re PR tree-optimization/22228 (ICE with -ftree-vectorize in verify_ssa)

re PR tree-optimization/22228 (ICE with -ftree-vectorize in verify_ssa)

        PR tree-optimization/22228
        * tree-ssa-loop (pass_vectorize): Add TODO_verify_loops to todo_flags_start.
        * tree-vect-transform.c (vect_transform_loop): Mark the variables that
        are recorded in vect_vnames_to_rename for renaming.
        * tree-vectorizer.c (vect_vnames_to_rename): New global bitmap.
        (slpeel_update_phi_nodes_for_guard1): Record virtual vars for renaming
        in vect_vnames_to_rename.
        (vectorize_loops): Allocate and free the vect_vnames_to_rename bitmap.
        * tree-vectorizer.h (vect_vnames_to_rename): New extern variable.

From-SVN: r103252