[PATCH 3/3] add hash_map class

[Jan Hubicka]

> 
> On 06/20/2014 12:52 PM, tsaunders@mozilla.com wrote:
> >From: Trevor Saunders <tsaunders@mozilla.com>
> >
> >Hi,
> >
> >This patch adds a hash_map class so we can consolidate the boiler plate around
> >using hash_table as a map, it also allows us to get rid of pointer_map which I
> >do in this patch by converting its users to hash_map.
> 
> Hello Trev,
>    I like your changes! One small question about pointer_set, which is unable of deletion of items. Do you plan to migrate and simplify hash_map to be a replacement for pointer_set?

Note that pointer-map use in LTO is quite performance critical. It would be good to double
check that the new use of hash does not produce slower code.

Honza