GNU bug report logs - #12883
[2.0.6] CSE bug

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From: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 12883 <at> debbugs.gnu.org
Subject: bug#12883: [2.0.6] CSE bug
Date: Thu, 15 Nov 2012 17:28:50 +0100

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This is better!



On Thu, Nov 15, 2012 at 5:24 PM, Ludovic Courtès <ludo <at> gnu.org> wrote:

> Hi Stefan!
>
> Stefan Israelsson Tampe <stefan.itampe <at> gmail.com> skribis:
>
> > --- a/module/language/tree-il/cse.scm
> > +++ b/module/language/tree-il/cse.scm
> > @@ -324,10 +324,11 @@
> >                 (and (< n env-len)
> >                      (match (vlist-ref env n)
> >                        ((#(exp* name sym db-len*) . h*)
> > -                       (and (unroll db m (- db-len db-len*))
> > -                            (if (and (= h h*) (tree-il=? exp* exp))
> > -                                (make-lexical-ref (tree-il-src exp)
> name sym)
> > -                                (lp (1+ n) (- db-len db-len*))))))))))))
> > +                       (let ((niter (- (- db-len db-len*) m)))
> > +                         (and (unroll db m (- db-len db-len*))
> > +                              (if (and (= h h*) (tree-il=? exp* exp))
> > +                                  (make-lexical-ref (tree-il-src exp)
> name sym)
> > +                                  (lp (1+ n) (- db-len
> db-len*)))))))))))))
> >
> >    (define (lookup-lexical sym env)
> >      (let ((env-len (vlist-length env)))
>
> Hmm, the only thing it changes is that an unused variable is introduced,
> no?  Am I missing something?
>
> Thanks,
> Ludo’.
>

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