RFR: 8301630: C2: 8297933 broke type speculation in some cases [v2]

[Roland Westrelin]

On Thu, 23 Feb 2023 10:58:40 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   type system fix & test
>
> The update looks good to me, too!

@chhagedorn thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/12368