RFR: 8328528: C2 should optimize long-typed parallel iv in an int counted loop [v18]

[Kangcheng Xu]

On Mon, 30 Sep 2024 12:21:49 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> Kangcheng Xu has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update TestParallelIvInIntCountedLoop.java
>
> test/hotspot/jtreg/compiler/loopopts/parallel_iv/TestParallelIvInIntCountedLoop.java line 349:
> 
>> 347:             // also test with random init and init2
>> 348:             int init1 = rng.nextInt();
>> 349:             int init2 = rng.nextInt(Integer.MIN_VALUE + i + 1, i); // Similarly, avoid (i - init2) from overflowing.
> 
> What does the "similarly" refer to? To comment line 347 or line 321? It's unclear to me. I would remove it.

Was refering to line 321. Updated comments.

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PR Review Comment: https://git.openjdk.org/jdk/pull/18489#discussion_r1781132739