[patch] Vectorizer: resolve mix of pointer and object

[Ira Rosen <IRAR at il dot ibm dot com>]

Richard Henderson pointed out a type-mixture issue in the vectorizer (
http://gcc.gnu.org/ml/gcc-patches/2004-12/msg01862.html). Discussing with
Dorit, we realized that this problem can be repaired as follows.

In function vect_get_base_and_offset pointer and non-pointer types are now
treated separately.
Also initial base is now always an address.

Bootstrapped and tested on ppc-darwin.

O.K. for mainline?

Thanks,
Ira

Changelog entry:

2005-01-13  Ira Rosen  <irar@il.ibm.com>

        * tree-vectorizer.h (struct _stmt_vec_info): Rename a field: base
        to base_address.
        * tree-vectorizer.c (new_stmt_vec_info): Rename the above field of
        stmt_vec_info.
        (vect_get_base_and_offset): Reorganize.
        (vect_create_addr_base_for_vector_ref): Remove treatment for
different
        data reference types.
        (vect_compute_data_ref_alignment): Rename base to base_address in
        stmt_vec_info. Get the object in order to force its alignment.
        (vect_get_memtag_and_dr): Rename base to base_address in
stmt_vec_info.
        Convert it into object for memtag analysis.

Patch:
(See attached file: diff.jan13)

Attachment: diff.jan13
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