[Bug c++/18468] New: bad code in template function called from template class method

[james_avera at yahoo dot com]

A template function (which swaps two values)
is called in a loop in an inlined method of a template class.  The number
of loop iterations is a constant, so the compiler might be trying to unroll
the loop.

The final assignment of the swap function is not executed after the
first iteration, causing incorrect results.

The problem occurs with -O2 or -O3, but not with -O.

I will attach a self-contained demo program.

-- 
           Summary: bad code in template function called from template class
                    method
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: james_avera at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i586-suse-linux-gnu
  GCC host triplet: i586-suse-linux-gnu
GCC target triplet: i586-suse-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18468