mips.c (mips_restore_gp_from_cprestore_slot): Emit a note when expanding to nothing.

gcc/
	* config/mips/mips.c (mips_restore_gp_from_cprestore_slot): Emit
	a note when expanding to nothing.

From-SVN: r153540

gcc/ChangeLog

+2009-10-25  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* config/mips/mips.c (mips_restore_gp_from_cprestore_slot): Emit
+	a note when expanding to nothing.
+
 2009-10-25  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/41814

gcc/config/mips/mips.c

@@ -9537,7 +9537,10 @@ mips_restore_gp_from_cprestore_slot (rtx temp)
   gcc_assert (TARGET_ABICALLS && TARGET_OLDABI && epilogue_completed);
 
   if (!cfun->machine->must_restore_gp_when_clobbered_p)
-    return;
+    {
+      emit_note (NOTE_INSN_DELETED);
+      return;
+    }
 
   if (TARGET_MIPS16)
     {