Integrated: 8332528: Generate code in SwitchBootstraps.generateTypeSwitch that require fewer adaptations

[Claes Redestad]

On Mon, 20 May 2024 10:52:27 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> We can fold the call to `Objects.checkIndex` into the code generated in generateTypeSwitchSkeleton instead of doing so by filtering the MH argument. This loads 9 less classes (of which 8 generated LFs and Species classes) on a minimal test, while being neutral on a throughput sanity test:
> 
> 
> Name                   Cnt  Base   Error   Test   Error  Unit  Change
> SwitchSanity.switchSum  15 8,162 ± 0,117  8,152 ± 0,131 ns/op   1,00x (p = 0,800 )
>   * = significant
>   ```
> 
> A few additional optimizations includes moving some seldom used `findStatic` calls to a holder. All in all this means a reduction by 22M cycles to bootstrap a trivial switch expression on my M1.

This pull request has now been integrated.

Changeset: 2581935b
Author:    Claes Redestad <redestad at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/2581935b47afaf661a94c8a8e50ce08065d632f6
Stats:     165 lines in 4 files changed: 125 ins; 14 del; 26 mod

8332528: Generate code in SwitchBootstraps.generateTypeSwitch that require fewer adaptations

Reviewed-by: liach, jlahoda

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PR: https://git.openjdk.org/jdk/pull/19307