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-rw-r--r--gcc/tree.def4
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree.def b/gcc/tree.def
index 71d638640eb..1338a73b65a 100644
--- 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. */