Without -O3, code works as expected.
With -O3, varible is reset to 0.
Also, probably index overflow.

Where goes the .cc or .i ??

Bugzilla: Horribly scarce "user" interface!


g++ -v outputs:
Es werden eingebaute Spezifikationen verwendet.
Ziel: i486-linux-gnu
Konfiguriert mit: ../src/configure -v --with-pkgversion='Ubuntu 4.3.3-5ubuntu4'
--with-bugurl=file:///usr/share/doc/gcc-4.3/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.3
--program-suffix=-4.3 --enable-clocale=gnu --enable-libstdcxx-debug
--enable-objc-gc --enable-mpfr --enable-targets=all --with-tune=generic
--enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu
--target=i486-linux-gnu
Thread-Modell: posix
gcc-Version 4.3.3 (Ubuntu 4.3.3-5ubuntu4)


-- 
           Summary: -O3 gives wrong behaviour, no opt. OK
           Product: gcc
           Version: 4.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: vielhaber at gmail dot com
  GCC host triplet: ??? intel x86 (AMD), Ubuntu 9.04, What do you want me to
                    enter h


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40764

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