* expmed.c (emit_store_flag_1): New function.
	(emit_store_flag): Call it.  If we can't find a suitable scc insn,
	try a cstore insn.
	* expr.c (do_store_flag): If we can't find a scc insn, try cstore.
	Use do_compare_rtx_and_jump.
	* arm.h (BRANCH_COST): Increase to 2 on Thumb.
	* arm.md (cstoresi4): New define_expand.
	(cstoresi_eq0_thumb, cstoresi_ne0_thumb): Likewise.
	(cstoresi_eq0_thumb_insn, cstore_ne0_thumb_insn): New patterns.
	(cstoresi_nltu_thumb, thumb_addsi3_addgeu): New patterns.

From-SVN: r118829