tree-ssa-ccp.c (get_default_value): Use SSA_NAME_VALUE rather than SSA_NAME_EQUIV...

tree-ssa-ccp.c (get_default_value): Use SSA_NAME_VALUE rather than SSA_NAME_EQUIV and SET_SSA_NAME_EQUIV.

	* tree-ssa-ccp.c (get_default_value): Use SSA_NAME_VALUE rather
	than SSA_NAME_EQUIV and SET_SSA_NAME_EQUIV.
	(substitute_and_fold):  Likewise.
	* tree-ssa-dom.c (tree_ssa_dominator_optimize): Remove everything
	except invariants from SSA_NAME_VALUE.
	(thread_across_edge): Use SSA_NAME_VALUE rather than SSA_NAME_EQUIV
	and SET_SSA_NAME_EQUIV.
	(restore_vars_to_original_value, record_const_or_copy): Likewise.
	(record_equivalences_from_phis, record_const_or_copy_1): Likewise.
	(record_equality, cprop_into_successor_phis): Likewise.
	(record_equivalences_from_stmt, cprop_operand): Likewise.
	(lookup_avail_expr): Likewise.
	* tree-ssa-pre.c (fini_pre): Remove everything except invariants
	from SSA_NAME_VALUE.
	* tree.h (SSA_NAME_EQUIV, SET_SSA_NAME_EQUIV): Kill.
	(struct tree_ssa_name):  Kill EQUIV field.  Remove GGC skip
	annotation from the VALUE_HANDLE field.

From-SVN: r87979