Reg utility fix
Long ago in a galaxy far away, there was a trace compiler that
handled short code fragments with a small, sparse and variable
set of temp registers. In that situation, doing linear reg
lookups wasn't terrible. In the new world that has a fixed and
packed set of registers, a linear search is unnecessary, foolish
and wasteful. [P.S. perf showed that roughly 25% of all
compilation time was spent doing register manipulation!]
Change-Id: I6f23d9f70367fb4139cc28a27fd9fdf8beffa270
4 files changed