re PR target/47822 (Multiple test suite failures due to revision 170321)

2011-02-20  Richard Guenther  <rguenther@suse.de>

	PR lto/47822
	* tree.c (free_lang_data_in_decl): Clean builtins from
	the TU decl BLOCK_VARS.

From-SVN: r170339

gcc/ChangeLog

+2011-02-20  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/47822
+	* tree.c (free_lang_data_in_decl): Clean builtins from
+	the TU decl BLOCK_VARS.
+ 
 2011-02-19  Alexandre Oliva  <aoliva@redhat.com>
 
 	PR debug/47620

gcc/tree.c

@@ -4577,6 +4577,25 @@ free_lang_data_in_decl (tree decl)
     }
   else if (TREE_CODE (decl) == TYPE_DECL)
     DECL_INITIAL (decl) = NULL_TREE;
+  else if (TREE_CODE (decl) == TRANSLATION_UNIT_DECL
+           && DECL_INITIAL (decl)
+           && TREE_CODE (DECL_INITIAL (decl)) == BLOCK)
+    {
+      /* Strip builtins from the translation-unit BLOCK.  We still have
+	 targets without builtin_decl support and also builtins are
+	 shared nodes and thus we can't use TREE_CHAIN in multiple
+	 lists.  */
+      tree *nextp = &BLOCK_VARS (DECL_INITIAL (decl));
+      while (*nextp)
+        {
+          tree var = *nextp;
+          if (TREE_CODE (var) == FUNCTION_DECL
+              && DECL_BUILT_IN (var))
+	    *nextp = TREE_CHAIN (var);
+	  else
+	    nextp = &TREE_CHAIN (var);
+        }
+    }
 }