re PR middle-end/26084 (ICE (segfault) on C++ OpenMP code)

        PR middle-end/26084
        * except.c (duplicate_eh_regions_0): New.
        (duplicate_eh_region_1): Duplicate the children of the node as
        well as the node itself.  Link them up properly.
        (duplicate_eh_region_2): Merge into ...
        (duplicate_eh_regions): ... here.  Take copy_region argument, and
        copy only a sub-tree if asked.  Simplify copying and fixup.
        (eh_region_outer_p): New.
        * except.h (duplicate_eh_regions): Update decl.
        (eh_region_outer_p): Declare.
        * omp-low.c (lower_omp_single): Fix eh region placement wrt OMP_RETURN.
        (lower_omp_master): Likewise.
        (lower_omp_ordered): Likewise.
        * tree-cfg.c (struct move_stmt_d): Add new_label_map.
        (move_stmt_r): Use it to remap labels.  Handle recursion vs
        remap_decls_p properly.
        (move_block_to_fn): Pass in new_label_map.  Remap RESX_EXPR.
        (find_outermost_region_in_block): New.
        (new_label_mapper): New.
        (move_sese_region_to_fn): Copy eh information to the new function
        properly.
        * tree-inline.c (copy_cfg_body): Update for new duplicate_eh_regions
        argument.
        * tree-pretty-print.c (dump_generic_node): Dump RESX_EXPR region
        number.

From-SVN: r112283