m68hc11.md ("decrement_and_branch_until_zero"): New pattern for dbcc/ibcc generation...

m68hc11.md ("decrement_and_branch_until_zero"): New pattern for dbcc/ibcc generation for 68HC12.

	* config/m68hc11/m68hc11.md ("decrement_and_branch_until_zero"): New
	pattern for dbcc/ibcc generation for 68HC12.
	("doloop_end"): New pattern.
	("m68hc12_dbcc_dec_hi"): New pattern for dbeq/dbne.
	("m68hc12_dbcc_inc_hi"): New pattern for ibeq/ibne.
	("m68hc12_dbcc_dec_qi"): New pattern.
	("m68hc12_dbcc_inc_qi"): New pattern.
	(split): Add split for the above when we can't use dbcc/ibcc due to
	reloading.
	(peephole2): Add peephole2 to generate the above when possible.

From-SVN: r65527