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Move PassInstrumentationAnalysis into PassInstrumentation.h and stop including it in PassManager.h (effectively inverting the direction of the dependency). Most places using PassManager are not interested in PassInstrumentation, and we no longer have any uses of it in PassManager.h itself (only in PassManagerImpl.h).
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.