[PATCH] Fix PR middle-end/32940, missing REG_POINTER on ARTIFICIAL decls

[Andrew_Pinski at PlayStation dot Sony dot Com]

Hi,
  The problem here is that with IV-OPTs (and other passes like PRE) 
creating temporary decls and those decls have artifical set on them.  This 
causes us not to mark the RTL reg with REG_POINTER so we get a "random" 
order for the load with index instruction under PowerPC.  This matters 
more for Power 6 than it does any where else.  Since the original reason 
why we decided not to mark them REG_POINTER 
(http://gcc.gnu.org/ml/gcc-patches/2004-06/msg00020.html) was because we 
would get the incorrect answer for pa-hppux has been removed with pointer 
plus, we can revert the patch which Jeff did to fix this.

This patch alone gives a 40% improvement on facerec.

This also changes cfgexpand.c which contains the same code now (this was 
added after Jeff's patch went in).

I would like someone (John?) bootstrap and test this on hppa-hpux for me?

OK?  Bootstrapped and tested on both i386-apple-darwin and 
powerpc64-linux-gnu with no regressions.

Thanks,
Andrew Pinski

ChangeLog:

        * cfgexpand.c  (expand_one_register_var): Mark pointer 
DECL_ARTIFICIAL
        as REG_POINTER also.
        * stmt.c (expand_decl): Likewise.

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