Re: [avr-gcc-list] Compile error for AVR target.

[Andy Hutchinson]

This is same as bug 18251.

Im working with Roger Sayle to get patch loaded on 4.0 head really soon!

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18251



address@hidden wrote:
> Oliver Schulz wrote:
>
> > Hello maintainers,
> >
> > Since release 3.4.3 of gcc, I have a compile error with one of my 
> > unchanged
> > sources. The error is still in the current 3_4-branch (checked out 
> > today).
> >
> > ------------
> > avr-gcc -c -mmcu=atmega128 -save-temps -g -Os -Wall -Wstrict-prototypes
> > -Wsign-c
> > ompare -Wa,-ahlms=arpcache.lst -D__HARVARD_ARCH__ -I../../build/include
> > -I../..
> > /./include  ../.././net/arpcache.c -o arpcache.o
> > ../.././net/arpcache.c: In function `NutArpCacheQuery':
> > ../.././net/arpcache.c:487: error: unable to find a register to spill in
> > class `
> > POINTER_REGS'
> > ../.././net/arpcache.c:487: error: this is the insn:
> > (insn 89 206 205 5 ../.././net/arpcache.c:447 (parallel [
> >            (set (mem:BLK (reg/v/f:HI 44 [ mac ]) [0 A8])
> >                (mem:BLK (reg/v/f:HI 28 r28 [orig:46 entry ] [46]) [0 
> > A8]))
> >            (use (reg:QI 24 r24 [59]))
> >            (use (const_int 1 [0x1]))
> >            (clobber (scratch:HI))
> >            (clobber (scratch:HI))
> >            (clobber (scratch:QI))
> >        ]) 16 {*movstrqi_insn} (insn_list 86 (insn_list 88 (nil)))
> >    (expr_list:REG_DEAD (reg:QI 24 r24 [59])
> >        (expr_list:REG_DEAD (reg/v/f:HI 44 [ mac ])
> >            (expr_list:REG_UNUSED (scratch:QI)
> >                (expr_list:REG_UNUSED (scratch:HI)
> >                    (expr_list:REG_UNUSED (scratch:HI)
> >                        (nil)))))))
> > ../.././net/arpcache.c:487: confused by earlier errors, bailing out
> > make: *** [arpcache.o] Error 1
> > -------------
> >
> > If I do the compile with -fno-regmove option, or just -O1 it works fine.
> > Obviously there was a change from 3.4.2 in optimization procedures in 
> > gcc,
> > which now causes the crash...
> >
> > I know, to do further investigations, you need the complete source 
> > code. If
> > somebody wants to help, just send me a short message and I will send the
> > sources, or obtain the code directly from
> > http://www.ethernut.de/en/download.html, latest release, or via cvs from
> > http://sourceforge.net/projects/ethernut/
> >
> >
> >  
> The best thing to do is to file a bug report with the GCC project about 
> this. That way more GCC hackers can see this.
> Please include a preprocessed source test case that shows this bug.
>
> Eric
>
>
>
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