toplev.c (compile_file): Call init_regs after `word_mode' is valid.

	* toplev.c (compile_file): Call init_regs after `word_mode' is valid.
	* regclass.c (init_reg_modes): If choose_hard_reg_mode can't find a
	valid mode, fall back to word_mode.

From-SVN: r7379

gcc/regclass.c

@@ -402,7 +402,18 @@ init_reg_modes ()
   register int i;
 
   for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+    {
       reg_raw_mode[i] = choose_hard_reg_mode (i, 1);
+
+      /* If we couldn't find a valid mode, fall back to `word_mode'.
+	 ??? We assume `word_mode' has already been initialized.
+         ??? One situation in which we need to do this is on the mips where
+	 HARD_REGNO_NREGS (fpreg, [SD]Fmode) returns 2.  Ideally we'd like
+	 to use DF mode for the even registers and VOIDmode for the odd
+	 (for the cpu models where the odd ones are inaccessable).  */
+      if (reg_raw_mode[i] == VOIDmode)
+	reg_raw_mode[i] = word_mode;
+    }
 }
 
 /* Finish initializing the register sets and

gcc/toplev.c

@@ -2026,9 +2026,9 @@ compile_file (name)
   /* Some of these really don't need to be called when generating bytecode,
      but the options would have to be parsed first to know that. -bson */
   init_rtl ();
-  init_regs ();
   init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
 		  || debug_info_level == DINFO_LEVEL_VERBOSE);
+  init_regs ();
   init_decl_processing ();
   init_optabs ();
   init_stmt ();