Using C++11+ in hotspot

[Andrew Haley]

On 08/07/2018 06:48 AM, John Rose wrote:
> On Aug 6, 2018, at 9:54 PM, Martin Buchholz <martinrb at google.com> wrote:
>>
>> I don't know what is actually being copied here, but can't the underlying
>> type be atomic<address*> ?
> 
> Yes, if we are allowed to cast some random sequence of metadata
> words to atomic<address*>[]. 

We're not.  Well, we sort-of are because we use -fno-strict-aliasing, but that's
not standard C++11.  Do we care?  :-)

GCC builtins do what we need when we're using GCC, but then we don't need C++11.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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