* do not reuse register on x86 either

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25911 3ad0048d-3df7-0310-abae-a5850022a9f2
* set p to a valid instruction

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25912 3ad0048d-3df7-0310-abae-a5850022a9f2