RFR: 8315066: Add unsigned bounds and known bits to TypeInt/Long [v13]

[Quan Anh Mai]

On Thu, 5 Sep 2024 16:24:17 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - rename tests
>>  - more explanation
>
> src/hotspot/share/opto/type.cpp line 1705:
> 
>> 1703: bool TypeInt::empty(void) const {
>> 1704:   return false;
>> 1705: }
> 
> I would like to see assert(_lo <= _hi) here since you unconditionally return `false`.

`_lo <= _hi` (and other invariants) is checked in `verify_constraints` when creating the `TypeInt` instance.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17508#discussion_r1745868702