Re: Optimization failure

["Doug Semler" <doug at seaspace dot com>]

----- Original Message -----
From: Jeffrey A Law <law@hurl.cygnus.com>
To: <kai-egcs-bug@khms.westfalen.de>
Cc: <egcs-bugs@cygnus.com>
Sent: Sunday, February 28, 1999 11:32 AM
Subject: Re: Optimization failure


>
>  In message <E10H3Id-0004jn-00@khms.westfalen.de>you write:
>  > The following example code demonstrates a problem with the optimizer:
>  > Only the first range of constants is recognized.
>  >
>  > I hope this is enough information, but if you need more, just ask :-)
>  >
>  > Source (generated by a script, otherwise I would already have
hand-optimize > d
>  > it):
>[ ... ]
>Yea.  This is a problem with the range checking optimizations.  I actually
>reported problems of this nature soon after the revamped range checking
code
>was installed into gcc2 (in ~1996).
>
>Basically we build an optimized range test for the first group of
>consecutive elements.  We'll call that A.  Then we try to optimize
>(A || (c == 0x7f).  There's no additional optimization that can be done, so
>we then try
>
>((A || (c == 0x7f)) || (c == 0x80))
>
>And so-on.
>
>I believe the way to fix this is to
>

So, you just gonna leave us hanging???? :)