c++: Add some asserts in mangle.c

The added asserts are places I noticed that we aren't adding the "on" to
distinguish an operator name from an expression involving the operator.
Hopefully that's because operator names never get there; if not, crash bug
reports will let us fix the issue.

gcc/cp/ChangeLog:

	* mangle.c (write_member_name): Add assert.
	(write_expression): Add asserts.

1 files changed, 8 insertions, 2 deletions

diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
index c1d9c73..7c32e22 100644
--- a/gcc/cp/mangle.c
+++ b/gcc/cp/mangle.c
@@ -2877,7 +2877,10 @@ write_member_name (tree member)
       write_unqualified_id (member);
     }
   else if (DECL_P (member))
-    write_unqualified_name (member);
+    {
+      gcc_assert (!DECL_OVERLOADED_OPERATOR_P (member));
+      write_unqualified_name (member);
+    }
   else if (TREE_CODE (member) == TEMPLATE_ID_EXPR)
     {
       tree name = TREE_OPERAND (member, 0);
@@ -3162,6 +3165,7 @@ write_expression (tree expr)
 	write_expression (member);
       else
 	{
+	  gcc_assert (code != BASELINK || BASELINK_QUALIFIED_P (expr));
 	  write_string ("sr");
 	  write_type (scope);
 	  write_member_name (member);
@@ -3344,7 +3348,9 @@ write_expression (tree expr)
     }
   else if (dependent_name (expr))
     {
-      write_unqualified_id (dependent_name (expr));
+      tree name = dependent_name (expr);
+      gcc_assert (!IDENTIFIER_ANY_OP_P (name));
+      write_unqualified_id (name);
     }
   else
     {