Revert:

	2007-09-04  Jan Hubicka  <jh@suse.cz>
	* tree-tailcall.c (eliminate_tail_call): Expect unrenamed return value.

	2007-09-04  Richard Guenther  <rguenther@suse.de>
	* tree-ssa-operands.c (add_virtual_operand): Only mark
	stores as has_volatile_ops if alias information is not available.

From-SVN: r128109

gcc/ChangeLog

+2007-09-05  Jan Hubicka  <jh@suse.cz>
+
+	Revert:
+
+	2007-09-04  Jan Hubicka  <jh@suse.cz>
+	* tree-tailcall.c (eliminate_tail_call): Expect unrenamed return value.
+
+	2007-09-04  Richard Guenther  <rguenther@suse.de>
+	* tree-ssa-operands.c (add_virtual_operand): Only mark
+	stores as has_volatile_ops if alias information is not available.
+
 2007-09-05  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/rs6000/tramp.asm: Include config.h.

gcc/tree-ssa-operands.c

@@ -1494,8 +1494,7 @@ add_virtual_operand (tree var, stmt_ann_t s_ann, int flags,
 
   if (aliases == NULL)
     {
-      if (!gimple_aliases_computed_p (cfun)
-	  && (flags & opf_def))
+      if (!gimple_aliases_computed_p (cfun))
         s_ann->has_volatile_ops = true;
 
       /* The variable is not aliased or it is an alias tag.  */

gcc/tree-tailcall.c

@@ -800,7 +800,6 @@ eliminate_tail_call (struct tailcall *t)
 
       /* Result of the call will no longer be defined.  So adjust the
 	 SSA_NAME_DEF_STMT accordingly.  */
-      if (TREE_CODE (rslt) == SSA_NAME)
       SSA_NAME_DEF_STMT (rslt) = build_empty_stmt ();
     }