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[Bug rtl-optimization/45352] ICE: in reset_sched_cycles_in_current_ebb, at sel-sched.c:7058


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45352

--- Comment #22 from Andrey Belevantsev <abel at gcc dot gnu.org> 2010-12-21 12:10:32 UTC ---
Created attachment 22834
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22834
Another patch

This patch should fix the last attachment from this bug and also the tests from
46521/46522.  The patch solves two problems:
- propagates the rescheduling bits also through empty blocks;
- fixes the (wrong) assumption that if we need to stall for N cycles because of
the DFA, and for M > N cycles because of the data dependency, then after M
cycles the DFA will be ready to issue.  Actually, we need to recheck the DFA
after M cycles again.

I will submit the patch tomorrow after further testing and I can commit it
either until Friday or next January, so Zdenek, please let me know if there are
further problems with this patch.


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