All files in the llvm subfolder are 1:1 copied from LLVM 14.0.6 and are subject to the LLVM license.
You can find a copy of the LLVM license here.
Note that we needed to copy these files, as LLVM removed them in the transition from version 14 to more recent LLVM versions. To avoid LLVM from blocking PhASAR releases, we provide these files ourselves as a temporary solution.
We, as the PhASAR development core team, do not aim for maintaining the here provided LLVM code and will not add any modifications to it, except for compilation fixes when changing the LLVM version (bugfixes, enhancements, etc.). Rather, we will add a custom replacement eventually.