RFR: 8287522: StringConcatFactory: Add in prependers and mixers in batches [v4]

[Claes Redestad]

On Wed, 1 Jun 2022 20:51:50 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> Claes Redestad has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Address review comments from @ExE-Boss
>
> src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java line 459:
> 
>> 457:             String prefix = constants.get(0);
>> 458:             if (prefix == null) {
>> 459:                 if (suffix == null) {
> 
> Is it possible for prefix or suffix an empty string (non-null)?   The original code checks `if (constant.isEmpty())`

No: Empty string constants would lead to adding a null to the list of constants in the prologue.

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PR: https://git.openjdk.java.net/jdk/pull/8855