Sean Callanan 70cac8fd81 Remove the process's reservation cache and don't
bother checking if a region is safe to use.  In
cases where regions need to be synthesized rather
than properly allocated, the memory reads required
to determine whether the area is used are

- insufficient, because intermediate locations
  could be in use, and

- unsafe, because on some platforms reading from
  memory can trigger events.

All this only makes a difference on platforms
where memory allocation in the target is impossible.
Behavior on platforms where it is possible should
stay the same.

<rdar://problem/14023970>

llvm-svn: 185046
2013-06-27 00:10:26 +00:00
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