* rtl.h (CC0_P): New.
        * gcse.c (cprop_jump): Use it with single_set.  Tweak dump text.
        (cprop_insn): Allow any mode register; use CC0_P.  CSE out single_set.
        (bypass_block): Save old dest block for dump text.
        (bypass_conditional_jumps): Allow any mode register; use CC0_P.
        Allow only true SET insns, not single_set.

From-SVN: r54178