55a7af7da5
When running the clang static analyser to check for memory issues, this code originally showed a double free, as the analyser was unable to understand that isl_set_free always returns NULL and consequently later uses of the isl object we just freed will never be reached. Without this knowledge, the analyser has to issue a warning. We refactor the code to make it clear that for empty maps the current loop iteration is aborted. llvm-svn: 280940 |
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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.