RFR: ObjChunkedArrayTask enum constants overflow

[Roman Kennke]

Okidoki

Am 21. März 2017 14:49:19 MEZ schrieb Aleksey Shipilev <shade at redhat.com>:
>Hi,
>
>This is caught by MSVC x86_64. We apparently cannot use large enum
>constants,
>because they would not fit into whatever MSVC is allocating for enum
>type. I
>would scope the enum to use uintptr_t, but this is only available since
>C++11.
>The apparent way out is to keep only small enum constants, and inline
>others to
>get the typing right:
> http://cr.openjdk.java.net/~shade/shenandoah/build/tq-enums/webrev.01/
>
>While this affects 8u too, this patch is only for 9. This is because
>the amount
>of testing needed for Linux x86_64, i586, Windows x86_64. We will
>backport this
>to 8u once 9 builds fully on Windows x86_64.
>
>I eyeballed the compiled object code to see we still constant-fold
>these properly.
>
>Testing: builds on Linux x86_64, i586, Windows x86_64; Linux x86_64
>hotspot_gc_shenandoah.
>
>Thanks,
>-Aleksey

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