re PR middle-end/53031 (gcc.dg/tree-ssa/vrp54.c scan-tree-dump-not vrp1 "link_error")

2012-04-19  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53031
	* tree-vrp.c (adjust_range_with_scev): Revert back to
	using max_loop_iterations.

From-SVN: r186592

gcc/ChangeLog

+2012-04-19  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/53031
+	* tree-vrp.c (adjust_range_with_scev): Revert back to
+	using max_loop_iterations.
+
 2012-04-19  Michael Matz  <matz@suse.de>
 
 	* diagnostic.c (emit_diagnostic): Move va_end call after user

gcc/tree-vrp.c

@@ -3420,7 +3420,9 @@ adjust_range_with_scev (value_range_t *vr, struct loop *loop,
     {
       double_int nit;
 
-      if (max_stmt_executions (loop, &nit))
+      /* We are only entering here for loop header PHI nodes, so using
+	 the number of latch executions is the correct thing to use.  */
+      if (max_loop_iterations (loop, &nit))
 	{
 	  value_range_t maxvr = { VR_UNDEFINED, NULL_TREE, NULL_TREE, NULL };
 	  double_int dtmp;