Reducing code size on AM30 and AM33

[Alexandre Oliva]

According to Jeff Law, the main concern in the mn10300 port is code
size.  All costs are defined so as to generate smaller code.  I've
been playing with it a bit, and found out we can obtain significant
reductions in code size by defining an ADDRESS_COST function.  Here's
a summary of the changes in the size of the `.text' section in each
library.  The first number is the original size, the second is the
size after the patch.  A `v' in the beginning of the line indicates
the size decreased; a `^' indicates it increased.

v gcc/am33/libgcc.a 27587 27000
v gcc/libgcc.a 27627 27024
v mn10300-elf/am33/libiberty/libiberty.a 28031 27978
v mn10300-elf/am33/libio/libio.a 24547 24535
v mn10300-elf/am33/libio/libiostream.a 66798 64724
v mn10300-elf/am33/libstdc++/libstdc++.a 73722 70646
v mn10300-elf/am33/newlib/libc.a 48292 48235
v mn10300-elf/am33/newlib/libc/libc.a 46845 46788
v mn10300-elf/am33/newlib/libc/misc/lib.a 795 751
v mn10300-elf/am33/newlib/libc/stdio/lib.a 17331 17330
v mn10300-elf/am33/newlib/libc/syscalls/lib.a 364 352
v mn10300-elf/am33/newlib/libg.a 48292 48235
v mn10300-elf/libiberty/libiberty.a 27975 27922
v mn10300-elf/libio/libio.a 23738 23728
v mn10300-elf/libio/libiostream.a 65720 63773
v mn10300-elf/libstdc++/libstdc++.a 72645 69687
v mn10300-elf/newlib/libc.a 46972 46946
v mn10300-elf/newlib/libc/libc.a 45564 45538
v mn10300-elf/newlib/libc/misc/lib.a 779 762
^ mn10300-elf/newlib/libc/stdio/lib.a 17078 17080
v mn10300-elf/newlib/libc/syscalls/lib.a 363 352
v mn10300-elf/newlib/libg.a 46972 46946

Looks good, eh?  Ok to install?

-- 
Alexandre Oliva    Enjoy Guaraná, see http://www.ic.unicamp.br/~oliva/
Cygnus Solutions, a Red Hat company        aoliva@{redhat, cygnus}.com
Free Software Developer and Evangelist    CS PhD student at IC-Unicamp
oliva@{lsd.ic.unicamp.br, gnu.org}   Write to mailing lists, not to me