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Re: [PATCH] Fix PR23744, VRP not merging discontinuous ranges of PHIs

On 5/16/06, Duncan Sands <> wrote:
On Monday 15 May 2006 18:16, Diego Novillo wrote:
> Duncan Sands wrote on 05/05/06 05:10:
> >     PR tree-optimization/23744
> >     * tree-vrp.c (vrp_meet): do not require ranges to intersect.
> >
> This will be more appropriate for the next stage 1.  In the meantime, I
> would like to see compile time impact analysis on real code (I can help
> out with the usual suspects I have around: cc1-i-files, DLV, MICO, SPEC,
> etc).
> You are lengthening the simulation by slowing down the decay into

You are correct, this may be a problem.  I will try to do some benchmarking,
but it may take a few days.  In the meantime, Richard Guenther has kindly
agreed run the patch through his C++ tester.

The results show compile time changes in the noise and at worst a slight <0.1% memory usage increase for tramp3d. Runtimes for libstdc++ performance testsuite improves, other tests are in the noise for runtime effects. Polyhedron showed no effect on compile time or runtime.


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