* sv.po: Update.

[pf3gnuchains/gcc-fork.git] / gcc / tree-predcom.c

diff --git a/gcc/tree-predcom.c b/gcc/tree-predcom.c
index c55c89e..bef5252 100644 (file)
--- a/gcc/tree-predcom.c
+++ b/gcc/tree-predcom.c
@@ -1,5 +1,5 @@
 /* Predictive commoning.
-   Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
+   Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011, 2012
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -1306,8 +1306,20 @@ replace_ref_with (gimple stmt, tree new_tree, bool set, bool in_lhs)
       val = gimple_assign_lhs (stmt);
       if (TREE_CODE (val) != SSA_NAME)
        {
-         gcc_assert (gimple_assign_copy_p (stmt));
          val = gimple_assign_rhs1 (stmt);
+         gcc_assert (gimple_assign_single_p (stmt));
+         if (TREE_CLOBBER_P (val))
+           {
+             val = gimple_default_def (cfun, SSA_NAME_VAR (new_tree));
+             if (val == NULL_TREE)
+               {
+                 val = make_ssa_name (SSA_NAME_VAR (new_tree),
+                                      gimple_build_nop ());
+                 set_default_def (SSA_NAME_VAR (new_tree), val);
+               }
+           }
+         else
+           gcc_assert (gimple_assign_copy_p (stmt));
        }
     }
   else
@@ -2464,8 +2476,17 @@ tree_predictive_commoning_loop (struct loop *loop)
   datarefs = VEC_alloc (data_reference_p, heap, 10);
   dependences = VEC_alloc (ddr_p, heap, 10);
   loop_nest = VEC_alloc (loop_p, heap, 3);
-  compute_data_dependences_for_loop (loop, true, &loop_nest, &datarefs,
-                                    &dependences);
+  if (! compute_data_dependences_for_loop (loop, true, &loop_nest, &datarefs,
+                                          &dependences))
+    {
+      if (dump_file && (dump_flags & TDF_DETAILS))
+       fprintf (dump_file, "Cannot analyze data dependencies\n");
+      VEC_free (loop_p, heap, loop_nest);
+      free_data_refs (datarefs);
+      free_dependence_relations (dependences);
+      return false;
+    }
+
   if (dump_file && (dump_flags & TDF_DETAILS))
     dump_data_dependence_relations (dump_file, dependences);