CLASS_CANNOT_CHANGE_MODE and CANNOT_CHANGE_MODE_CLASS in df.c

[Andreas Jaeger]

We currently have in df.c uses of CLASS_CANNOT_CHANGE_MODE which is
nowhere defined - and also have the macro CANNOT_CHANGE_MODE_CLASS.

My question is now whether the code in df.c is wrong and we should do
a s/CLASS_CANNOT_CHANGE_MODE/CANNOT_CHANGE_MODE_CLASS/; or whether
that macro can be removed completly.

Michael and Daniel, the last ChangeLog entry is this one:

2003-03-20  Daniel Berlin  <dberlin@dberlin.org>
	Merge changes from new-regalloc-branch

	From Michael Matz  <matz@suse.de>
	* df.c (df_ref_record_1): Move init of loc to safe point.
	Only recurse on interesting things in parallels.
	Handle CLASS_CANNOT_CHANGE_MODE smarter.
	(df_uses_record): Ditto.

Are you sure that this is intented?

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj