x64: reorder insts to ensure better code locality.
x64: reorder insts to ensure better code locality.

Specifically, each inst is compiled right after the first one that
refers to it though `out` or `out1`. (`out1` goes first as we can
make one less jump in that case. Branches are costly.)

pyos/re2jit,pyos/re2jit,pyos/re2jit