PR c++/91819 - ICE with operator++ and enum.

	* call.c (build_new_op_1): Set arg2_type.

	* g++.dg/other/operator4.C: New test.

From-SVN: r276027

gcc/cp/ChangeLog

+2019-09-22  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/91819 - ICE with operator++ and enum.
+	* call.c (build_new_op_1): Set arg2_type.
+
 2019-09-17  Jason Merrill  <jason@redhat.com>
 
 	* parser.c (cp_parser_statement): Handle [[likely]] on

gcc/cp/call.c

@@ -5878,7 +5878,10 @@ build_new_op_1 (const op_location_t &loc, enum tree_code code, int flags,
     goto builtin;
 
   if (code == POSTINCREMENT_EXPR || code == POSTDECREMENT_EXPR)
-    arg2 = integer_zero_node;
+    {
+      arg2 = integer_zero_node;
+      arg2_type = integer_type_node;
+    }
 
   vec_alloc (arglist, 3);
   arglist->quick_push (arg1);

gcc/testsuite/ChangeLog

+2019-09-22  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/91819 - ICE with operator++ and enum.
+	* g++.dg/other/operator4.C: New test.
+
 2019-09-21  Martin Sebor  <msebor@redhat.com>
 
 	PR middle-end/91830

gcc/testsuite/g++.dg/other/operator4.C

+// PR c++/91819 - ICE with operator++ and enum.
+// { dg-do compile }
+
+enum Foo
+{
+  a,
+  b
+};
+
+inline Foo operator++(Foo &f, int) 
+{
+  return f = (Foo)(f + 1);
+}
+
+int main()
+{
+  int count = 0;
+  for (Foo f = a; f <= b; f++) {
+    count++;
+  }
+  return count;
+}