@@ -1143,6 +1143,9 @@ vector_alignment_reachable_p (struct dat
if (ba)
is_packed = contains_packed_reference (ba);
+ if (compare_tree_int (TYPE_SIZE (type), TYPE_ALIGN (type)) > 0)
+ is_packed = true;
+
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))
@@ -0,0 +1,25 @@
+/* PR tree-optimization/48377 */
+/* { dg-do run } */
+
+typedef unsigned int U __attribute__((__aligned__ (1), __may_alias__));
+
+__attribute__((noinline, noclone)) unsigned int
+foo (const char *s, int len)
+{
+ const U *p = (const U *) s;
+ unsigned int f = len / sizeof (unsigned int), hash = len, i;
+
+ for (i = 0; i < f; ++i)
+ hash += *p++;
+ return hash;
+}
+
+char buf[64] __attribute__((aligned (32)));
+
+int
+main (void)
+{
+ return foo (buf + 1, 26) != 26;
+}
+
+/* { dg-final { cleanup-tree-dump "vect" } } */