RFR: 8339113: AccessFlags can be u2 in metadata [v5]

[Coleen Phillimore]

On Wed, 25 Dec 2024 16:34:27 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> It wasn't the logic.  When I went through I didn't know if this instruction needed fixing because we loaded an unsigned short instead of an int.  So I left myself a note to look at it again that you noticed and I didn't in my final walk through.  It seems right but maybe someone with ppc knowledge can answer this.
>> 
>> 
>>     rldicl_(R0, Raccess_flags, 64-JVM_ACC_SYNCHRONIZED_BIT, 63); // Extract bit and compare to 0.
>
> The instruction looks still correct. We are checking the same bit of the 64 bit register as before. (Using `testbitdi` would also work.)

I changed this to testbitdi.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22246#discussion_r1900836026