re PR c++/65295 ([C++1y] constexpr function causes ICE if it returns a local…

re PR c++/65295 ([C++1y] constexpr function causes ICE if it returns a local variable bigger than 16 bytes)

	PR c++/65295
	* constexpr.c (cxx_eval_constant_expression): Remove assert in
	RESULT_DECL handling.

From-SVN: r221161

gcc/cp/ChangeLog

+2015-03-03  Aldy Hernandez  <aldyh@redhat.com>
+
+	PR c++/65295
+	* constexpr.c (cxx_eval_constant_expression): Remove assert in
+	RESULT_DECL handling.
+
 2015-02-26  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/65202

gcc/cp/constexpr.c

@@ -2955,8 +2955,8 @@ cxx_eval_constant_expression (const constexpr_ctx *ctx, tree t,
       if (lval)
 	return t;
       /* We ask for an rvalue for the RESULT_DECL when indirecting
-	 through an invisible reference.  */
-      gcc_assert (DECL_BY_REFERENCE (t));
+	 through an invisible reference, or in named return value
+	 optimization.  */
       return (*ctx->values->get (t));
 
     case VAR_DECL:

gcc/testsuite/g++.dg/pr65295.C

+// { dg-do compile }
+// { dg-options "-std=c++1y" }
+
+struct arr {
+    constexpr arr() : elem() { }
+    char elem[17];
+};
+
+constexpr 
+arr f()
+{
+    arr result;
+    return result;
+}
+
+constexpr arr a { f() };
+
+int main()
+{
+}