RFR: 8289943: Simplify some object allocation merges [v10]

[Cesar Soares Lucas]

On Wed, 28 Sep 2022 00:52:43 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Cesar Soares Lucas has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Addressing PR feedback. Added new constraint for case of merging SR and NSR allocations.
>
> src/hotspot/share/opto/output.cpp line 860:
> 
>> 858:     if (sv == NULL) {
>> 859:       ciKlass* cik = t->isa_instptr() != NULL ? t->isa_instptr()->instance_klass()
>> 860:                                               : t->is_oopptr()->exact_klass();
> 
> Why this change? Add comment.

This is not necessary for this version. I'll rever the change.

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PR: https://git.openjdk.org/jdk/pull/9073