[Bug c/24015] New: Wrong code generated when using optimizer

[buergel at limmat dot ch]

gcc produces wrong code when optimizer (O1 O2 or O3) is used.
The c-source showing the problem is generated by the flex lexical scanner.
Applies to gcc versions 3.0.4, 3.3.5 and 3.4.4 (and maybe others not tested).
Tested on Debian/Intel platforms only.
On gcc 2.95 and multiple former versions of gcc, the problem does not occur.

-- 
           Summary: Wrong code generated when using optimizer
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: buergel at limmat dot ch
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i486-pc-linux-gnu
  GCC host triplet: i486-pc-linux-gnu
GCC target triplet: i486-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24015