re PR c++/48574 (ICE)

Fix PR c++/48574

gcc/cp/

	* class.c (fixed_type_or_null): We cannot determine the dynamic
	type of a reference variable if its initializer is dependent.

gcc/testsuite/

	* g++.dg/template/dependent-expr7.C: New test case.

From-SVN: r172375

gcc/cp/ChangeLog

+2011-04-13  Dodji Seketeli  <dodji@redhat.com>
+
+	PR c++/48574
+	* class.c (fixed_type_or_null): We cannot determine the dynamic
+    	type of a reference variable if its initializer is dependent.
+
 2011-04-13  Jason Merrill  <jason@redhat.com>
 
 	PR c++/48581

gcc/cp/class.c

@@ -5939,6 +5939,7 @@ fixed_type_or_null (tree instance, int *nonnull, int *cdtorp)
 	     itself.  */
 	  if (TREE_CODE (instance) == VAR_DECL
 	      && DECL_INITIAL (instance)
+	      && !type_dependent_expression_p (DECL_INITIAL (instance))
 	      && !htab_find (ht, instance))
 	    {
 	      tree type;

gcc/testsuite/ChangeLog

+2011-04-13  Dodji Seketeli  <dodji@redhat.com>
+
+	PR c++/48574
+	* g++.dg/template/dependent-expr7.C: New test case.
+
 2011-04-13  Jason Merrill  <jason@redhat.com>
 
 	* g++.dg/cpp0x/sfinae13.C: New.

gcc/testsuite/g++.dg/template/dependent-expr7.C

+// Origin PR c++/48574
+// { dg-do compile }
+
+struct A
+{
+  virtual void foo();
+};
+
+template <typename T>
+void
+bar(T x)
+{
+  A &b = *x;
+  b.foo ();
+}
+
+void
+foo()
+{
+  A a;
+  bar(&a);
+}