------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2005-01-27 19:10 ------- Subject: Re: [4.0 Regression] IV-OPTS is O(N^3)
> Another idea: would it be possible to insert the invalidated names > during the optimization pass instead of invalidating all the symbols? > This would avoid the first pass over the scev database that search for > symbols. I don't understand this proposal. > > Note that your patch is not entirely correct -- in case loop is > > unrolled, its number of iterations is changed, so in this case > > scev_reset should clear its number of iterations unconditionally > > or the unroller should do that work on the unrolled loops? This seems to be the right approach. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18595
