------- Comment #12 from spark at gcc dot gnu dot org 2007-11-21 20:40 -------
At the end of fwprop2 pass in fwprop_done(), we call cleanup_cfg()
and it merges a few blocks, making some bb disappear (in this particular case,
bb index 25), which clears the bit in df_chain->out_of_date_transfer_functions.
Then, somehow, some of the insns originating from 25 has their bb numbers not
reset, and later those insns get the new bb numbers assigned, at which point we
call df_insn_change_bb(), which sets the bit for the deleted block on
out_of_date_transfer_functions map.
Then after fwprop, TODO runs df_finish_pass and we bomb.
I'm working on a fix.
--
spark at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Last reconfirmed|2007-11-21 17:47:04 |2007-11-21 20:40:45
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34171
