1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index d26b0f8..0e056f3 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -1420,6 +1420,24 @@ extern dump_user_location_t vect_location;
 #define DUMP_VECT_SCOPE(MSG) \
   AUTO_DUMP_SCOPE (MSG, vect_location)
 
+/* A sentinel class for ensuring that the "vect_location" global gets
+   reset at the end of a scope.
+
+   The "vect_location" global is used during dumping and contains a
+   location_t, which could contain references to a tree block via the
+   ad-hoc data.  This data is used for tracking inlining information,
+   but it's not a GC root; it's simply assumed that such locations never
+   get accessed if the blocks are optimized away.
+
+   Hence we need to ensure that such locations are purged at the end
+   of any operations using them (e.g. via this class).  */
+
+class auto_purge_vect_location
+{
+ public:
+  ~auto_purge_vect_location ();
+};
+
 /*-----------------------------------------------------------------*/
 /* Function prototypes.                                            */
 /*-----------------------------------------------------------------*/