avr-gcc error: could not split insn

[Ildefonso Camargo]

Greetings,

I seem to be hitting this bug:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47509

on the Ubuntu package on precise.

For now, I worked it around by using -O1, but that's not very good for embedded, -Os will be better, but it fails:

avr-gcc -Wall -mmcu=atmega1284p -g -fpack-struct -Os -funsigned-char -funsigned-bitfields -mcall-prologues -Wstrict-prototypes -std=gnu99 -I. -I../..//apps/dhcpc -I../..//apps/port_app_mapper -I../..//apps/resolv -I../..//apps/telnetd -I../..//apps/webclient.PROGMEM -I../..//apps/webserver.PROGMEM -I../..//drivers/enc28j60.tux -I../..//libs/avrlib-avrlib-conf -I../..//libs/memb -I../..//libs/net_conf -I../..//libs/prod_conf -I../..//libs/websrv_helper_functions -I../..//libs/webstrings_common.PROGMEM -I../..//drivers/interfaces -I../..//libs/interfaces -I../..//uip -c ../..//apps/port_app_mapper/port_app_mapper.c -o obj/port_app_mapper.o
../..//apps/port_app_mapper/port_app_mapper.c: In function ‘uip_port_app_mapper’:
../..//apps/port_app_mapper/port_app_mapper.c:93:1: error: could not split insn
(insn 67 66 68 ../..//apps/port_app_mapper/port_app_mapper.c:85 (parallel [
            (set (reg:HI 16 r16 [86])
                (rotate:HI (reg:HI 16 r16 [orig:74 D.3131 ] [74])
                    (const_int 8 [0x8])))
            (clobber (mem/c:QI (plus:HI (reg/f:HI 28 r28)
                        (const_int 1 [0x1])) [10 %sfp+1 S1 A8]))
        ]) 936 {*rotbhi} (nil))
../..//apps/port_app_mapper/port_app_mapper.c:93:1: internal compiler error: in final_scan_insn, at final.c:2650
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [obj/port_app_mapper.o] Error 1

I'm compiling avr-uip, from here:

http://code.google.com/p/avr-uip/

It would be good to either upgrade the version, or backport the patch.

Thanks!

Ildefonso Camargo

[Ildefonso Camargo (icamargo)]

Sorry, pasted the wrong URL:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49487

That's the bug on gcc. Well, the link was on the other bug too, but here is the direct link just in case.

Also, the patch seems to be this one:

http://gcc.gnu.org/viewcvs?view=revision&revision=176277

Ildefonso.