* gcc.dg/tree-ssa/fre-vce-1.c: Cleanup "fre" tree dump.

[pf3gnuchains/gcc-fork.git] / gcc / tree-loop-linear.c

diff --git a/gcc/tree-loop-linear.c b/gcc/tree-loop-linear.c
index 7e5f298..cc2440d 100644 (file)
--- a/gcc/tree-loop-linear.c
+++ b/gcc/tree-loop-linear.c
@@ -1,5 +1,6 @@
 /* Linear Loop transforms
-   Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009
+   Free Software Foundation, Inc.
    Contributed by Daniel Berlin <dberlin@dberlin.org>.
 
 This file is part of GCC.
@@ -333,12 +334,18 @@ linear_transform_loops (void)
       lambda_loopnest before, after;
       lambda_trans_matrix trans;
       struct obstack lambda_obstack;
-      gcc_obstack_init (&lambda_obstack);
+      struct loop *loop;
+      VEC(loop_p,heap) *nest;
 
       depth = perfect_loop_nest_depth (loop_nest);
       if (depth == 0)
        continue;
 
+      nest = VEC_alloc (loop_p, heap, 3);
+      for (loop = loop_nest; loop; loop = loop->inner)
+       VEC_safe_push (loop_p, heap, nest, loop);
+
+      gcc_obstack_init (&lambda_obstack);
       VEC_truncate (tree, oldivs, 0);
       VEC_truncate (tree, invariants, 0);
       VEC_truncate (tree, lambda_parameters, 0);
@@ -347,12 +354,11 @@ linear_transform_loops (void)
       dependence_relations = VEC_alloc (ddr_p, heap, 10 * 10);
       if (!compute_data_dependences_for_loop (loop_nest, true, &datarefs,
                                              &dependence_relations))
-       continue;
+       goto free_and_continue;
       
       lambda_collect_parameters (datarefs, &lambda_parameters);
-      if (!lambda_compute_access_matrices (datarefs, lambda_parameters,
-                                          loop_nest->num))
-       continue;
+      if (!lambda_compute_access_matrices (datarefs, lambda_parameters, nest))
+       goto free_and_continue;
 
       if (dump_file && (dump_flags & TDF_DETAILS))
        dump_ddrs (dump_file, dependence_relations);
@@ -410,6 +416,7 @@ linear_transform_loops (void)
       obstack_free (&lambda_obstack, NULL);
       free_dependence_relations (dependence_relations);
       free_data_refs (datarefs);
+      VEC_free (loop_p, heap, nest);
     }
 
   for (i = 0; VEC_iterate (gimple, remove_ivs, i, oldiv_stmt); i++)