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This is useful when we face certain intrinsics such as `llvm.exp.*` which cannot be lowered by the NVPTX backend while other intrinsics can. So, we would need to keep blacklists of intrinsics that cannot be handled by the NVPTX backend. It is much simpler to try and promote all intrinsics to libdevice versions. This patch makes function/intrinsic very uniform, and will always try to use a libdevice version if it exists. Differential Revision: https://reviews.llvm.org/D37056 llvm-svn: 312239 |
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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.