RFR: 8322807: Eliminate -Wparentheses warnings in gc code

[Kim Barrett]

On Tue, 2 Jan 2024 08:56:24 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Please review this trivial change to eliminate a -Wparentheses warning.
>> This involved simply adding parentheses to make the implicit operator
>> precedence explicit.
>> 
>> Testing: mach5 tier1
>> 
>> Also ran mach5 tier1 with these changes in conjunction enabling -Wparentheses
>> and other changes needed to make that work.
>
> Good and trivial.

Thanks for the review @albertnetymk

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PR Comment: https://git.openjdk.org/jdk/pull/17212#issuecomment-1874613749