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 ------------- Commit messages: - message - fix wrong types - micro problems - Add partial intrinsic for array constructors Changes: https://git.openjdk.org/jdk/pull/13735/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13735&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8156916 Stats: 241 lines in 6 files changed: 221 ins; 5 del; 15 mod Patch: https://git.openjdk.org/jdk/pull/13735.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/13735/head:pull/13735 PR: https://git.openjdk.org/jdk/pull/13735
