RFR: 8267904: C2 crash when compile negative Arrays.copyOf length after loop [v2]

[Hui Shi]

On Tue, 1 Jun 2021 07:51:08 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> simple example
>> 
>>         byte[] result = new byte[len];   // first CastII in GraphKit::new_array
>>         System.arraycopy(path, begin, result, 0, result.length);  // second CastII  when processing "result.length"
>
> Could you use hash_find() instead? hash_find(prev) == hash_find(cur) maybe?

Done.

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PR: https://git.openjdk.java.net/jdk/pull/4238