Arch Linux

Description:
Per https://polly.llvm.org/:
Polly is a high-level loop and data-locality optimizer and optimization infrastructure for LLVM. It uses an abstract mathematical representation based on integer polyhedra to analyze and optimize the memory access pattern of a program. We currently perform classical loop transformations, especially tiling and loop fusion to improve data-locality. Polly can also exploit OpenMP level parallelism, expose SIMDization opportunities. Work has also be done in the area of automatic GPU code generation.

There is currently a work in progress project to build Linux kernel with it to further enhance the performance ( along LTO and many other )

Would it be possible to build clang/llvm with it?

So far Polly must be built with-in the llvm tree and can't be built outside of it ( like clang )
adding the -DLLVM_ENABLE_PROJECTS='polly' flag to cmake