gengenrtl.c (gencode): Always use bzero to clear memory instead of dangerous casts and stores.

        * gengenrtl.c (gencode): Always use bzero to clear memory instead
        of dangerous casts and stores.
Fixes alpha & sparc -O3 bootstrap problems.

From-SVN: r24420

gcc/ChangeLog

 Sat Dec 26 09:17:04 1998  Jeffrey A Law  (law@cygnus.com)
 
+	* gengenrtl.c (gencode): Always use bzero to clear memory instead
+	of dangerous casts and stores.
+
 	* Makefile.in (compare, gnucompare): Add missing else true clauses.
 
 Fri Dec 25 23:00:56 1998  Jeffrey A Law  (law@cygnus.com)

gcc/gengenrtl.c

@@ -268,11 +268,6 @@ gencode (f)
   fputs ("static rtx obstack_alloc_rtx (length)\n", f);
   fputs ("     register int length;\n{\n", f);
   fputs ("  rtx rt = (rtx) obstack_alloc (rtl_obstack, length);\n\n", f);
-  fputs ("  if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(int))\n", f);
-  fputs ("    *(int *)rt = 0;\n", f);
-  fputs ("  else if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(HOST_WIDE_INT))\n", f);
-  fputs ("    *(HOST_WIDE_INT *)rt = 0;\n", f);
-  fputs ("  else\n", f);
   fputs ("  bzero((char *) rt, sizeof(struct rtx_def) - sizeof(rtunion));\n\n", f);
   fputs ("  return rt;\n}\n\n", f);