* config/c4x/c4x.c: (c4x_override_options): For compatibility

	* config/c4x/c4x.c: (c4x_override_options): For compatibility
	with old target options clear flag_branch_on_count_reg if
	-mno-rptb specified and set flag_argument_alias is -mno-aliases
	specified.
	(c4x_output_cbranch): Handle a sequence of insns rather than a
 	single insn.
	(c4x_rptb_insert): Do not emit a RPTB insn if the RC register
	has not been allocated as the loop counter.
	(c4x_address_conflict): Do not allow two volatile memory references.
	(valid_parallel_operands_4, valid_parallel_operands_5,
 	valid_parallel_operands_6): Reject pattern if the register destination
	of the first set is used as part of an address in the second set.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@23879 138bc75d-0d04-0410-961f-82ee72b054a4