Move inst_ out of the blob of memory for a State.

inst_ is stored separately since it's colder; this also
means that the States for a given DFA are the same size
class, so the allocator can hopefully pack them better.

Change-Id: Ia447bcaf508c507944cd35d2dd8ac4c7a845c3ef
Reviewed-on: https://code-review.googlesource.com/c/re2/+/61110
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>
1 file changed