2012-07-16 Dehao Chen <dehao@google.com>

	Revert
	2012-07-10  Dehao Chen  <dehao@google.com>

	* tree.h (phi_arg_d): New field.
	* tree-flow-inline.h (gimple_phi_arg_block): New function.
	(gimple_phi_arg_block_from_edge): New function.
	(gimple_phi_arg_set_block): New function.
	(gimple_phi_arg_has_block): New function.
	(redirect_edge_var_map_block): New function.
	* tree-flow.h (_edge_var_map): New field.
	* tree-ssa-live.c (remove_unused_locals): Mark phi_arg's block as used.
	* tree-eh.c (cleanup_empty_eh_merge_phis): Add block debug info for
	redirect_edge_var_map_add.
	* tree-outof-ssa.c (_elim_graph): New field.
	(insert_partition_copy_on_edge): New parameter.
	(insert_value_copy_on_edge): New parameter.
	(insert_rtx_to_part_on_edge): New parameter.
	(insert_part_to_rtx_on_edge): New parameter.
	(elim_graph_add_edge): New parameter.
	(elim_graph_remove_succ_edge): New parameter.
	(FOR_EACH_ELIM_GRAPH_SUCC): New parameter.
	(FOR_EACH_ELIM_GRAPH_PRED): New parameter.
	(new_elim_graph): Add block debug info.
	(clear_elim_graph): Likewise.
	(delete_elim_graph): Likewise.
	(elim_graph_add_node): Likewise.
	(elim_graph_add_edge): Likewise.
	(elim_graph_remove_succ_edge): Likewise.
	(eliminate_build): Likewise.
	(elim_forward): Likewise.
	(elim_unvisited_predecessor): Likewise.
	(elim_backward): Likewise.
	(elim_create): Likewise.
	(eliminate_phi): Likewise.
	(insert_backedge_copies): Likewise.
	* tree-into-ssa.c (insert_phi_nodes_for): Add block debug info for
	add_phi_arg.
	(rewrite_add_phi_arguments): Likewise.
	* tree-ssa-loop-im.c (execute_sm_if_changed): Likewise.
	* tree-ssa-tail-merge.c (replace_block_by): Likewise.
	* tree-ssa-threadupdate.c (copy_phi_args): Likewise.
	* tree-loop-distribution.c (update_phis_for_loop_copy): Likewise.
	* tree-ssa-loop-manip.c (create_iv): Likewise.
	(add_exit_phis_edge): Likewise.
	(split_loop_exit_edge): Likewise.
	(copy_phi_node_args): Likewise.
	(tree_transform_and_unroll_loop): Likewise.
	* value-prof.c (gimple_ic): Likewise.
	(gimple_stringop_fixed_value): Likewise.
	* tree-tailcall.c (add_successor_phi_arg): Likewise.
	(eliminate_tail_call): Likewise.
	(create_tailcall_accumulator): Likewise.
	(tree_optimize_tail_calls_1): Likewise.
	* tree-phinodes.c (add_phi_arg): Likewise.
	(make_phi_node): Likewise.
	(resize_phi_node): Likewise.
	(remove_phi_arg_num): Likewise.
	* omp-low.c (expand_parallel_call): Likewise.
	(expand_omp_for_static_chunk): Likewise.
	* tree-vect-loop-manip.c (slpeel_update_phis_for_duplicate_loop):
	Likewise.
	(slpeel_update_phi_nodes_for_guard1): Likewise.
	(slpeel_update_phi_nodes_for_guard2): Likewise.
	(slpeel_tree_duplicate_loop_to_edge_cfg): Likewise.
	(set_prologue_iterations): Likewise.
	(slpeel_tree_peel_loop_to_edge): Likewise.
	(vect_loop_versioning): Likewise.
	* tree-parloops.c (create_phi_for_local_result): Likewise.
	(transform_to_exit_first_loop): Likewise.
	(create_parallel_loop): Likewise.
	* ipa-split.c (split_function): Likewise.
	* tree-vect-loop.c (get_initial_def_for_induction): Likewise.
	(vect_create_epilog_for_reduction): Likewise.
	* tree-vect-data-refs.c (vect_setup_realignment): Likewise.
	* graphite-scop-detection.c (canonicalize_loop_closed_ssa): Likewise.
	* tree-ssa-phiopt.c (cond_store_replacement): Likewise.
	(cond_if_else_store_replacement_1): Likewise.
	* tree-cfgcleanup.c (remove_forwarder_block): Likewise.
	(remove_forwarder_block_with_phi): Likewise.
	* tree-ssa-pre.c (insert_into_preds_of_block): Likewise.
	* tree-predcom.c (initialize_root_vars): Likewise.
	(initialize_root_vars_lm): Likewise.
	* sese.c (sese_add_exit_phis_edge): Likewise.
	* tree-ssa-dce.c (forward_edge_to_pdom): Likewise.
	* tree-ssa.c (flush_pending_stmts): Likewise.
	(redirect_edge_var_map_add): Likewise.
	(ssa_redirect_edge): Likewise.
	* gimple-streamer-in.c (input_phi): Likewise.
	* tree-vect-stmts.c (vectorizable_load): Likewise.
	* tree-inline.c (copy_phis_for_bb): Likewise.
	* tree-ssa-phiprop.c (phiprop_insert_phi): Likewise.
	* tree-switch-conversion.c (fix_phi_nodes): Likewise.
	* tree-cfg.c (reinstall_phi_args): Likewise.
	(gimple_make_forwarder_block): Likewise.
	(add_phi_args_after_copy_edge): Likewise.
	(gimple_duplicate_sese_tail): Likewise.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189518 138bc75d-0d04-0410-961f-82ee72b054a4

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