tree-ssa-live.c (var_map_base_init): Handle SSA names with DECL_IGNORED_P base VAR_DECLs like anonymous SSA names.

2013-09-26  Richard Biener  <rguenther@suse.de>

	* tree-ssa-live.c (var_map_base_init): Handle SSA names with
	DECL_IGNORED_P base VAR_DECLs like anonymous SSA names.
	(loe_visit_block): Use gcc_checking_assert.
	* tree-ssa-coalesce.c (create_outofssa_var_map): Use
	gimple_assign_ssa_name_copy_p.
	(gimple_can_coalesce_p): Adjust according to the var_map_base_init
	change.

	* gcc.dg/tree-ssa/coalesce-2.c: New testcase.

From-SVN: r202944