Re: [sdcc-devel] [ sdcc-Bugs-474687 ] Nested loops compile to evil assembly

[Johan K. <joh...@id...>]

That must have been

http://www.geocrawler.com/lists/3/SourceForge/1557/125/6794785/

although I am not sure about my explanation anymore.

Johan

----- Original Message -----
From: Sandeep Dutta <sa...@wi...>
To: <sdc...@li...>
Sent: Friday, October 26, 2001 4:10 PM
Subject: RE: [sdcc-devel] [ sdcc-Bugs-474687 ] Nested loops compile to evil
assembly


> Yes I will, What was the last change you made for this problem ?
> I seem to recall something like symLevel ...
> Sandeep
>
> > -----Original Message-----
> > From: sdc...@li...
> > [mailto:sdc...@li...]On Behalf Of Johan Knol
> > Sent: Friday, October 26, 2001 6:30 AM
> > To: sdc...@li...
> > Subject: Re: [sdcc-devel] [ sdcc-Bugs-474687 ] Nested loops compile to
> > evil assembly
> >
> >
> > Fixed in SDCClrange.c:1.11, although this may not be the most optimal
> > solution. Maybe Sandeep wants to have a second look at it.
> >
> > Johan
> >
> > ----- Original Message -----
> > From: <no...@so...>
> > To: <no...@so...>
> > Sent: Thursday, October 25, 2001 2:32 AM
> > Subject: [sdcc-devel] [ sdcc-Bugs-474687 ] Nested loops
> > compile to evil
> > assembly
> >
> >
> > > Bugs item #474687, was opened at 2001-10-24 17:32
> > > You can respond by visiting:
> > >
> > http://sourceforge.net/tracker/?func=detail&atid=100599&aid=47
> > 4687&group_id=
> > 599
> > >
> > > Category: C-Front End
> > > Group: known bugs
> > > Status: Open
> > > Resolution: None
> > > Priority: 5
> > > Submitted By: Saul Thurrowgood (sault)
> > > Assigned to: Nobody/Anonymous (nobody)
> > > Summary: Nested loops compile to evil assembly
> > >
> > > Initial Comment:
> > > Although this is a silly piece of C, it does show up a
> > > bug with sdcc (also, couldn't most of the code be
> > > replaced with djnz?):
> > >
> > > void main(void)
> > > {
> > >         unsigned char i, j, k, l, m;
> > >
> > >         for (i = 0xff; --i; )
> > >                 for (j = 0xff; --j; )
> > >                         for (k = 0xff; --k; )
> > >                                 for (l = 0xff; --l; )
> > >                                         for (m = 0xff;
> > > --m; );
> > > }
> > >
> > >
> > > Compiled with SDCC : mcs51 2.3.1 (Oct 23 2001) (UNIX)
> > > $ sdcc test.c
> > > ----------------------------------------------------------------
> > >
> > > _main:
> > >         ar2 = 0x02
> > >         ar3 = 0x03
> > >         ar4 = 0x04
> > >         ar5 = 0x05
> > >         ar6 = 0x06
> > >         ar7 = 0x07
> > >         ar0 = 0x00
> > >         ar1 = 0x01
> > >         mov     r2,#0xFF
> > > 00113$:
> > >         dec     r2
> > >         mov     a,r2
> > >         jz  00116$
> > > 00128$:
> > >         mov     r3,#0xFF
> > > 00110$:
> > >         dec     r3
> > >         mov     a,r3
> > >         jz  00113$
> > > 00129$:
> > >         mov     r3,#0xFF
> > > 00107$:
> > >         dec     r3
> > >         mov     a,r3
> > >         jz  00110$
> > > 00130$:
> > >         mov     r3,#0xFF
> > > 00104$:
> > >         dec     r3
> > >         mov     a,r3
> > >         jz  00107$
> > > 00131$:
> > >         mov     r3,#0xFF
> > > 00101$:
> > >         dec     r3
> > >         mov     a,r3
> > >         jz  00104$
> > > 00132$:
> > >         sjmp 00101$
> > > 00116$:
> > >         ret
> > >
> > >
> > >
> > ----------------------------------------------------------------------
> > >
> > > You can respond by visiting:
> > >
> > http://sourceforge.net/tracker/?func=detail&atid=100599&aid=47
> 4687&group_id=
> 599
> >
> > _______________________________________________
> > sdcc-devel mailing list
> > sdc...@li...
> > https://lists.sourceforge.net/lists/listinfo/sdcc-devel
> >
>
>
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