Use 'ctr' rather than 'lr' for indirect jumps, so as not to trash the
branch predictor(s) for returns from generated code. Makes a big
difference on ppc970 (and POWER4).
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6291
as requested by Greg Parker. (The ppc32/Darwin dispatch loop is
different to the ppc32/Linux one, for example.)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4843