genmodes.c (calc_wider_mode): Allocate enough room for all the entries we'll…

genmodes.c (calc_wider_mode): Allocate enough room for all the entries we'll possibly assign in the sort buffer.

	* genmodes.c (calc_wider_mode): Allocate enough room for all the
	entries we'll possibly assign in the sort buffer.

From-SVN: r72531

gcc/ChangeLog

+2003-10-15  Olivier Hainque  <hainque@act-europe.fr>
+
+	* genmodes.c (calc_wider_mode): Allocate enough room for all the
+	entries we'll possibly assign in the sort buffer.
+	
 2003-10-15  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* config.gcc (s390x-ibm-tpf*): New target.

gcc/genmodes.c

@@ -587,7 +587,9 @@ calc_wider_mode (void)
   for (c = 0; c < MAX_MODE_CLASS; c++)
     max_n_modes = MAX (max_n_modes, n_modes[c]);
 
-  sortbuf = alloca (max_n_modes * sizeof (struct mode_data *));
+  /* Allocate max_n_modes + 1 entries to leave room for the extra null
+     pointer assigned after the qsort call below.  */
+  sortbuf = alloca ((max_n_modes + 1) * sizeof (struct mode_data *));
 
   for (c = 0; c < MAX_MODE_CLASS; c++)
     {