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4cb7170199
The patch adds a nullptr check before accessing the loop blocks in 'hasPossiblyDistributableLoop' function. The existing check for the loop’s containment in the region does not capture nullptr cases when the region covers the entire function. Therefore, it’s better to exit if the basic block isn’t part of any loop Fixes #113772.
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.