re PR c++/78765 (ICE on invalid C++ code on x86_64-linux-gnu (internal compiler…

re PR c++/78765 (ICE on invalid C++ code on x86_64-linux-gnu (internal compiler error: in cp_build_addr_expr_1, at cp/typeck.c:5708))

	cp/
	PR c++/78765
	* pt.c (convert_nontype_argument): Don't try and see if integral
	or enum expressions are constants prematurely.

	testsuite/
	PR c++/78765
	* g++.dg/cpp0x/pr78765.C: New.

From-SVN: r244101

gcc/cp/ChangeLog

+2017-01-05  Nathan Sidwell  <nathan@acm.org>
+
+	PR c++/78765
+	* pt.c (convert_nontype_argument): Don't try and see if integral
+	or enum expressions are constants prematurely.
+
 2017-01-04  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/64767

gcc/cp/pt.c

@@ -6386,7 +6386,7 @@ convert_nontype_argument (tree type, tree expr, tsubst_flags_t complain)
 	   to leave it in that form rather than lower it to a
 	   CONSTRUCTOR.  */;
       else if (INTEGRAL_OR_ENUMERATION_TYPE_P (type))
-	expr = maybe_constant_value (expr);
+	/* Constant value checking is done later with type conversion.  */;
       else if (cxx_dialect >= cxx1z)
 	{
 	  if (TREE_CODE (type) != REFERENCE_TYPE)

gcc/testsuite/ChangeLog

+2017-01-05  Nathan Sidwell  <nathan@acm.org>
+
+	PR c++/78765
+	* g++.dg/cpp0x/pr78765.C: New.
+
 2017-01-05  Dominik Vogt  <vogt@linux.vnet.ibm.com>
 
 	* gcc.target/s390/memcpy-2.c: New test.

gcc/testsuite/g++.dg/cpp0x/pr78765.C

+// PR c++/78765
+// { dg-do compile { target c++11 } }
+
+// ICE with failed constexpr object and member fn call
+
+struct ValueType {
+  constexpr operator int() const {return field;}
+  int field;
+};
+
+static constexpr ValueType var = 0; // { dg-error "conversion" }
+
+template <int> class ValueTypeInfo;
+
+ValueTypeInfo<var> x;