[jdk18] RFR: 8279998: PPC64 debug builds fail with "untested: RangeCheckStub: predicate_failed_trap_id"

[Aleksey Shipilev]

On Fri, 14 Jan 2022 12:14:06 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Redoing https://github.com/openjdk/jdk/pull/7077 for JDK 18.
> 
> Current mainline fails bootcycle-images build with hitting the `__ untested` assertion. Looking at how other platforms implemented the same block, I think PPC64 code is the same, and we are more or less safe with just dropping that assertion.
> 
> Additional testing:
>  - [x] Linux ppc64le fastdebug, `make bootcycle-images` (now passes)
>  - [x] Linux ppc64le fastdebug, `tier1` (passes modulo some environmental problems)
>  - [x] Linux ppc64le fastdebug, `tier2` (passes modulo some environmental problems)

All right, let's do this!

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PR: https://git.openjdk.java.net/jdk18/pull/101