diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9704e67c64f..6d26102d9f1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jul  6 22:14:31 1998  Richard Henderson  (rth@cygnus.com)
+
+	* regclass.c (allocate_reg_info): Initialize the entire reg_data
+	virtual array.
+
 Mon Jul  6 22:09:32 1998  Ian Lance Taylor  <ian@cygnus.com>
 			  Jeff Law	    <law@cygnus.com>
 
diff --git a/gcc/regclass.c b/gcc/regclass.c
index d76ace33499..2bb6b420957 100644
--- a/gcc/regclass.c
+++ b/gcc/regclass.c
@@ -1866,9 +1866,11 @@ allocate_reg_info (num_regs, new_p, renumber_p)
 	  size_t max_index = reg_data->max_index;
 
 	  reg_next = reg_data->next;
-	  if (min_index <= num_regs)
+	  if (min_index <= regno_allocated)
 	    {
-	      size_t max = (max_index > num_regs) ? num_regs : max_index;
+	      size_t max = max_index;
+	      if (max > regno_allocated)
+		max = regno_allocated;
 	      if (!reg_data->used_p)	/* page just allocated with calloc */
 		reg_data->used_p = 1;	/* no need to zero */
 	      else