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320ec7fa7f
Despite our attempt (build-docs.sh) to build the documentation with SVG, it still uses PNG https://llvm.org/doxygen/classllvm_1_1StringRef.html, and that renders terribly on any high dpi display. SVG leads to smasller installation and works fine on all browser (that has been true for _a while_ https://caniuse.com/svg), so this patch just unconditionally build all dot graphs as SVG in all subprojects and remove the option.
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.