re PR c++/78283 (-Wc++1z-compat warning is sticky)

	PR c++/78283
	* mangle.c (start_mangling): Reset G.need_cxx1z_warning.

	* g++.dg/cpp1z/noexcept-type13.C: New test.

From-SVN: r242026

gcc/cp/ChangeLog

+2016-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/78283
+	* mangle.c (start_mangling): Reset G.need_cxx1z_warning.
+
 2016-11-09  Jason Merrill  <jason@redhat.com>
 
 	* parser.c (cp_parser_simple_type_specifier): Allow placeholder

gcc/cp/mangle.c

@@ -3649,6 +3649,7 @@ start_mangling (const tree entity)
 {
   G.entity = entity;
   G.need_abi_warning = false;
+  G.need_cxx1z_warning = false;
   obstack_free (&name_obstack, name_base);
   mangle_obstack = &name_obstack;
   name_base = obstack_alloc (&name_obstack, 0);

gcc/testsuite/ChangeLog

+2016-11-09  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/78283
+	* g++.dg/cpp1z/noexcept-type13.C: New test.
+
 2016-11-09  Toma Tabacu  <toma.tabacu@imgtec.com>
 
 	* gcc.target/mips/mips.exp (mips-dg-options): Upgrade to MIPS IV if

gcc/testsuite/g++.dg/cpp1z/noexcept-type13.C

+// PR c++/78283
+// { dg-do compile }
+// { dg-options "-Wall" }
+
+void foo () throw () {}		// { dg-bogus "mangled name" }
+
+template <class T>
+T bar (T x) { return x; }	// { dg-warning "mangled name" "" { target c++14_down } }
+
+void baz () {			// { dg-bogus "mangled name" }
+  return (bar (foo)) ();
+}
+
+void decl () {}			// { dg-bogus "mangled name" }