoerr at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/9c77e41b81ebd28bd92ea7adad605981a5519046
Stats:     824 lines in 13 files changed: 163 ins; 429 del; 232 mod

8297445: PPC64: Represent Registers as values

Reviewed-by: mbaesken, rrich

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PR: https://git.openjdk.org/jdk/pull/11297