RFR: 8288022: c2: Transform (CastLL (AddL into (AddL (CastLL when possible [v2]

[Roland Westrelin]

On Mon, 20 Jun 2022 07:46:05 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update test/hotspot/jtreg/compiler/c2/irTests/TestPushAddThruCast.java
>>   
>>   Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>
>
> Looks correct. A second review would be good.

@TobiHartmann @vnkozlov thanks for the reviews

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PR: https://git.openjdk.org/jdk/pull/9139