re PR rtl-optimization/23898 (basic block reordering excessively increases code size; get_uncond_jump_length pessimistic)

	PR rtl-optimization/23898
	* output.h (get_attr_min_length): Declare.
	* final.c (get_attr_length_1): New function, broken out of:
	(get_attr_length).
	(get_attr_min_length): New function.
	* bb-reorder.c (copy_bb_p, get_uncond_jump_length): Use it.
	(duplicate_computed_gotos): Likewise.
	* genattr.c (insn_min_length): Generate declaration.
	* genattrtab.c (min_fn, min_attr_value): New functions.
	(make_length_attrs): Generate insn_min_length.

From-SVN: r104468