tree-ssa-pre.c (insert_aux): Break out if we hit a critical edge.

2004-07-16  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (insert_aux): Break out if we hit
	a critical edge.

From-SVN: r84841

gcc/ChangeLog

+2004-07-16  Daniel Berlin  <dberlin@dberlin.org>
+
+	* tree-ssa-pre.c (insert_aux): Break out if we hit
+	a critical edge.
+
 2004-07-16  Richard Henderson  <rth@redhat.com>
 
 	* basic-block.h (remove_fake_exit_edges): Declare.

gcc/tree-ssa-pre.c

@@ -1457,6 +1457,15 @@ insert_aux (basic_block block)
 			{
 			  tree vprime;
 			  tree edoubleprime;
+
+			  /* This can happen in the very weird case
+			     that our fake infinite loop edges have caused a
+			     critical edge to appear.  */
+			  if (EDGE_CRITICAL_P (pred))
+			    {
+			      cant_insert = true;
+			      break;
+			    }
 			  bprime = pred->src;
 			  eprime = phi_translate (node->expr,
 						  ANTIC_IN (block),