RFR: 8347449: C2: UseLoopPredicate off should also turn UseProfiledLoopPredicate off [v5]

[Manuel Hässig]

On Thu, 27 Mar 2025 14:28:00 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> src/hotspot/share/opto/c2_globals.hpp line 790:
>> 
>>> 788:           "Move checks with an uncommon trap out of loops based on "        \
>>> 789:           "profiling data. "                                                \
>>> 790:           "Requires UseLoopPredicate to be turned on (default).")           \
>> 
>> Can you also update the comment for `UseLoopPredicate`? It seems outdated / wrong.
>> 
>> Now is:
>> `Generate a predicate to select fast/slow loop versions`
>> 
>> @chhagedorn do you have a good suggestion for what to put now?
>
> Good catch! It could be similar but without mentioning profiling data:
> 
> Move checks with an uncommon trap out of loops.

Fixed in [ca10148](https://github.com/openjdk/jdk/pull/24248/commits/ca101483aac17b0ace223df0f8a62bfd0dfa2e1f)

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PR Review Comment: https://git.openjdk.org/jdk/pull/24248#discussion_r2018190355