[Bug c++/30866] New: [4.3 regression] Another ICE in calc_dfs_tree()

["martin at mpa-garching dot mpg dot de" <gcc-bugzilla at gcc dot gnu dot org>]

Current mainline g++ ICEs when compiling the attached test case with -O -c:

~/tmp>g++ -v -O -c bug.ii
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: /home/martin/software/gcc/configure
--prefix=/home/martin/software/ugcc --disable-multilib
--enable-languages=c++,fortran --enable-checking=release
Thread model: posix
gcc version 4.3.0 20070219 (experimental)
 /home/martin/software/ugcc/libexec/gcc/x86_64-unknown-linux-gnu/4.3.0/cc1plus
-fpreprocessed bug.ii -quiet -dumpbase bug.ii -mtune=generic -auxbase bug -O
-version -o /tmp/ccpih7d1.s
GNU C++ version 4.3.0 20070219 (experimental) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.3.0 20070219 (experimental).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4d59e94b92f55eb7790c583c1626d75b
/home/martin/software/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.3.0/../../../../include/c++/4.3.0/bits/stl_map.h:
In member function ?_Tp& std::map<_Key, _Tp, _Compare,
_Alloc>::operator[](const _Key&) [with _Key = std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, _Tp = std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, _Compare =
std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char>
> >, _Alloc = std::allocator<std::pair<const std::basic_string<char,
std::char_traits<char>, std::allocator<char> >, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > >]?:
/home/martin/software/ugcc/lib/gcc/x86_64-unknown-linux-gnu/4.3.0/../../../../include/c++/4.3.0/bits/stl_map.h:341:
internal compiler error: in calc_dfs_tree, at dominance.c:374
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


Sorry, but I don't have time to reduce this at the moment :(

It looks very similar to PR25847, but occurs even without OpenMP enabled.


-- 
           Summary: [4.3 regression] Another ICE in calc_dfs_tree()
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: martin at mpa-garching dot mpg dot de
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30866