re PR c++/64080 ([C++14]ICE in cxx_eval_store_expression)

	PR c++/64080
	* constexpr.c (cxx_eval_store_expression): Handle non-decl store
	targets.

From-SVN: r218401

gcc/cp/ChangeLog

+2014-12-03  Jason Merrill  <jason@redhat.com>
+
+	PR c++/64080
+	* constexpr.c (cxx_eval_store_expression): Handle non-decl store
+	targets.
+
 2014-12-03  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/63558

gcc/cp/constexpr.c

@@ -2583,19 +2583,22 @@ cxx_eval_store_expression (const constexpr_ctx *ctx, tree t,
 
 	default:
 	  object = probe;
-	  gcc_assert (DECL_P (object));
 	}
     }
 
   /* And then find/build up our initializer for the path to the subobject
      we're initializing.  */
-  tree *valp = ctx->values->get (object);
+  tree *valp;
+  if (DECL_P (object))
+    valp = ctx->values->get (object);
+  else
+    valp = NULL;
   if (!valp)
     {
       /* A constant-expression cannot modify objects from outside the
 	 constant-expression.  */
       if (!ctx->quiet)
-	error ("modification of %qD is not a constant-expression", object);
+	error ("modification of %qE is not a constant-expression", object);
       *non_constant_p = true;
       return t;
     }

gcc/testsuite/g++.dg/cpp1y/constexpr-ref1.C

+// PR c++/64080
+// { dg-do compile { target c++14 } }
+
+constexpr void foo (int&& i) { i = 0; }
+
+void bar(int&& i)
+{
+  bool b = noexcept(foo(static_cast<int&&>(i)));
+}