[Patchv3] Control SRA and IPA-SRA by a param rather than MOVE_RATIO

[Patchv3] Control SRA and IPA-SRA by a param rather than MOVE_RATIO

gcc/

	* params.def (sra-max-scalarization-size-Ospeed): New.
	(sra-max-scalarization-size-Osize): Likewise.
	* doc/invoke.texi (sra-max-scalarization-size-Ospeed): Document.
	(sra-max-scalarization-size-Osize): Likewise.
	* toplev.c (process_options): Set default values for new
	parameters.
	* tree-sra.c (analyze_all_variable_accesses): Use new parameters.
	* targhooks.c (get_move_ratio): Remove static designator.
	* target.h (get_move_ratio): Declare.

From-SVN: r217191