tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Copy alias info.

2010-07-05  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Copy
	alias info.

From-SVN: r161841

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f4ad9076a1ba0e7ab71ae3f88b1d53f1dce6a867..737c89f38dfa7d04ba61030ac196af7e68bfe9a0 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2010-07-05  Richard Guenther  <rguenther@suse.de>
+
+       * tree-ssa-loop-ivopts.c (rewrite_use_nonlinear_expr): Copy
+       alias info.
+
 2010-07-05  Richard Guenther  <rguenther@suse.de>
 
        * tree.c (reference_alias_ptr_type): New function.

diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c
index db56b93470b3e7d3feba73bd94d8c83e41be13f6..d9362e58fb0a58c486f0cd9276a3d528d05d2582 100644 (file)
--- a/gcc/tree-ssa-loop-ivopts.c
+++ b/gcc/tree-ssa-loop-ivopts.c
@@ -5486,8 +5486,12 @@ rewrite_use_nonlinear_expr (struct ivopts_data *data,
             to still.  */
          && (get_gimple_rhs_num_ops (TREE_CODE (comp))
              >= gimple_num_ops (gsi_stmt (bsi)))))
-    comp = force_gimple_operand_gsi (&bsi, comp, false, SSA_NAME_VAR (tgt),
-                                    true, GSI_SAME_STMT);
+    {
+      comp = force_gimple_operand_gsi (&bsi, comp, true, NULL_TREE,
+                                      true, GSI_SAME_STMT);
+      if (POINTER_TYPE_P (TREE_TYPE (tgt)))
+       duplicate_ssa_name_ptr_info (comp, SSA_NAME_PTR_INFO (tgt));
+    }
 
   if (gimple_code (use->stmt) == GIMPLE_PHI)
     {