re PR rtl-optimization/21144 (Apparent infinite loop in reload)

        PR rtl-optimization/21144
        * postreload.c (reload_cse_move2add): Check for VOIDmode.

From-SVN: r99008

gcc/ChangeLog

+2005-04-29  Michael Matz  <matz@suse.de>
+
+	PR rtl-optimization/21144
+	* postreload.c (reload_cse_move2add): Check for VOIDmode.
+
 2005-04-29  Bob Wilson  <bob.wilson@acm.org>
 
 	* config/xtensa/xtensa.h (OPTIMIZATION_OPTIONS): Define to disable

gcc/postreload.c

@@ -1269,7 +1269,8 @@ reload_cse_move2add (rtx first)
 		    {
 		      enum machine_mode narrow_mode;
 		      for (narrow_mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
-			   narrow_mode != GET_MODE (reg);
+			   narrow_mode != VOIDmode
+			   && narrow_mode != GET_MODE (reg);
 			   narrow_mode = GET_MODE_WIDER_MODE (narrow_mode))
 			{
 			  if (have_insn_for (STRICT_LOW_PART, narrow_mode)