Remove all CSE skip blocks code

Jan Hubicka
Wed Nov 22 10:25:00 GMT 2006

> Hello,
> This is another step towards GCC working in cfglayout more.  For this
> patch, I used the chain saw.  The patch removes all code related to
> CSE skip jumps, as I promised to do.  The next CSE patch (which is 
> ready too) will make CSE work on the CFG instead of on a list of insns.
> Bootstrapped and tested on x86_64-suse-linux-gnu.  OK?
> I also have a patch to remove the -fcse-skip-blocks flag, but I'm not
> sure what the policy is: Remove the flag, or keep it and make it a NOP?
> Thougths?

I think the common strategy is to turn it into obsoletted warning in one
release and remove in second.  We definition don't want to end up wtih
toushdands of NOP flags.


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