tree-ssa-loop-ch.c (copy_loop_headers): Loop can be null.

2004-12-13  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-loop-ch.c (copy_loop_headers): Loop can be null.
	* tree-ssa-loop-im.c (determine_lsm): tree_root may not have a real
	inner loop.

From-SVN: r92048

gcc/ChangeLog

+2004-12-13  Daniel Berlin  <dberlin@dberlin.org>
+
+	* tree-ssa-loop-ch.c (copy_loop_headers): Loop can be null.
+	* tree-ssa-loop-im.c (determine_lsm): tree_root may not have a real
+	inner loop.
+
 2004-12-12  Diego Novillo  <dnovillo@redhat.com>
 
 	* tree-gimple.c (get_base_address): Update documentation.

gcc/tree-ssa-loop-ch.c

@@ -152,6 +152,8 @@ copy_loop_headers (void)
       int limit = 20;
 
       loop = loops->parray[i];
+      if (!loop)
+	continue;
       header = loop->header;
 
       /* If the loop is already a do-while style one (either because it was

gcc/tree-ssa-loop-im.c

@@ -1252,6 +1252,9 @@ determine_lsm (struct loops *loops)
   struct loop *loop;
   basic_block bb;
 
+  if (!loops->tree_root->inner)
+    return;
+
   /* Create a UID for each statement in the function.  Ordering of the
      UIDs is not important for this pass.  */
   max_stmt_uid = 0;