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Ted Kremenek fa41714d8d Implement lazy "copying" of structures and arrays in RegionStore. While
RegionStore already lazily abstracted the contents of arrays and structs, when
doing an assignment from one array/struct to another we did an explicit
element-wise copy, which resulted in a loss of laziness and huge performance
problem when analyzing many code bases.

Now RegionStoreManager handles such assignments using a new SVal could
'LazyCompoundSVal', which basically means the value of a given struct or array
(a MemRegion*) in a specific state (GRState). When we do a load from a field
whose encompassing struct binds to a LazyCompoundSVal, we essentially do a field
lookup in the original structure. This means we have essentially zero copying of
data for structs/arrays and everything stays lazy.

llvm-svn: 78268
2009-08-06 01:20:57 +00:00
clang Implement lazy "copying" of structures and arrays in RegionStore. While 2009-08-06 01:20:57 +00:00
compiler-rt Forgot to add new endianness.h header file. 2009-08-05 19:58:45 +00:00
llvm Add tests for new NEON vld instructions. 2009-08-06 00:38:31 +00:00