basic-block.h (basic_block): Add eh_beg, eh_end.

        * basic-block.h (basic_block): Add eh_beg, eh_end.
        * flow.c (entry_exit_blocks): Update.
        (find_basic_blocks): Don't allocate bb_eh_end, or pass it around.
        Call new functions.
        (find_basic_blocks_1): Don't record eh_list at each bb.  Use
        lists.c functions to allocate insn lists.
        (make_edges): Use eh_beg+eh_end, not the lists.  Split out EH
        edge creation ...
        (make_eh_edge): ... here.  New.
        (move_stray_eh_region_notes): New.
        (record_active_eh_regions): New.
        (delete_unreachable_blocks): Split out block merging ...
        (try_merge_blocks): ... here.  New.
        (merge_blocks_move_predecessor_nojumps): Remove edge arg.
        Dump debugging data.
        (merge_blocks_move_successor_nojumps): Likewise.
        (merge_blocks): Use eh_beg+eh_end to validate block movement.

From-SVN: r29565

gcc/ChangeLog

+Tue Sep 21 14:14:50 1999  Richard Henderson  <rth@cygnus.com>
+
+	* basic-block.h (basic_block): Add eh_beg, eh_end.
+	* flow.c (entry_exit_blocks): Update.
+	(find_basic_blocks): Don't allocate bb_eh_end, or pass it around.
+	Call new functions.
+	(find_basic_blocks_1): Don't record eh_list at each bb.  Use
+	lists.c functions to allocate insn lists.
+	(make_edges): Use eh_beg+eh_end, not the lists.  Split out EH
+	edge creation ...
+	(make_eh_edge): ... here.  New.
+	(move_stray_eh_region_notes): New.
+	(record_active_eh_regions): New.
+	(delete_unreachable_blocks): Split out block merging ...
+	(try_merge_blocks): ... here.  New.
+	(merge_blocks_move_predecessor_nojumps): Remove edge arg.
+	Dump debugging data.
+	(merge_blocks_move_successor_nojumps): Likewise.
+	(merge_blocks): Use eh_beg+eh_end to validate block movement.
+
 Tue Sep 21 11:15:03 1999  Martin v. Lwis  <loewis@informatik.hu-berlin.de>
 
 	* extend.texi (Bound member functions): Document unbound pmf

gcc/basic-block.h

@@ -144,6 +144,9 @@ typedef struct basic_block_def {
   int index;
   /* The loop depth of this block plus one.  */
   int loop_depth;
+
+  /* The active eh region before head and after end.  */
+  int eh_beg, eh_end;
 } *basic_block;
 
 /* Number of basic blocks in the current function.  */