[patch 2/3] tm.texi documentation on macro PREFERRED_RENAME_CLASS

[Anatoly Sokolov]

Hi

Use reg_class_t instead of enum reg_class in midle end.

> +       enum reg_class cl;
+       reg_class_t cl;
>        if (DEBUG_INSN_P (tmp->insn))
>   continue;
>        n_uses++;
 
>+       cl = (enum reg_class) 
>+  targetm.preferred_rename_class(tmp->cl);
+       cl = targetm.preferred_rename_class(tmp->cl);
>        IOR_COMPL_HARD_REG_SET (this_unavailable,
>-          reg_class_contents[tmp->cl]);
>+          reg_class_contents[cl]);
+          reg_class_contents[(int) cl]);

Anatoly.