objc data structure design

[Ziemowit Laski]

OK, I finally managed to get the C++ numbers Geoff requested; sorry it 
took so long.

Without patch:
20041203 usr FinderFE_COMPILATION 895.07(1.63)
20041203 usr FinderFE_SIZE 73695552
PCH: -rw-rw-r--    1 zlaski  admin  46080420 Dec  3 15:25 c++

With patch:
20041203 usr FinderFE_COMPILATION 897.43(9.76)
20041203 usr FinderFE_SIZE 73695552
PCH: -rw-rw-r--    1 zlaski  admin  46080420 Dec  3 18:01 c++

So, compile time regressed by 0.3%, with no increase in PCH size.   
This was done
on a 500 MHz G4 Power Mac, should anyone care.

I shall now do the C measurements. Stay tuned.

--Zem

> Index: c-tree.h
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/c-tree.h,v
> retrieving revision 1.187
> diff -u -p -u -p -r1.187 c-tree.h
> --- c-tree.h    11 Nov 2004 23:13:10 -0000      1.187
> +++ c-tree.h    23 Nov 2004 18:54:26 -0000
> @@ -73,6 +73,8 @@ struct lang_type GTY(())
>    /* In an ENUMERAL_TYPE, the min and max values.  */
>    tree enum_min;
>    tree enum_max;
> +  /* In a RECORD_TYPE, <insert proper comment here>.  */
> +  tree objc_protocol;
>  };
>
>  /* Record whether a type or decl was written with nonconstant size.
> Index: cp/cp-tree.h
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/cp/cp-tree.h,v
> retrieving revision 1.1070
> diff -u -p -u -p -r1.1070 cp-tree.h
> --- cp/cp-tree.h        10 Nov 2004 17:34:47 -0000      1.1070
> +++ cp/cp-tree.h        23 Nov 2004 18:54:28 -0000
> @@ -1060,6 +1060,9 @@ struct lang_type_class GTY(())
>    tree decl_list;
>    tree template_info;
>    tree befriending_classes;
> +
> +  /* <insert proper comment here>.  */
> +  tree objc_protocol;
>  };
>
>  struct lang_type_ptrmem GTY(())