[Patch 2/8] parloops: Allow poly nit and bound

[Andre Vieira (lists) via Gcc-patches]

Teach parloops how to handle a poly nit and bound e ahead of the changes 
to enable non-constant simdlen.

gcc/ChangeLog:
        * tree-parloops.cc (try_to_transform_to_exit_first_loop_alt): Accept
        poly NIT and ALT_BOUND.diff --git a/gcc/tree-parloops.cc b/gcc/tree-parloops.cc
index 
a35f3d5023b06e5ef96eb4222488fcb34dd7bd45..cf713e53d712fb5ad050e274f373adba5a90c5a7
 100644
--- a/gcc/tree-parloops.cc
+++ b/gcc/tree-parloops.cc
@@ -2531,14 +2531,16 @@ try_transform_to_exit_first_loop_alt (class loop *loop,
   tree nit_type = TREE_TYPE (nit);
 
   /* Figure out whether nit + 1 overflows.  */
-  if (TREE_CODE (nit) == INTEGER_CST)
+  if (TREE_CODE (nit) == INTEGER_CST
+      || TREE_CODE (nit) == POLY_INT_CST)
     {
       if (!tree_int_cst_equal (nit, TYPE_MAX_VALUE (nit_type)))
        {
          alt_bound = fold_build2_loc (UNKNOWN_LOCATION, PLUS_EXPR, nit_type,
                                       nit, build_one_cst (nit_type));
 
-         gcc_assert (TREE_CODE (alt_bound) == INTEGER_CST);
+         gcc_assert (TREE_CODE (alt_bound) == INTEGER_CST
+                     || TREE_CODE (alt_bound) == POLY_INT_CST);
          transform_to_exit_first_loop_alt (loop, reduction_list, alt_bound);
          return true;
        }