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Add a new pass to serve as basis for automatic accelerator mapping in Polly. The pass structure and the analyses preserved are copied from CodeGeneration.cpp, as we will rely on IslNodeBuilder and IslExprBuilder for LLVM-IR code generation. Polly's accelerator code generation is enabled with -polly-target=gpu I would like to use this commit as opportunity to thank Yabin Hu for his work in the context of two Google summer of code projects during which he implemented initial prototypes of the Polly accelerator code generation -- in parts this code is already available in todays Polly (e.g., tools/GPURuntime). More will come as part of the upcoming Polly ACC changes. Reviewers: Meinersbur Subscribers: pollydev, llvm-commits Differential Revision: http://reviews.llvm.org/D22036 llvm-svn: 275275
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.