2012-03-12  Andrew Pinski  <apinski@cavium.com>

	* tree-ssa-phiopt.c (single_non_singleton_phi_for_edges): New function.
	(tree_ssa_phiopt_worker): Use single_non_singleton_phi_for_edges.
	(value_replacement): Likewise.
	(empty_block_p): Check also if the PHIs for the block are empty.

2012-03-12  Andrew Pinski  <apinski@cavium.com>

	* gcc.dg/tree-ssa/phi-opt-7.c: New testcase.

From-SVN: r185254