[jdk18] RFR: 8279930: Synthetic cast causes generation of store barriers when using heap segments

[Maurizio Cimadamore]

On Wed, 12 Jan 2022 19:05:30 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

>> src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/HeapMemorySegmentImpl.java line 89:
>> 
>>> 87:     public static class OfByte extends HeapMemorySegmentImpl {
>>> 88: 
>>> 89:         OfByte(long offset, Object base, long length, int mask) {
>> 
>> Is it possible to retain the array type for the constructor?
>
> yes, that should be harmless

Actually, no, sorry. If I sharpen the type, then `dup` has to cast, so we go back to the original issue.

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PR: https://git.openjdk.java.net/jdk18/pull/97