Fixes to ipa branch

[Jan Hubicka]

> Hi,
> 
> This patch includes several fixes to ipa branch.
> The targhooks and rs6000 fixes are necessary for compilation on powerpc 
> and 
> also for testing the powerpc suite.

What are precisely those changes shooting for?  Is it something that can
be brought in by another merge?  (I am leaving for two weeks of vacation
at friday, so I will unlikely to be able to do it before that, but they
looks like something that is quite independent on IPA branch).
> 
> The rest of the changes refer to the dominance info (they were suggested 
> by Daniel Berlin a while ago)

My approach to dominance info so far has been to always calculate just
one (ie not have it privatized).  I am not oposed to privatizing it at
all (just we probably should be sure to not leave it hanging around all
CFGs for no good reason), but I wonder what do you need it for?

Honza
> 
> 
> 2006-08-23 Razya Ladelsky <razya@il.ibm.com>
> 
>         * targhooks.c (default_internal_arg_pointer): New function.
>         * dominance.c (dom_computed, n_bbs_in_dom_tree): Remove 
> definitions.
>         * fortran/decl.c (gfc_match_entry):Add missing declaration.
>         * function.h (dom_state): Add enumerator.
>         (dom_computed, n_bbs_in_dom_tree): Add new fields to function 
> struct,
>         add matching macros.
>         * basic-block.h (dom_state, dom_computed): Remove.
>         * config/rs6000/rs6000.c: Merge (partially) from mainline.
> 
>