re PR c++/84325 (internal compiler error, in cxx_eval_constant_expression gcc/cp/constexpr.c:4740)

	PR c++/84325
	* tree.c (replace_placeholders_r): Only check TREE_CONSTANT on
	non-types.

	* g++.dg/cpp1z/pr84325.C: New test.

From-SVN: r258008

gcc/cp/ChangeLog

+2018-02-26  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/84325
+	* tree.c (replace_placeholders_r): Only check TREE_CONSTANT on
+	non-types.
+
 2018-02-26  Jason Merrill  <jason@redhat.com>
 
 	PR c++/84447 - ICE with deleted inherited ctor with default arg.

gcc/cp/tree.c

@@ -3091,7 +3091,7 @@ replace_placeholders_r (tree* t, int* walk_subtrees, void* data_)
   replace_placeholders_t *d = static_cast<replace_placeholders_t*>(data_);
   tree obj = d->obj;
 
-  if (TREE_CONSTANT (*t))
+  if (TYPE_P (*t) || TREE_CONSTANT (*t))
     {
       *walk_subtrees = false;
       return NULL_TREE;

gcc/testsuite/ChangeLog

+2018-02-26  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/84325
+	* g++.dg/cpp1z/pr84325.C: New test.
+
 2018-02-26  Carl Love  <cel@us.ibm.com>
 
 	* gcc.target/powerpc/builtins-3.c: Move vec_neg builtin tests to

gcc/testsuite/g++.dg/cpp1z/pr84325.C

+// PR c++/84325
+// { dg-do compile }
+// { dg-options "-std=c++17" }
+
+struct seconds { int i_{0}; constexpr seconds (int) {} };
+template <char... _Digits> constexpr seconds operator""_s() {
+  return seconds(0);
+}
+constexpr seconds operator""_s(long double i) {
+  return seconds(0);
+}
+template<class TYPE>
+struct Param {
+  constexpr static inline seconds time_to_wait{10_s};
+};
+struct Empty {};
+Param<Empty> p;