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Re: [ast-optimizer-branch]: SSA-CCP on tree-ssa
On Thu, 06 Dec 2001, Daniel Berlin wrote:
> > Even if it means duplicating some code, I'm trying to
> > figure out which option is easier to maintain in the future.
> To be honest, I think it's easier to maintain ssa-ccp with function
> Besides the only real difference being in the evaluation function, and
> walking the SSA, it would also enable us to vary the optimization
> performed based on -O level or something, or combine it with other
> optimizations just by plugging in a seperate function.
OK then. Thanks for the clarification. If it will make our life
easier, I'm all for it.
> > You don't mention bootstrap/regression test results. Particulary,
> > using -ftree-ssa. On the branch we should make -O2 trigger the
> > tree SSA transformations.
> Bootstraps okay on powerpc-linux-gnu.
With -ftree-ssa in BOOT_CFLAGS?
> Never got to checking test results.
We need to make sure it doesn't introduce regressions. Since
it's going into the ast-branch that's not such a high priority
Are you willing to keep maintaing it regularly? I'd like to
merge the branch into the trunk for the 3.2 release. If not, I
can take over as I'll be doing lots of maintenance on the branch
over the next few weeks.