re PR c++/52672 (internal compiler error: in cxx_eval_indirect_ref, at cp/semantics.c:6766)

	PR c++/52672
	* gcc/cp/semantics.c (cxx_fold_indirect_ref): Don't attempt to fold
	stripped child trees that are not pointer types.

From-SVN: r185890

gcc/cp/ChangeLog

+2012-03-27  Meador Inge  <meadori@codesourcery.com>
+
+	PR c++/52672
+	* semantics.c (cxx_fold_indirect_ref): Don't attempt to fold
+	stripped child trees that are not pointer types.
+
 2012-03-21  Jason Merrill  <jason@redhat.com>
 
 	Implement return type deduction for normal functions with -std=c++1y.

gcc/cp/semantics.c

@@ -7202,7 +7202,8 @@ cxx_fold_indirect_ref (location_t loc, tree type, tree op0, bool *empty_base)
   sub = op0;
   STRIP_NOPS (sub);
   subtype = TREE_TYPE (sub);
-  gcc_assert (POINTER_TYPE_P (subtype));
+  if (!POINTER_TYPE_P (subtype))
+    return NULL_TREE;
 
   if (TREE_CODE (sub) == ADDR_EXPR)
     {

gcc/testsuite/ChangeLog

+2012-03-27  Meador Inge  <meadori@codesourcery.com>
+
+	PR c++/52672
+	* g++.dg/cpp0x/constexpr-52672.C: New testcase.
+
 2012-03-27  Mike Stump  <mikestump@comcast.net>
 
 	PR target/52665

gcc/testsuite/g++.dg/cpp0x/constexpr-52672.C

+// PR c++/52672
+// { dg-do compile }
+// { dg-options "-std=c++11" }
+
+typedef unsigned long * ul_ptr;
+constexpr unsigned long a = *((ul_ptr)0x0); // { dg-error "" }
+constexpr unsigned long b = *((ul_ptr)(*((ul_ptr)0x0))); // { dg-error "" }
+constexpr unsigned long c = *((ul_ptr)*((ul_ptr)(*((ul_ptr)0x0)))); // { dg-error "" }