optimization/8474: -mcpu=i686 produces much faster code than -mcpu=pentium4 on a P4 machine

[giovannibajo@libero.it]

Synopsis: -mcpu=i686 produces much faster code than -mcpu=pentium4 on a P4 machine

State-Changed-From-To: open->feedback
State-Changed-By: bajo
State-Changed-When: Wed May 14 10:26:29 2003
State-Changed-Why:
    See Dara's question.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8474