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Re: Improve loop detection and loop header copying


Hello,

> On Wed, Feb 04, 2004 at 03:38:48PM -0700, law@redhat.com wrote:
> >  > I believe it is in the LNO branch but Zdenek also
> >  >sent patch against tree-SSA at some point that got unreviewed.
> 
> Yes, the loop header copy is enabled by default at -O1 and above, in
> the LNO branch.
> 
> > I've already spent far too much time mucking around with this -- I've got
> > a million things to deal with, so Zdenek will need to resubmit.  

I have a patch for tree-ssa also, but it currently does not bootstrap
due to latent bug in jump threading.  I will also have to measure the
impacts on produced code, and perhaps add handling of || type
conditions.

Zdenek


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