* support disabling the i386 peephole optimizer with -Oonopeephole

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26673 3ad0048d-3df7-0310-abae-a5850022a9f2
  * fixed spilling of CMOVcc instruction: it "reads" operand two (in the sense
    that the value of operand two is used/kept in case the condition is false)
    (fixes mantis #25672)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26674 3ad0048d-3df7-0310-abae-a5850022a9f2