stor-layout.c (round_up): Check for 0/1 before dividing.

        * stor-layout.c (round_up): Check for 0/1 before dividing.
        (round_down): Likewise.

From-SVN: r85792

gcc/ChangeLog

 2004-08-10  Richard Henderson  <rth@redhat.com>
 
+	* stor-layout.c (round_up): Check for 0/1 before dividing.
+	(round_down): Likewise.
+
 	* tree-tailcall.c (suitable_for_tail_opt_p): Also check DECL_EXTERNAL.
 
 2004-08-09  Mark Mitchell  <mark@codesourcery.com>

gcc/stor-layout.c

@@ -277,6 +277,11 @@ round_up (tree value, int divisor)
 {
   tree t;
 
+  if (divisor == 0)
+    abort ();
+  if (divisor == 1)
+    return value;
+
   /* If divisor is a power of two, simplify this to bit manipulation.  */
   if (divisor == (divisor & -divisor))
     {
@@ -302,6 +307,11 @@ round_down (tree value, int divisor)
 {
   tree t;
 
+  if (divisor == 0)
+    abort ();
+  if (divisor == 1)
+    return value;
+
   /* If divisor is a power of two, simplify this to bit manipulation.  */
   if (divisor == (divisor & -divisor))
     {