[Bug c++/71200] [7 regression] ICE (segfault) with -O3

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71200

--- Comment #2 from Martin Reinecke <martin@mpa-garching.mpg.de> ---
I'm not sure why, but on a different machine I get a more detailed error
output, which might help locating the problem:

martin@noemi-laptop ~/Downloads $ g++ -v -O3 -c testcase.ii 
Using built-in specs.
COLLECT_GCC=g++
Target: x86_64-pc-linux-gnu
Configured with: /home/martin/codes/gccgit/configure --disable-bootstrap
--disable-multilib --prefix=/home/martin/codes/utrunk
--enable-languages=c++,fortran --enable-target=all --enable-checking=release
Thread model: posix
gcc version 7.0.0 20160517 (experimental) [trunk revision
28adcc2:7f958dd:77d095c0eb3dcdf4ceca108d745301e8b29fefde] (GCC) 
COLLECT_GCC_OPTIONS='-v' '-O3' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
 /home/martin/codes/utrunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/cc1plus
-fpreprocessed testcase.ii -quiet -dumpbase testcase.ii -mtune=generic
-march=x86-64 -auxbase testcase -O3 -version -o /tmp/cchF6iTX.s
GNU C++14 (GCC) version 7.0.0 20160517 (experimental) [trunk revision
28adcc2:7f958dd:77d095c0eb3dcdf4ceca108d745301e8b29fefde] (x86_64-pc-linux-gnu)
        compiled by GNU C version 4.8.4, GMP version 5.1.3, MPFR version
3.1.2-p3, MPC version 1.0.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 7.0.0 20160517 (experimental) [trunk revision
28adcc2:7f958dd:77d095c0eb3dcdf4ceca108d745301e8b29fefde] (x86_64-pc-linux-gnu)
        compiled by GNU C version 4.8.4, GMP version 5.1.3, MPFR version
3.1.2-p3, MPC version 1.0.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5994b8b14bc318f7362472a1db0f260c
/afs/mpa/data/martin/lsnew/Healpix_cxx/moc_query.cc: In function âvoid
{anonymous}::prepPolyHelper(const std::vector<vec3_t<double> >&, const
std::vector<int>&, std::vector<MocQueryComponent>&, bool)â:
/afs/mpa/data/martin/lsnew/Healpix_cxx/moc_query.cc:275:6: internal compiler
error: Segmentation fault
0xb1972f crash_signal
        /home/martin/codes/gccgit/gcc/toplev.c:333
0xc18091 find_uses_to_rename_use
        /home/martin/codes/gccgit/gcc/tree-ssa-loop-manip.c:379
0xc18311 find_uses_to_rename_use
        /home/martin/codes/gccgit/gcc/gimple-expr.h:109
0xc18311 find_uses_to_rename_bb
        /home/martin/codes/gccgit/gcc/tree-ssa-loop-manip.c:451
0xc1a1d0 find_uses_to_rename
        /home/martin/codes/gccgit/gcc/tree-ssa-loop-manip.c:479
0xc1a1d0 rewrite_into_loop_closed_ssa_1(bitmap_head*, unsigned int, int, loop*)
        /home/martin/codes/gccgit/gcc/tree-ssa-loop-manip.c:642
0xb8b74e execute
        /home/martin/codes/gccgit/gcc/tree-loop-distribution.c:1830
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.