diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fa17678030e..4722a9aae04 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Wed Oct 27 00:56:59 1999  Richard Henderson  <rth@cygnus.com>
+
+	* resource.c (mark_target_live_regs): Check that the target
+	insn wasn't created after compute_bb_for_insn.
+
 Tue Oct 26 23:15:03 1999  Mark Mitchell  <mark@codesourcery.com>
 
 	* ggc-page.c (poison_pages): Don't be overzealous.
diff --git a/gcc/resource.c b/gcc/resource.c
index 9645e4d6aaa..d56552ab1ae 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -831,7 +831,8 @@ mark_target_live_regs (insns, target, res)
 	b = tinfo->block;
     }
 
-  if (b == -1)
+  if (b == -1
+      && INSN_UID (target) < (int) VARRAY_SIZE (basic_block_for_insn))
     b = BLOCK_NUM (target);
 
   if (target_hash_table != NULL)