Added an allocated memory cache to avoid having to allocate memory over and
over when running JITed expressions. The allocated memory cache will cache 
allocate memory a page at a time for each permission combination and divvy up
the memory and hand it out in 16 byte increments. 



git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@131453 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed