RFR: 8302850: Implement C1 clone intrinsic that reuses arraycopy code for primitive arrays [v13]

[Galder Zamarreño]

On Wed, 8 May 2024 04:29:59 GMT, Galder Zamarreño <galder at openjdk.org> wrote:

>> @dean-long @rwestrel I've added the assert.
>
> The assert doesn't hold, e.g.
> 
> 
> === Output from failing command(s) repeated here ===
> * For target buildtools_create_symbols_javac__the.COMPILE_CREATE_SYMBOLS_batch:
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> #  Internal Error (/home/runner/work/jdk/jdk/src/hotspot/share/c1/c1_GraphBuilder.cpp:2031), pid=75212, tid=75244
> #  Error: assert(!!type->as_instance_klass()->is_interface()) failed
> #
> # JRE version: OpenJDK Runtime Environment (23.0) (fastdebug build 23-internal-galderz-306db7459b1316251e36d0eccc3035d11db44889)
> # Java VM: OpenJDK 64-Bit Server VM (fastdebug 23-internal-galderz-306db7459b1316251e36d0eccc3035d11db44889, mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
> # Problematic frame:
> # V  [libjvm.so+0x777cd0]  GraphBuilder::invoke(Bytecodes::Code)+0x1200
> 
> 
> Thoughts @rwestrel @dean-long?

Hmmm, the double `!!`... let me fix that and see.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17667#discussion_r1593369973