[Bug tree-optimization/35805] [ira] error in start_allocno_priorities, at ira-color.c:1806

[stevenb dot gcc at gmail dot com]

------- Comment #13 from stevenb dot gcc at gmail dot com  2009-01-02 18:45 -------
Subject: Re:  [ira] error in start_allocno_priorities, at ira-color.c:1806

On Fri, Jan 2, 2009 at 7:37 PM, Paolo Bonzini <bonzini@gnu.org> wrote:
>>> At this point, if your patch costs say 0.3%, and removing all traces
>>> DF_LR_RUN_DCE (instead scheduling a dozen more pass_fast_rtl_dce in
>>> passes.c) costs 0.5%, I'd rather see the latter, at least it's easier to
>>> look for opportunities to remove some useless DCE.
>
> I'll try to do this for 4.5.

It might be more worthwhile to just "fix" IRA to use DF_LIVE (which
Vlad should have done in the first place). Then we wouldn't need
Kenny's patch and DF_LR_RUN_DCE would still be essentially free.

Gr.
Steven


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35805