alias.c (init_alias_analysis): Use ggc_calloc instead of xrealloc.

       * alias.c (init_alias_analysis): Use ggc_calloc instead of
       xrealloc.
       (end_alias_analysis): Use ggc_free instead fo free.

From-SVN: r82251

gcc/ChangeLog

+2004-05-25  Devang Patel  <dpatel@apple.com>
+
+	* alias.c (init_alias_analysis): Use ggc_calloc instead of
+	xrealloc.
+	(end_alias_analysis): Use ggc_free instead fo free.
+	
 2004-05-25  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	PR target/15546

gcc/alias.c

@@ -2827,10 +2827,7 @@ init_alias_analysis (void)
   reg_seen = xmalloc (maxreg);
   if (! reload_completed && flag_old_unroll_loops)
     {
-      /* ??? Why are we realloc'ing if we're just going to zero it?  */
-      alias_invariant = xrealloc (alias_invariant,
-				  maxreg * sizeof (rtx));
-      memset (alias_invariant, 0, maxreg * sizeof (rtx));
+      alias_invariant = ggc_calloc (maxreg, sizeof (rtx));
       alias_invariant_size = maxreg;
     }
 
@@ -3031,7 +3028,7 @@ end_alias_analysis (void)
   reg_known_equiv_p = 0;
   if (alias_invariant)
     {
-      free (alias_invariant);
+      ggc_free (alias_invariant);
       alias_invariant = 0;
       alias_invariant_size = 0;
     }