PR middle-end/28071

* sched-int.h (struct deps): Split field 'pending_lists_length' into
'pending_read_list_length' and 'pending_write_list_length'.  Update
comment.
* sched-deps.c (add_insn_mem_dependence): Change signature.  Update
to handle two length counters instead of one.  Update all uses.
(flush_pending_lists, sched_analyze_1, init_deps): Update to handle
two length counters instead of one.
* sched-rgn.c (propagate_deps): Update to handle two length counters
instead of one.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@123874 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 5 deletions

diff --git a/gcc/sched-int.h b/gcc/sched-int.h
index b6396570de2..3ea245b6f39 100644
--- a/gcc/sched-int.h
+++ b/gcc/sched-int.h
@@ -278,11 +278,16 @@ struct deps
   /* An EXPR_LIST containing all MEM rtx's which are pending writes.  */
   rtx pending_write_mems;
 
-  /* Indicates the combined length of the two pending lists.  We must prevent
-     these lists from ever growing too large since the number of dependencies
-     produced is at least O(N*N), and execution time is at least O(4*N*N), as
-     a function of the length of these pending lists.  */
-  int pending_lists_length;
+  /* We must prevent the above lists from ever growing too large since
+     the number of dependencies produced is at least O(N*N),
+     and execution time is at least O(4*N*N), as a function of the
+     length of these pending lists.  */
+
+  /* Indicates the length of the pending_read list.  */
+  int pending_read_list_length;
+
+  /* Indicates the length of the pending_write list.  */
+  int pending_write_list_length;
 
   /* Length of the pending memory flush list. Large functions with no
      calls may build up extremely large lists.  */