[Bug c++/37284] New: ICE on valid code with -fstrict-alaising

[mckelvey at maskull dot com]

Does not ICE without -fstrict-aliasing:

$ g++ -c -fstrict-aliasing PatternDriverTop.cc
In file included from
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/i686-pc-cygwin/bits/c++allocator.h:40,
                 from
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/bits/allocator.h:54,
                 from
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/bits/stl_tree.h:69,
                 from
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/set:66,
                 from SeenSet.h:6,
                 from PatternDriverTop.h:6,
                 from PatternDriverTop.cc:2:
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/ext/new_allocator.h:
In member function 'void __gnu_cxx::new_allocator<_Tp>::construct(_Tp*, const
_Tp&) [with _Tp = const PatternDriver::PatternDriverTop*]':
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/ext/new_allocator.h:107:
error: Unrecognized GIMPLE statement during RTL expansion
<<<change_dynamic_type (const struct PatternDriverTop * *) D.8899)>>>
/usr/local/lib/gcc/i686-pc-cygwin/4.4.0/../../../../include/c++/4.4.0/ext/new_allocator.h:107:
internal compiler error: in gimple_to_tree, at cfgexpand.c:300
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

$ uname -a
CYGWIN_NT-5.1 MCKELVEY-XP 1.5.25(0.156/4/2) 2008-06-12 19:34 i686 Cygwin

$ g++ -v
Using built-in specs.
Target: i686-pc-cygwin
Configured with: /cygdrive/f/Home/cvsroot/gcc/configure --verbose
--enable-threads --disable-nls --disable-win32-registry
--enable-languages=c,c++
Thread model: posix
gcc version 4.4.0 20080826 (experimental) (GCC)

$ alias CONFIGURECVS
alias CONFIGURECVS='/cygdrive/f/Home/cvsroot/gcc/configure     --verbose
--enable-threads --disable-nls     --disable-win32-registry
--enable-languages=c,c++'

$ alias BUILD
alias BUILD='nice make CFLAGS='\'''\'' BOOT_CFLAGS='\'''\'' LIBCFLAGS='\''-g
-O'\''     CXXFLAGS='\''-O'\'' LIBCXXFLAGS='\''-g -O'\''     bootstrap'


-- 
           Summary: ICE on valid code with -fstrict-alaising
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mckelvey at maskull dot com
 GCC build triplet: i686-pc-cygwin
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37284