cfgcleanup.c (try_forward_edges): Avoid infinite loop at infinite threaded loop.

	* cfgcleanup.c (try_forward_edges): Avoid infinite loop at infinite
	threaded loop.

From-SVN: r48837

gcc/ChangeLog

+Mon Jan 14 20:18:19 CET 2002  Jan Hubicka  <jh@suse.cz>
+
+	* cfgcleanup.c (try_forward_edges): Avoid infinite loop at infinite
+	threaded loop.
+
 2002-01-14  Tom Rix  <trix@redhat.com>
 
 	* config/rs6000/rs6000.md: Fix typo with sradi.

gcc/cfgcleanup.c

@@ -426,7 +426,10 @@ try_forward_edges (mode, b)
 			if (threaded_edges[i] == t)
 			  break;
 		      if (i < nthreaded_edges)
-			break;
+			{
+			  counter = n_basic_blocks;
+			  break;
+			}
 		    }
 
 		  /* Detect an infinite loop across the start block.  */

gcc/toplev.c

@@ -2810,6 +2810,7 @@ rest_of_compilation (decl)
       find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
       cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
       tem = gcse_main (insns, rtl_dump_file);
+      rebuild_jump_labels (insns);
 
       save_csb = flag_cse_skip_blocks;
       save_cfj = flag_cse_follow_jumps;