[Bug rtl-optimization/44479] false dependencies are computed after vectorization

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2010-07-04 16:08 -------
Subject: Bug 44479

Author: rguenth
Date: Sun Jul  4 16:08:21 2010
New Revision: 161802

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161802
Log:
2010-07-04  Richard Guenther  <rguent...@suse.de>

        PR tree-optimization/44479
        * tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Avoid
        extra SSA name copy statements which preserves points-to
        information.
        * tree-vect-data-refs.c (vect_create_addr_base_for_vector_ref):
        Copy points-to information for all pointers.  Properly handle
        MEM_REFs.
        (vect_create_data_ref_ptr): Likewise.  Avoid extra SSA name
        copy statements.
        * Makefile.in (tree-ssa-loop-ivopts.o): Add tree-ssa-propagate.h
        dependency.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/Makefile.in
    trunk/gcc/tree-ssa-loop-ivopts.c
    trunk/gcc/tree-vect-data-refs.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44479