RFR: 8348411: C2: Remove the control input of LoadKlassNode and LoadNKlassNode [v4]

[Quan Anh Mai]

On Tue, 4 Feb 2025 18:43:04 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   format
>
> src/hotspot/share/opto/parseHelper.cpp line 193:
> 
>> 191:       // See issue JDK-8057622 for details.
>> 192: 
>> 193:     always_see_exact_class = true;
> 
> Why is it ok to remove this?
> If this branch is not taken, it used to be `false`, and would lead to something different below...

The only use of this is to decide if we need to attach a control input to the `LoadKlass`. As the control input is not needed, this can be removed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23274#discussion_r1941735400