tree-ssa-tail-merge.c (stmt_local_def): New function, factored out of same_succ_hash, with local_def inlined.

2012-04-14  Tom de Vries  <tom@codesourcery.com>

	* tree-ssa-tail-merge.c (stmt_local_def): New function, factored out of
	same_succ_hash, with local_def inlined.  Use SINGLE_SSA_DEF_OPERAND.
	Use FOR_EACH_IMM_USE_FAST instead of FOR_EACH_IMM_USE_STMT.  Remove use
	of find_edge.
	(gsi_advance_fw_nondebug_nonlocal): New function.
	(local_def): Removed function.
	(same_succ_hash): Use stmt_local_def.
	(same_succ_equal): Use gsi_advance_fw_nondebug_nonlocal.
	(gsi_advance_bw_nondebug_nonlocal): Use stmt_local_def.

From-SVN: r186447