gimple-ssa-store-merging.c (count_multiple_uses): New function.

gimple-ssa-store-merging.c (count_multiple_uses): New function.

	* gimple-ssa-store-merging.c (count_multiple_uses): New function.
	(split_group): Add total_orig and total_new arguments, estimate the
	number of statements related to the store group without store merging
	and with store merging.
	(imm_store_chain_info::output_merged_store): Adjust split_group
	callers, punt if estimated number of statements with store merging
	is not smaller than estimated number of statements without it.
	Formatting fix.
	(handled_load): Remove has_single_use checks.
	(pass_store_merging::process_store): Likewise.

From-SVN: r254579