[Bug bootstrap/37091] New: Rev 138207 causes ICE using bootstrap for crt for win64

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

Building for a target of win64 on cygwin results in an ICE while building the
crt for the toolchain.  Using this sequence:

binutils
all-gcc
crt
gcc

The crt phase dies as follows:

x86_64-pc-mingw32-gcc -DHAVE_CONFIG_H -I.
-I/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj/../mingw-w64-crt
-I/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj/../mingw-w64-crt/include64
-D_CRTBLD
-I/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/root/mingw/include
 -pipe  -Wall -std=gnu99 -g -O2 -MT gdtoa/lib64_libmingwex_a-gethex.o -MD -MP
-MF gdtoa/.deps/lib64_libmingwex_a-gethex.Tpo -c -o
gdtoa/lib64_libmingwex_a-gethex.o `test -f 'gdtoa/gethex.c' || echo
'/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj/../mingw-w64-crt/'`gdtoa/gethex.c
/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj/../mingw-w64-crt/gdtoa/gethex.c:
In function '__gethex_D2A':
/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj/../mingw-w64-crt/gdtoa/gethex.c:45:
internal compiler error: tree check: accessed elt 4 of tree_vec with 3
elts in find_switch_asserts, at tree-vrp.c:4346
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[1]: *** [gdtoa/lib64_libmingwex_a-gethex.o] Error 1
make[1]: Leaving directory
`/var/lib/buildbot/slave-vista64-cyg32/cygwin-x86/build/mingw/obj'
make: *** [all] Error 2


Here's the file:

http://mingw-w64.svn.sourceforge.net/viewvc/mingw-w64/trunk/mingw-w64-crt/gdtoa/gethex.c?view=markup


At this stage, the newly built gcc is used to build the crt, so it's the stage
1 gcc that is dying.


-- 
           Summary: Rev 138207 causes ICE using bootstrap for crt for win64
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: nightstrike at gmail dot com
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: x86_64-pc-mingw32


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37091