target/8734: [x86_64] -O2 breaks something in 3.2.1

[bangerth@dealii.org]

Synopsis: [x86_64] -O2 breaks something in 3.2.1

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Thu May 15 04:34:39 2003
State-Changed-Why:
    See Dara's question

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8734