Parallelize istring creation (#1008)

* parallelize istring creation, by having a thread-local set and a global set guarded by a mutex. each time a new string shows up in a thread, it will be added to that thread's set, after accessing the global set through the lock first, which means we lock at most once per new string per thread

* don't leak strings in istring store

* since we now create names in a parallel thread-safe manner, we don't need to pre-create names in RelooperJumpThreading

0 files changed, 0 insertions, 0 deletions