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Author SHA1 Message Date
Tobias Grosser d1e33e7061 ScopDetection: Only detect scops that have at least one read and one write 
Scops that only read seem generally uninteresting and scops that only write are
most likely initializations where there is also little to optimize.  To not
waste compile time we bail early.

Differential Revision: http://reviews.llvm.org/D7735

llvm-svn: 229820
 2015-02-19 05:31:07 +00:00
Johannes Doerfert 1f87f485b1 Model scalar writes with uses outside the SCoP 
These write are important as they will force the scheduling and code
  generation of an otherwise trivial statement and also impose an order of
  execution needed to guarantee the correct final value for a scalar in a loop.

  Added test case modeled after ClamAV/clamscan.

llvm-svn: 228847
 2015-02-11 17:02:52 +00:00