RFR: 8320725: C2: Add "requires_strict_order" flag for floating-point add-reduction [v10]

[Emanuel Peter]

On Fri, 24 May 2024 08:30:38 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> test/hotspot/jtreg/compiler/c2/irTests/TestVectorFPReduction.java line 32:
>> 
>>> 30:  * @bug 8320725
>>> 31:  * @summary Ensure strictly ordered AddReductionVF/VD nodes are generated on SVE machines
>>> 32:  * while being disabled on Neon
>> 
>> Suggestion:
>> 
>>  *          while being disabled on Neon
>
> nit: we usually indent the second line with the start of the summary-text of the first line.

I would also like a more general summary here, that is less ARM specific. Talk more about `requires_strict_order` and `no_strict_order`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18034#discussion_r1613102744