[Bug c++/27369] New: tree check ICE when attribute externally_visible used

["gcc-bugzilla at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

When compiling a C++ program (for the AVR target) that defines interrupt
vectors using the externally_visible attribute, I get this ICE message:

avrlib/bits/atmega128_usart.cpp:20: internal compiler error: tree check:
expected tree that contains 'decl minimal' structure, have 'omp_atomic'  in
eq_node, at cgraph.c:175

Environment:
System: Darwin Neds-Mini.local 8.6.0 Darwin Kernel Version 8.6.0: Tue Mar 7
16:58:48 PST 2006; root:xnu-792.6.70.obj~1/RELEASE_PPC Power Macintosh powerpc
host: powerpc-apple-darwin8.6.0
build: powerpc-apple-darwin8.6.0
target: avr-unknown-none
configured with:
/opt/local/var/db/dports/build/_Users_ned_src_darwinports_dports_cross_avr-gcc/work/gcc-4.2-20060429/configure
--prefix=/opt/local --infodir=/opt/local/share/info
--mandir=/opt/local/share/man --target=avr --program-prefix=avr-
--with-included-gettext --enable-obsolete
--with-gxx-include-dir=/opt/local/avr/include/c++/4.2-20060429/
--disable-libssp --enable-languages=c,c++

How-To-Repeat:

Compile the attached hw.ii file with:

avr-g++ -fno-exceptions -funsigned-char -funsigned-bitfields -fpack-struct
-fshort-enums -ggdb -O2 -Wall -Wextra -Wshadow -mmcu=atmega128 -xc++ -c -o hw.o
hw.ii


------- Comment #1 from ned at bike-nomad dot com  2006-05-01 14:38 -------
Fix:

Remove the externally_visible attributes on the vector definitions (lines 1998
to 2020) 
in attached file hw.ii and recompile:

sed -e '1998,2020s/, externally_visible//' hw.ii > hwgood.cpp

avr-g++ -fno-exceptions -funsigned-char -funsigned-bitfields -fpack-struct
-fshort-enums -ggdb -O2 -Wall -Wextra -Wshadow -mmcu=atmega128 -xc++ -c -o
hwgood.o hwgood.cpp


-- 
           Summary: tree check ICE when attribute externally_visible used
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ned at bike-nomad dot com
 GCC build triplet: powerpc-apple-darwin8.6.0
  GCC host triplet: powerpc-apple-darwin8.6.0
GCC target triplet: avr-unknown-none


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27369