[Bug middle-end/79649] Memset pattern in named address space crashes compiler or generates wrong code

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79649

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I have:

--- gcc/tree-loop-distribution.c.jj     2017-01-30 09:31:47.000000000 +0100
+++ gcc/tree-loop-distribution.c        2017-02-21 09:31:52.484838050 +0100
@@ -1072,6 +1072,13 @@ classify_partition (loop_p loop, struct
       /* But exactly one store and/or load.  */
       for (j = 0; RDG_DATAREFS (rdg, i).iterate (j, &dr); ++j)
        {
+         tree type = TREE_TYPE (DR_REF (dr));
+
+         /* The memset, memcpy and memmove library calls are only
+            able to deal with generic address space.  */
+         if (!ADDR_SPACE_GENERIC_P (TYPE_ADDR_SPACE (type)))
+           return;
+
          if (DR_IS_READ (dr))
            {
              if (single_load != NULL)