[Bug c++/17127] New: -fexpensive-optimizations causes output of wrong code

["silverbanana at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

GCC does not seem to generate the correct program for the attached program.
Amazingly it does generate the correct program if you remove the two slashes on
the marked line.

Compiled with:
g++.exe "C:\Home\Silver\Desktop\gccbug.cc" -o
"C:\Home\Silver\Desktop\gccbug.exe"   -lvfw32 --save-temps -fexceptions
-fexpensive-optimizations -O2  -I"C:\Programme\Coding\MingW\include\c++\3.4.1" 
-I"C:\Programme\Coding\Mingw\include\c++\3.4.1\mingw32" 
-I"C:\Programme\Coding\Mingw\include\c++\3.4.1\backward" 
-I"C:\Programme\Coding\Mingw\include" -L"C:\Programme\Coding\Mingw\lib"

-- 
           Summary: -fexpensive-optimizations causes output of wrong code
           Product: gcc
           Version: 3.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P1
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: silverbanana at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: 3.4.1
  GCC host triplet: 3.4.1
GCC target triplet: 3.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17127