Hello,
[1] Regarding the patch 'Support closing_branch_deps' http://gcc.gnu.org/ml/gcc-patches/2011-03/msg00350.html Continued discussions with Ayal Zaks (SMS maintainer) regrading this patch. (http://gcc.gnu.org/ml/gcc-patches/2011-05/msg00250.html) I'm now working on simplifying the patch for resubmission according the recommendation.
[2] Regarding the patch 'Avoid considering debug_insn when calculating SCCs' http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01294.html The problem exposed while testing patch [3] and it seems that is part of a bigger problem -- SMS does not support debug_insn properly. I've asked Alexandre Oliva who inserted the support for debug_insn to haifa sched and selective sched to help with that.
[3] Regarding the patch 'Support instructions with REG_INC_NOTE' http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01309.html The fix for debug_insn (which the patch [2] tries to solve) is needed for bootstrapping this patch. So I'm putting it on hold for now.
Thanks, Revital