forked from OSchip/llvm-project
9ae56b9a0e
nullptr is not a valid affine expression, and none of the callers check for null, so we eventually hit an isl error and crash. Instead, invalidate the scop and return a constant zero. Differential Revision: https://reviews.llvm.org/D46445 llvm-svn: 332309 |
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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.