forked from OSchip/llvm-project
4eaedde530
The tile size was previously uninitialized. As a result, it was often zero (aka. no tiling), which is not what we want in general. More importantly, there was the risk for arbitrary tile sizes to be choosen, which we did not observe, but which still is highly problematic. llvm-svn: 275418 |
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README
Polly - Polyhedral optimizations for LLVM ----------------------------------------- http://polly.llvm.org/ Polly uses a mathematical representation, the polyhedral model, to represent and transform loops and other control flow structures. Using an abstract representation it is possible to reason about transformations in a more general way and to use highly optimized linear programming libraries to figure out the optimal loop structure. These transformations can be used to do constant propagation through arrays, remove dead loop iterations, optimize loops for cache locality, optimize arrays, apply advanced automatic parallelization, drive vectorization, or they can be used to do software pipelining.