data type 'struct loop' in MELT

[Basile Starynkevitch]

On 05/14/2010 10:27 PM, Michael Raitza wrote:
>
> Up to now I have basic support up and running. The hash map to the loop
> is missing and I have not figured out yet what I need it for, but Basile
> mentioned it to be necessary to reliably attach data to the loop data
> type.


Actually, this is not really MELT specific but also concerns any plugin.

As a general case, most (& probably all) GCC data structures cannot be 
extended by plugins. So, for instance, a plugin cannot add its own field 
to the loop data. Likewise, another plugin cannot add a field to any 
gimple data structure. (More generally, most GCC data are not object 
oriented and cannot be extended by plugins).

So plugins (& MELT extensions) have to associate information to existing 
GCC data elsewhere. In MELT, there is some mechanism to build hash 
tables associating some main GCC data (gimple, tree, edge...) to 
arbitary MELT values.

Thanks for your interest in MELT.

Regards.


-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
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