Withdrawn: 8156916: intrinsify MethodHandles.arrayConstructor()

[Chen Liang]

On Sun, 30 Apr 2023 06:14:28 GMT, Chen Liang <liach at openjdk.org> wrote:

> Try to intrinsify MethodHandles.arrayConstructor for java.lang, java.lang.invoke, and java.util types, which InvokerBytecodeGenerator can refer to directly in a class constant.
> 
> In fact, the performance difference of Array.newInstance and anewarray is quite negligible per benchmark:
> 
> Benchmark                                                            Mode  Cnt     Score     Error  Units
> MethodHandlesArrayConstructorCall.baselineConstruct                  avgt    5     3.467 ±   0.163  ns/op
> MethodHandlesArrayConstructorCall.constantFoldConstruct              avgt    5     3.403 ±   0.070  ns/op
> MethodHandlesArrayConstructorCall.constantFoldNonInvocableConstruct  avgt    5     3.445 ±   0.231  ns/op
> MethodHandlesArrayConstructorCall.instanceConstruct                  avgt    5     4.034 ±   0.168  ns/op
> MethodHandlesArrayConstructorCall.instanceNonInvocableConstruct      avgt    5     4.038 ±   0.104  ns/op
> MethodHandlesArrayConstructorColdStart.testCreateInvocable             ss   10  1425.991 ± 308.216  us/op
> MethodHandlesArrayConstructorColdStart.testCreateNonInvocable          ss   10  1401.480 ± 258.402  us/op
> MethodHandlesArrayConstructorColdStart.testCreateObject                ss   10  1213.018 ± 166.522  us/op
> MethodHandlesArrayConstructorColdStart.testCreatePrimitive             ss   10  1163.461 ± 178.549  us/op

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/13735