* tree.h (enum tree_index): Add TI_INTEGER_THREE.

	(integer_three_node): Add.
	* tree.c (build_common_tree_nodes_2): Use integer_type_node insead of
	NULL_TREE in build_int_cst calls. Initialize the integer_three_node.
	* builtins.c (expand_builtin_prefetch): Use common tree nodes instead
	of call build_int_cst.
	* tree-ssa-sccvn.c (copy_reference_ops_from_ref): Ditto.
	* tree-ssa-loop-ivopts.c (idx_find_step): Ditto.
	(find_interesting_uses_address): Ditto.
	* tree-ssa-alias.c (ao_ref_init_from_ptr_and_size): Ditto.
	* tree-eh.c (lower_eh_constructs_2): Ditto.
	* tree-vect-loop.c (get_initial_def_for_induction): Ditto.
	* c-typeck.c (really_start_incremental_init, push_init_level): Ditto.
	* expmed.c (expand_divmod): Ditto.
	* tree-mudflap.c (mx_register_decls): Ditto.
	* varasm.c (array_size_for_constructor): Ditto.
	* tree-ssa-loop-prefetch.c (issue_prefetch_ref): Ditto.
	* c-parser.c (c_parser_postfix_expression): Ditto.
	
/cp
	* decl.c (integer_three_node): Remove.
	(cxx_init_decl_processing): Do not initialize the integer_three_node.
	* cp-tree.h (integer_three_node): Remove.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@162230 138bc75d-0d04-0410-961f-82ee72b054a4

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