------- Comment #4 from jakub at gcc dot gnu dot org 2008-12-06 13:06 ------- Apparently caused by my PR37248 patch. We have a volatile bitfield, and the patch (similarly to 4.3) creates a TREE_THIS_VOLATILE TREE_SIDE_EFFECTS BIT_FIELD_REF, but apparently the trunk is upset about it.
Either we just don't try to optimize volatile bitfields at all (don't create BIT_FIELD_REFs for them), or some changes are needed to handle volatile BIT_FIELD_REFs. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38428
