RFR: 8315762: Update subtype check profile collection on s390x following 8308869

[Martin Doerr]

On Wed, 17 Jan 2024 12:06:13 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> s390x Implementation for https://github.com/openjdk/jdk/pull/14375
> 
> Benchmark Result with patch: 
> 
> Benchmark                                         (typePollution)  (typePollutionNotInternalType)   Mode  Cnt     Score    Error   Units
> RequireNonNullCheckcastScalability.isDuplicated1            false                           false  thrpt   20  1155.409 ± 43.844  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1            false                            true  thrpt   20   726.923 ± 54.536  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1             true                           false  thrpt   20   676.462 ± 23.503  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1             true                            true  thrpt   20   118.650 ±  2.653  ops/us
> 
> 
> Without Patch: 
> 
> Benchmark                                         (typePollution)  (typePollutionNotInternalType)   Mode  Cnt     Score     Error   Units
> RequireNonNullCheckcastScalability.isDuplicated1            false                           false  thrpt   20  1101.248 ± 103.559  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1            false                            true  thrpt   20   109.690 ±   3.312  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1             true                           false  thrpt   20   110.790 ±   7.927  ops/us
> RequireNonNullCheckcastScalability.isDuplicated1             true                            true  thrpt   20   112.244 ±   6.889  ops/us
> 
> 
> Testing : Fastdebug build + tier1 tests

Looks correct AFAICS. Please make sure it is thoroughly tested before integrating. Especially the C1 code is sensitive to register clashes which may cause errors which are very hard to debug.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17461#pullrequestreview-1841493258