Extend comment for SET_TYPE to mention Chill.

From-SVN: r8465

diff --git a/gcc/tree.def b/gcc/tree.def
index 71d638640eb6a46a5195cc941135a6c09d4c2d48..1338a73b65a36f6102645d86892a9a9ef96d19ac 100644 (file)
--- a/gcc/tree.def
+++ b/gcc/tree.def
@@ -200,7 +200,9 @@ DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
 DEFTREECODE (ARRAY_TYPE, "array_type", "t", 0)
 
 /* Types of sets for Pascal.  Special fields are the same as
-   in an array type.  The target type is always a boolean type.  */
+   in an array type.  The target type is always a boolean type.
+   Used for both bitstrings and powersets in Chill;
+   TYPE_STRING_FLAG indicates a bitstring. */
 DEFTREECODE (SET_TYPE, "set_type", "t", 0)
 
 /* Struct in C, or record in Pascal.  */