Refactoring sese.h and graphite-poly.h

Rename scop->region to scop->scop_info
Removed conversion constructors for sese_l and dr_info.
Removed macros.

No functional changed intended. Passes regtest and bootstrap.

gcc/ChangeLog:

2015-19-10  Aditya Kumar  <aditya.k7@samsung.com>
        * graphite-poly.h (struct dr_info): Removed conversion constructor.
        (struct scop): Renamed scop::region to scop::scop_info
        (scop_set_region): Same.
        (SCOP_REGION): Removed
        (SCOP_CONTEXT): Removed.
        (POLY_SCOP_P): Removed.
        * graphite-isl-ast-to-gimple.c (translate_isl_ast_node_user):
        Rename scop->region to scop->scop_info.
        (add_parameters_to_ivs_params): Same.
        (graphite_regenerate_ast_isl): Same.
        * graphite-poly.c (new_scop): Same.
        (free_scop): Same.
        (print_scop_params): Same.
        * graphite-scop-detection.c (scop_detection::remove_subscops): Same.
        (scop_detection::remove_intersecting_scops): Use pointer to sese_l.
        (dot_all_scops_1): Rename scop->region to scop->scop_info.
        (scop_detection::nb_pbbs_in_loops): Same.
        (find_scop_parameters): Same.
        (try_generate_gimple_bb): Same.
        (gather_bbs::before_dom_children): Same.
        (gather_bbs::after_dom_children): Same.
        (build_scops): Same.
        * graphite-sese-to-poly.c (build_scop_scattering): Same.
        (extract_affine_chrec): Same.
        (extract_affine): Same.
        (set_scop_parameter_dim): Same.
        (build_loop_iteration_domains): Same.
        (create_pw_aff_from_tree): Same.
        (add_param_constraints): Same.
        (build_scop_iteration_domain): Same.
        (build_scop_drs): Same.
        (analyze_drs_in_stmts): Same.
        (insert_out_of_ssa_copy_on_edge): Same.
        (rewrite_close_phi_out_of_ssa):Same.
        (rewrite_reductions_out_of_ssa):Same.
        (handle_scalar_deps_crossing_scop_limits):Same.
        (rewrite_cross_bb_scalar_deps):Same.
        (rewrite_cross_bb_scalar_deps_out_of_ssa):Same.
        (build_poly_scop):Same.
        (build_alias_set): Use pointer to dr_info.
        * graphite.c (print_graphite_scop_statistics):
        (graphite_transform_loops):
        * sese.h (struct sese_l): Remove conversion constructor.

From-SVN: r229135