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A check in assert-builds was meant to verify that a load provides a value in all statement instances (i.e. its domain). The domain is commonly gist'ed within the parameter context to contain fewer constraints. However, statement instances outside the context are no valid executions, hence the value provided can be undefined. Refine the check for valid loads to only needed to be defined within the SCoP context. In addition, the JSONImporter had to be changed to allow importing access relations that are broader than the current access relation, but still defined over all statement instances. This should fix the compiler crash in test-suite's oggenc of the -polly-process-unprofitable buildbot. llvm-svn: 329655 |
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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.