RFR: JDK-8306304: Fix xlc17 clang warnings in ppc and aix code [v2]

[JoKern65]

On Mon, 15 May 2023 09:32:26 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> I see, so `size` is kind of macro-like, and is just textually splicing its argument expression into another expression.
>> And without the added parens the resulting full expression for the assert isn't checking what's intended, due
>> to operator precedence.
>> 
>> This is in generated source; it might be better to find the code generator (somewhere in adlc) and change it
>> to add appropriate parens, as there may be other similar places (both here and for other platforms) that
>> aren't doing what's intended but are not triggering warnings.
>
> Such a fix of adlc is probably out of scope for this change though.  We should probably have a separate bug for that.

And what should I use as a workaround meanwhile to get our new compiler through?

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PR Review Comment: https://git.openjdk.org/jdk/pull/13953#discussion_r1193605092