* regclass.c (regclass): Do not use flowgraph when not optimizing.

From-SVN: r30993

gcc/ChangeLog

 Fri Dec 17 12:08:11 MET 1999  Jan Hubicka  <hubicka@freesoftr.cz>
 
+	* regclass.c (regclass): Do not use flowgraph when not optimizing.
+
 	* gcse.c (try_replace_reg): Do replacements in REG_EQUAL/REG_EQUIV
 	notes too, create one when replacement failed, attempt to simplify
 	resulting notes.

gcc/regclass.c

@@ -1070,11 +1070,16 @@ regclass (f, nregs, dump)
       bzero (in_inc_dec, nregs);
 #endif
 
-      loop_cost = 1;
-
       /* Scan the instructions and record each time it would
 	 save code to put a certain register in a certain class.  */
 
+      if (!optimize)
+	{
+	  loop_cost = 1;
+	  for (insn = f; insn; insn = NEXT_INSN (insn))
+	    insn = scan_one_insn (insn, pass);
+	}
+      else
 	for (index = 0; index < n_basic_blocks; index++)	
 	  {
 	    basic_block bb = BASIC_BLOCK (index);