RFA init_propagate_block_info abort

[Jim Wilson]

   (if_then_else (ne:CC (const_int 1 [0x1])
         (const_int 0 [0x0]))
     (label_ref 5304)
     (pc))

This RTL is not in canonical form, and thus it is likely incorrect.  This
should be an unconditional branch instead of a conditional branch.

Jim