RFR: 8325746: Refactor Loop Unswitching code

Wed Feb 14 10:34:05 UTC 2024

On Wed, 14 Feb 2024 09:42:06 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> BTW: why do we not hoist exit conditions also? Would that not also be profitable? Just out of curiosity...

This can better be done with a simple loop peeling which can hoist the invariant checks. See:
https://github.com/openjdk/jdk/blob/0c2def0e3eaa4925746158294f798d37d42c50f3/src/hotspot/share/opto/loopTransform.cpp#L499-L502

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PR Review Comment: https://git.openjdk.org/jdk/pull/17842#discussion_r1489249400