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Re: [Chicken-hackers] [PATCH] Mostly fix #1604

From: Peter Bex
Subject: Re: [Chicken-hackers] [PATCH] Mostly fix #1604
Date: Mon, 20 May 2019 15:20:26 +0200
User-agent: NeoMutt/20170113 (1.7.2)

On Mon, May 20, 2019 at 03:15:20PM +0200, address@hidden wrote:
> > > Interprocedural flow-analysis is hard, we shouldn't underestimate
> > > this. What happens when we declare a type for a toplevel function?
> >
> > If you're thinking about reassigning globals, how about making
> > -fixnum-arithmetic imply -local? If globals cannot be re-defined then
> > the types are always correct.
> >
> > If fixnum-arithmetic is wanted for speed then -local is wanted anyway,
> > not to mention global inlining.
> I understand - but I'm wary of options implying other options. This makes
> it hard to figure out the final set of applicable settings, in the name of 
> convenience
> I have made this mistake often enough. If one wants speed, "-O<n>" is probably
> the easiest and simplest way. Otherwise each option should have a single
> effect only.

I agree; this sounds like it's making a lot of assumptions about exactly
how the user wants to bend the Scheme semantics to make it faster.


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