* pa.c (pa_reorg): If TARGET_BIG_SWITCH, then do not explode
        ADDR_VEC insns.  Slightly rework code which explodes ADDR_VEC
        insns.
        * pa.h (TARGET_BIG_SWITCH): Define.
        (TARGET_SWITCHES): Add "big-switch" and "no-big-switch".
        (CASE_VECTOR_MODE): Use TI or DI depending on TARGET_BIG_SWITCH.
        (CASE_DROPS_THROUGH): Remove definition.
        (ASM_OUTPUT_ADDR_VEC_ELT): Rewrite to handle TARGET_BIG_SWITCH.
        (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
        * pa.md (casesi): Rework to avoid some potential long branch
        problems (also makes generated code faster!).  Handle
        TARGET_BIG_SWITCH.
        (casesi0): Corresponding changes.

From-SVN: r14528