m68hc11.c (m68hc11_check_z_replacement): Fix handling 68HC12 pre/post inc/dec side effects.

	* config/m68hc11/m68hc11.c (m68hc11_check_z_replacement): Fix handling
	68HC12 pre/post inc/dec side effects.

From-SVN: r61410

gcc/ChangeLog

 2003-01-16  Stephane Carrez  <stcarrez@nerim.fr>
 
+	* config/m68hc11/m68hc11.c (m68hc11_check_z_replacement): Fix handling
+	68HC12 pre/post inc/dec side effects.
+
+2003-01-16  Stephane Carrez  <stcarrez@nerim.fr>
+
 	* config/m68hc11/m68hc11.h (MASK_M6812): Define.
 
 Thu Jan 16 21:50:25 2003  J"orn Rennecke <amylaar@onetel.net.uk>

gcc/config/m68hc11/m68hc11.c

@@ -4341,7 +4341,13 @@ m68hc11_check_z_replacement (insn, info)
 		      info->z_died = 1;
 		      info->need_save_z = 0;
 		    }
-		  else
+		  else if (TARGET_M6812 && side_effects_p (src))
+                    {
+                      info->last = 0;
+                      info->must_restore_reg = 0;
+                      return 0;
+                    }
+                  else
 		    {
 		      info->save_before_last = 1;
 		    }
@@ -4418,7 +4424,13 @@ m68hc11_check_z_replacement (insn, info)
 		      info->z_died = 1;
 		      info->need_save_z = 0;
 		    }
-		  else
+		  else if (TARGET_M6812 && side_effects_p (src))
+                    {
+                      info->last = 0;
+                      info->must_restore_reg = 0;
+                      return 0;
+                    }
+                  else
 		    {
 		      info->save_before_last = 1;
 		    }