committed in "smallish" steps. This step incorporates the switch to MEM_P,
REG_P, and CONST_INT_P. Use bool/true/false where appropriate. PRINT_OPERAND
moves from being a large macro in vax.h print_operand in vax.c. Fix rtx cost
for a constant of 0. This eliminates unneeded moves when setting to 0 would
be fine.
Lastly, include completely new (on by default) code for DImode move, addition,
and subtract. This code is significantly faster and smaller that what existed
before.
