[Bug middle-end/47917] New: snprintf(..., "const string") should be optimized into memcpy

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47917

           Summary: snprintf(..., "const string") should be optimized into
                    memcpy
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: bur...@gcc.gnu.org


Jakub wrote at http://gcc.gnu.org/ml/gcc-patches/2011-02/msg01702.html

> snprintf (nml_err_msg, sizeof nml_err_msg, "Internal namelist read error");


You could just use [...]
  memcpy (nml_err_msg, "Internal namelist read error",
      sizeof "Internal namelist read error");
but snprintf above ought to be optimized into that.  Except that it isn't
(sprintf is).  So guess something that should be improved in 4.7+.