diff -Naurp gcc-orig/tree-vectorizer.c gcc/tree-vectorizer.c
--- gcc-orig/tree-vectorizer.c	2007-03-11 22:40:09.000000000 -0600
+++ gcc/tree-vectorizer.c	2007-07-25 09:27:06.000000000 -0600
@@ -1536,7 +1536,7 @@ vect_can_force_dr_alignment_p (tree decl
        PREFERRED_STACK_BOUNDARY is honored by all translation units.
        However, until someone implements forced stack alignment, SSE
        isn't really usable without this.  */  
-    return (alignment <= PREFERRED_STACK_BOUNDARY); 
+    return (alignment <= STACK_BOUNDARY); 
 }