[Bug middle-end/48377] [4.6/4.7 regression] miscompilation at -O3

["irar at il dot ibm.com" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48377

--- Comment #23 from Ira Rosen <irar at il dot ibm.com> 2011-04-07 12:02:46 UTC ---
Well, it's hard to accept such an easy solution when the original patch has
hundreds of rows ;)

So, you think that 

Index: tree-vect-data-refs.c
===================================================================
--- tree-vect-data-refs.c       (revision 172019)
+++ tree-vect-data-refs.c       (working copy)
@@ -1110,12 +1110,9 @@ vector_alignment_reachable_p (struct dat
       if (ba)
        is_packed = contains_packed_reference (ba);

-      if (vect_print_dump_info (REPORT_DETAILS))
-       fprintf (vect_dump, "Unknown misalignment, is_packed = %d",is_packed);
-      if (targetm.vectorize.vector_alignment_reachable (type, is_packed))
-       return true;
-      else
-       return false;
+      if (is_packed
+          || compare_tree_int (TYPE_SIZE (type), TYPE_ALIGN (type)) > 0)
+        return false;
     }

   return true;

is enough, and we can just get rid of vector_alignment_reachable?

Thanks,
Ira