[foreign-abi] RFR 8228486: Add ABI-specific layout constants

[Maurizio Cimadamore]

Updated webrev:

http://cr.openjdk.java.net/~mcimadamore/panama/8228486_v2/

Thanks for the comments so far

Maurizio

On 22/07/2019 18:23, Maurizio Cimadamore wrote:
> Hi,
> the recent push for JDK-8228447, as expected, broke the foreign-abi 
> branch, since that branch depended on the ValueLayout::isIntegral 
> accessor.
>
> This patch replaces that logic with the custom layout annotation logic 
> discussed in [1]:
>
> http://cr.openjdk.java.net/~mcimadamore/panama/8228486/
>
> This patch makes the following changes:
>
> * introduces three set of annotated layout constants, one for 
> supported ABI
> * the annotations point directly at the ABI-specific argument classes
> * I've consolidated ArgumentClass a bit, so that now there's a common, 
> ABI-agnostic super-interface with some general predicates
> * AddressLayout has been removed (we can just look for 
> argumentClass::isPointer)
> * the tests have been tweaked to use the new ABI-specific constants; 
> since the test has to work across platforms, all ABI test use a new 
> interface which imports the 'right' set of constants
>
> While the patch might be a bit raw (I've only tested on Linux x64), I 
> like where this is going.
>
> Maurizio
>
>
>