optimization/10593: -O2 dead-code optimization removes the wrong code

[bangerth@dealii.org]

Synopsis: -O2 dead-code optimization removes the wrong code

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Fri May  2 00:33:47 2003
State-Changed-Why:
    2.95 is a very old release. Can you say anything about
    whether the problem still occurs with newer versions of
    gcc?
    
    Thanks
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10593