RFR: 8283187: C2: loop candidate for superword not always unrolled fully if superword fails [v2]

[Roland Westrelin]

On Wed, 23 Mar 2022 07:08:11 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

> That looks good!

Thanks for the review @chhagedorn

> src/hotspot/share/opto/superword.cpp line 129:
> 
>> 127:   // skip any loop that has not been assigned max unroll by analysis
>> 128:   if (do_optimization) {
>> 129:     if (SuperWordLoopUnrollAnalysis && cl->slp_max_unroll() == 0) return false;
> 
> While at it, you could also add braces for the one liner ifs.

Should be done in the new commit

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PR: https://git.openjdk.java.net/jdk/pull/7822