re PR c++/46335 ([C++0X] [4.6 Regression] ICE: in gimple_add_tmp_var, at gimplify.c:701)

	PR c++/46335
	* tree.c (bot_manip): Check TREE_SIDE_EFFECTS as well.

From-SVN: r166470

gcc/cp/ChangeLog

 2010-11-08  Jason Merrill  <jason@redhat.com>
 
+	PR c++/46335
+	* tree.c (bot_manip): Check TREE_SIDE_EFFECTS as well.
+
 	Correct conversion/overflow behavior.
 	* cvt.c (ignore_overflows): Move here from typeck.c.
 	(ocp_convert): Use it.

gcc/cp/tree.c

@@ -1763,11 +1763,10 @@ bot_manip (tree* tp, int* walk_subtrees, void* data)
   splay_tree target_remap = ((splay_tree) data);
   tree t = *tp;
 
-  if (!TYPE_P (t) && TREE_CONSTANT (t))
+  if (!TYPE_P (t) && TREE_CONSTANT (t) && !TREE_SIDE_EFFECTS (t))
     {
       /* There can't be any TARGET_EXPRs or their slot variables below
-	 this point.  We used to check !TREE_SIDE_EFFECTS, but then we
-	 failed to copy an ADDR_EXPR of the slot VAR_DECL.  */
+	 this point.  */
       *walk_subtrees = 0;
       return NULL_TREE;
     }

gcc/testsuite/ChangeLog

+2010-11-08  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/cpp0x/constexpr-defarg.C: New.
+
 2010-11-08  Xinliang David Li  <davidxl@google.com>
 
 	PR/46316

gcc/testsuite/g++.dg/cpp0x/constexpr-defarg.C

+// PR c++/46335
+// { dg-options -std=c++0x }
+
+struct T { };
+struct A {
+    A(const T &tr =T()) {}
+};
+struct B {
+    A k;
+};
+B kk_;
+A fk_;