On 05/11/2011 10:04 AM, Richard Sandiford wrote: > Neat! It'll be interesting to see how easy it would be to convert > recog and in-tree delayed-branch targets to use this form instead of > SEQUENCEs. It'd certainly be a big step towards keeping the CFG > around during and after md-reorg. I might look at that (getting > rid of SEQUENCEs in the insn stream) "if I have time". But... > > ...your message and examples all seem to emphasis unconditional jumps. > How good a job does the scheduler do for conditional jumps? E.g. do we > steal from the branch target in cases where that's useful?
It uses sched-ebb, which means it sort of does a reasonable job, but it's weaker than reorg.c in some respects. I'd like to turn sched-ebb into sched-dag and add better support for predicating insns when moving them across a branch (there's some code for it in c6x.c), but that'll need more work. Bernd
